Search found 198 matches

by Jason M Bryant
Thu Sep 03, 2015 2:24 am
Forum: Hands
Topic: New Print-in-Place Fingers: Three Phalanges, No Elastics
Replies: 11
Views: 3032

Re: New Print-in-Place Fingers: Three Phalanges, No Elastics

Okay, I've been playing with the finger I printed a little more, and the crimping stopped working. One issue is that the finger never loosened up. So the pulling I've been doing on the joint has been with a lot of force to try to make the finger close. However, the fingers would also have a lot of f...
by Jason M Bryant
Tue Sep 01, 2015 12:20 am
Forum: Hands
Topic: New Print-in-Place Fingers: Three Phalanges, No Elastics
Replies: 11
Views: 3032

Re: New Print-in-Place Fingers: Three Phalanges, No Elastics

I just printed out a finger at 100%. Here are my first impressions. Breaking the finger joints is a bit hard. I worry that I'm going to break it in a bad way. I've been working the joints for several minutes, and they are still very stiff. I'm not sure I'll ever get this finger to move freely. I've ...
by Jason M Bryant
Wed Aug 26, 2015 11:44 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

We're actually doing recipient testing now. The feedback isn't through the forums, so it isn't as visible.

I haven't received the first round of feedback yet, so I'm not sure what the timeline is. I'll let you know when I know more.
by Jason M Bryant
Sat Aug 22, 2015 2:26 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

So far, what I've uploaded is what I've got. Nick is the one responsible for that great cuff he made. He's still improving it.
by Jason M Bryant
Fri Aug 21, 2015 1:30 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

1) This is how the support material was initially done. It printed fine on my machine, but had problems on someone else's. It's such a small part of the build time that it didn't seem worth the trouble. 2) That's unusual. Could you post of picture of the gauntlet so that I can see how the screws are...
by Jason M Bryant
Tue Aug 18, 2015 7:54 am
Forum: Hands
Topic: New Print-in-Place Fingers: Three Phalanges, No Elastics
Replies: 11
Views: 3032

Re: New Print-in-Place Fingers: Three Phalanges, No Elastics

I'm heading back home (and to my printer) soon. I've accumulated quite a list of things to work on for the Phoenix, but I do want to print some of these out and play around with them.
by Jason M Bryant
Fri Aug 14, 2015 2:46 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

You can find dental bands online. There are links to amazon pages where you can buy them in the instructions parts list. The idea is to get the size that is just barely tight enough to pull the fingers back up to the straight position.
by Jason M Bryant
Wed Aug 05, 2015 10:15 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Thank you. I look forward to playing with this.
by Jason M Bryant
Sat Jul 11, 2015 7:47 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 6180

Re: Osprey Hand Beta Testing

Hi Peter. I can't print one out right now, but I'll order the parts and take them back with me to China at the end of the summer. You should put a link up on the Google+ group. Just show a picture of the hand, give a quick description, and then link to here. That always helps me get the word out abo...
by Jason M Bryant
Sat Jul 11, 2015 5:15 pm
Forum: Beta Testing
Topic: Leather Raptor Gauntlet (Both Reloaded and Classic)
Replies: 2
Views: 1058

Re: Leather Raptor Gauntlet (Both Reloaded and Classic)

Sewing is a bit of a pain. However, it's not as daunting as it seems. I'll try to minimize the amount of sewing necessary in future designs. Really, it's sewing on the velcro that's most of the work. Switching to straps and buckles may be a better option. The design definitely needs to be reworked a...
by Jason M Bryant
Thu Jul 09, 2015 11:29 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I'm talking with Melina and John about opening this up for recipient testing. Melina says to wait, but I don't think it will be much longer. As soon as we're ready, I'll make a big announcement and make sure to tag you in it. Stephen Davies made a thermoform palm, but that was for version 1, and I'd...
by Jason M Bryant
Wed Jul 08, 2015 1:22 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Sure, I just made a note of it.
by Jason M Bryant
Tue Jul 07, 2015 11:59 pm
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

The fingers so far are for the Raptor Reloaded, although it could be done for the Phoenix as well. Ew Chee Guan has been busy with work, but last I heard he used these fingers with a recipient. I'm waiting to hear how that has gone.
by Jason M Bryant
Tue Jul 07, 2015 11:57 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Peregrine, the big issue is the thumb. The thumb on the Phoenix is much bigger than the other fingers. I will be shocked if a #3 Tippi fits on a 165% Phoenix thumb.
by Jason M Bryant
Tue Jul 07, 2015 8:26 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Nicely done. Perhaps we should recommend a larger size starting at 145%. I'd like to wait until someone tests a larger size before I add that to the instructions.
by Jason M Bryant
Mon Jul 06, 2015 11:27 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

John, how did printing the new fingers go? Did you try them with your original printer settings to see if the problems were better?
by Jason M Bryant
Fri Jul 03, 2015 2:52 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

That sounds reversed. Are you sure you don't mean 5/16" bands on the knuckles and 1/4" ones on the fingertips?
by Jason M Bryant
Thu Jul 02, 2015 6:50 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Good stuff. Those errors look similar to what I got on the Raptor Classic and Raptor Reloaded fingers before I attached an external fan pointed at the nozzle. That's about the best we can do with fingers that print at a 33 degree slope.

Thanks for the thorough testing.
by Jason M Bryant
Thu Jul 02, 2015 5:24 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Call for Info Hi guys. We're getting close to the next stage of testing. Before we move on to looking for recipients, I'd really like to collect as much information as possible on how this went and write up a report. I've added a new column to the haphazard spreadsheet on the first page: Results. I...
by Jason M Bryant
Wed Jul 01, 2015 7:14 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I don't think so. What I've heard is that 100% is about right for a three-year-old. Since we don't even recommend using the hands before a child is at least four, there's no need for anything smaller.
by Jason M Bryant
Wed Jul 01, 2015 5:58 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Thanks. The only one you need to check is the fingertip_short, since you've already printed the others.
by Jason M Bryant
Wed Jul 01, 2015 1:14 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Okay, I added a new fingertip_short with the same type of changes. I also renamed the test files to be the default files. So anyone who gets the fingers from this point on should have something that prints more consistently.
by Jason M Bryant
Wed Jul 01, 2015 8:22 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Holy cow, that's a huge difference!

I really thought I was making such a minor change that it wouldn't matter much. Okay, I learned something new about designing to be printed.
by Jason M Bryant
Tue Jun 30, 2015 3:08 pm
Forum: Arms
Topic: Airy Arm
Replies: 36
Views: 9089

Re: Airy Arm

Actually, what I meant is that I use 1.75 for printing. I've never tried to use it for anything else.
by Jason M Bryant
Tue Jun 30, 2015 1:42 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

No, I never got an answer on this. I think the team that put the Raptor Wing together, moved on and didn't support it. The white one in pictures I put up is from their development pics. It's not the design that we were all given. I put up a render that has the version that is in the STLs we were giv...
by Jason M Bryant
Mon Jun 29, 2015 7:00 pm
Forum: Hands
Topic: Cost/Benefit of thermoform palms
Replies: 6
Views: 1361

Re: Cost/Benefit of thermoform palms

Skin contact with PLA is a good point. I feel like we should have a way to address that, like a coating that can be applied to the thermomesh after it is shaped. It might be as simple as taking off the thermomesh, putting a thin, breathable fabric between the mesh and the hand, putting the mesh back...
by Jason M Bryant
Mon Jun 29, 2015 6:43 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

James, I've added two files to the dropbox. fingertip_straight_test thumbtip_straight_test Would you mind testing them at your original settings, the ones that had the most trouble? The differences are pretty minor. The angle is less rounded at the base, which hopefully will make the layers after th...
by Jason M Bryant
Mon Jun 29, 2015 5:30 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

There's little to no difference between the dental band thumbtip and the current thumbtip. Certainly not in the area that would affect printing. Reducing print speeds is probably the biggest thing that helped. The fingertips and thumb tips are definitely a little more tricky to print than the Raptor...
by Jason M Bryant
Sun Jun 28, 2015 3:24 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

Hi Ianadan. This hand was just an experiment. The lessons that I learned from this were used to help develop the Phoenix hand. You can find another thread about that in the beta section of the forum. It isn't ready for recipient testing yet, but we'll be sure to make an announcement when it is. Ther...
by Jason M Bryant
Sat Jun 27, 2015 3:08 am
Forum: Hands
Topic: Cost/Benefit of thermoform palms
Replies: 6
Views: 1361

Re: Cost/Benefit of thermoform palms

Well, they're still getting pushback, right? Force exerted against a plastic palm and force exerted against a plastic cup are both force. The thermomesh palm is going to push back against their palm just like anything else.
by Jason M Bryant
Fri Jun 26, 2015 3:54 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Dental Band Update I've edited the first post in this thread. Now the chart with everyone's names and hand sizes also has the dental band sizes. As people start getting dental bands and testing to see what is the best size, please post here so I can update the chart. What To Look For There are two ...
by Jason M Bryant
Wed Jun 24, 2015 10:36 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

That's a very interesting whippletree variant. I'm a little worried about how thin it is at the back. Hopefully it doesn't break. Besides that, the main thing to test is whether the whippletree swivels as much as the regular version. If it does work, then the swivel pin could actually be shortened. ...
by Jason M Bryant
Wed Jun 24, 2015 3:53 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

That looks great, Chris. I'm guessing that at 150%, you'll do fine with 3/8 bands for the palm knuckles and 5/16 bands for the fingertip knuckles. Let us know how that goes. The biggest hand I've made is 125%. At that scale, 3/8 and 5/16, worked, but they didn't keep the fingertips straight while gr...
by Jason M Bryant
Tue Jun 23, 2015 11:25 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

John, you're using the same slicer as me with the same settings. I have no idea why you're getting a little hole in a place where I'm not. I'm a little stumped by this one.
by Jason M Bryant
Tue Jun 23, 2015 11:22 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Well, if someone wants to use only the long fingers, that's easy enough. Long and short have the same joints and pins, so there's no mechanical difference at all. We can keep the two different lengths of fingers, but anyone who only wants to use the long fingertips can do that. Consider the short fi...
by Jason M Bryant
Tue Jun 23, 2015 1:46 pm
Forum: General R&D
Topic: DaVaHaG - Dynamically Variable Hand Grip tension box
Replies: 7
Views: 2526

Re: DaVaHaG - Dynamically Variable hand Grip tension box

The writing instrument grip is also good for drinking from tea cups.
by Jason M Bryant
Tue Jun 23, 2015 8:47 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

V5 now uploaded Revised Files -all the versions of the palm -thumb and finger phalanges Changes -Moved the thumb joint on the palm inward a little bit -Removed a thermomesh hole that was covered by the thumb -Minor cosmetic changes to the phalanges so they'll print better. 45 degree angles instead ...
by Jason M Bryant
Tue Jun 23, 2015 5:55 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Hi Justin. The Raptor Classic has different finger sizes and the Raptor Reloaded has all the same size. So I understand that there is an advantage of simplicity in only having one finger size. However, I don't think having a long and a short size is much more complicated or difficult. Since the hand...
by Jason M Bryant
Mon Jun 22, 2015 4:17 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

That's really odd. The 3D file shows that there's over almost a millimeter and a half between the wire route and the roof. It's not any thinner there than at any other place over a wire route on the roof. I'm not seeing anything like that on my prints. I do see some tiny gaps at certain angles, but ...
by Jason M Bryant
Mon Jun 22, 2015 12:43 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Cool, James. Thanks. By the way, everyone, version 5 is incoming. I'm printing something right now, although it might be another day before I can assemble, test, and upload it. I hope it doesn't seem like I'm expecting everyone to print out a new hand with every version. For the most part, I just wa...
by Jason M Bryant
Sun Jun 21, 2015 11:30 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

That's really interesting, James. I'm assuming that you made it 10% shorter, but kept it the same in the other two dimensions. Is that correct? How do you feel that it grips better? You say that it curls better, but I'm not sure what you mean. Can you post some pictures? I'd love to see a straight o...
by Jason M Bryant
Sun Jun 21, 2015 6:21 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Yeah, one of the things that is odd about the hands we make is how truly big the fingers are. I built a hand at about 180% for an adult, and it was a little weird seeing him wear that massive thing. I think we don't notice often because we're usually looking at children. The hands we make for them d...
by Jason M Bryant
Sat Jun 20, 2015 11:50 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

V4 now uploaded

Revised Files
-all the versions of the palm

Changes
-Moved the Thermomesh holes so they don't conflict with the Velcro holes
-Fixed some minor geometry errors with the thermomesh holes.
by Jason M Bryant
Thu Jun 18, 2015 2:04 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Version 3 Is Offical Woo! I finished the 100% with the new parts. I'm very happy with how it works. Plans for Version 4 The thermomesh holes on the bottom of the palm currently conflict with the Velcro screw holes. That's the only issue I'm aware of at the moment. Let me know when you guys find mor...
by Jason M Bryant
Thu Jun 18, 2015 1:04 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Sarah, to you have Lee Tippi gel grips to put on the hand? I will be stunned if a #3 Tippi grip goes on a 170% thumb.
by Jason M Bryant
Thu Jun 18, 2015 5:11 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Originally, the channels were round. They were changed because a flat roof bridges better.

If you can't turn off supports in that area, maybe you should print the files that have built-in supports.
by Jason M Bryant
Wed Jun 17, 2015 5:09 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Version 3 has been uploaded However, I haven't had a chance to test more than one finger, and I probably won't be able to fully assemble it for another day or more. So I uploaded the files with a "V3" at the end, but I left the files from version 2. If you want to test v3, great. If you w...
by Jason M Bryant
Wed Jun 17, 2015 4:10 pm
Forum: Arms
Topic: Airy Arm
Replies: 36
Views: 9089

Re: Airy Arm

"3mm PLA post" means cut off a run of the 3mm filament from the roll that you feed your printer. I use 1.75mm filament, personally.
by Jason M Bryant
Wed Jun 17, 2015 2:19 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Cool! I'm very eager to see how the bigger hand turns out. I printed one finger and phalanx at 170%, and I was able to use a rubber band from an office supply store in the joint! If you're printing with the supports from Simplify3D, I imagine you'll want to use the regular "palm" files ins...
by Jason M Bryant
Wed Jun 17, 2015 4:28 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Wait, what?

Tell me more about this event. Is there a post about it somewhere? Are there pictures?
by Jason M Bryant
Wed Jun 17, 2015 2:51 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Let's wait for V3. One reason I broke them into two updates is so that if the thumb change goes horribly wrong, I'll have something solid to revert to. V3 is definitely going to need some careful testing. I'm doing a partial print of it right now to test a joint. If that goes well, I'll print a full...
by Jason M Bryant
Tue Jun 16, 2015 11:15 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Also, I've updated the instructions. James, thanks a ton for the suggestions and proofreading.
by Jason M Bryant
Tue Jun 16, 2015 10:54 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

V2 now uploaded Revised Files -all the versions of the palm -knuckle pin long -knuckle pin short Changes -Raised and rounded the roof of the thumb joint on the palm -Increaded hole size for thumb knuckle pin -added bevel to long and short knuckle pins -changed slope on palm wrist joint from round t...
by Jason M Bryant
Tue Jun 16, 2015 12:23 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I'm using a Wanhao Duplicator 4x, which is a Makerbot clone.

I'm using slic3r to slice the files.
by Jason M Bryant
Mon Jun 15, 2015 10:33 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I've flattened that area out and raised up the lip at the front a bit. Hopefully that will help.

I love that we're getting different print problems from different people. It's so nice to have several people and test with different machines.
by Jason M Bryant
Mon Jun 15, 2015 2:16 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I feel like the thumb should come forward a few millimeters. No rotation or anything, just slide the whole thing a bit closer to the fingers. The thing is, that would require removing one of the Velcro screw holes. I really like those four holes in the bottom, they feel like the most solid way to an...
by Jason M Bryant
Mon Jun 15, 2015 11:34 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

John, I'd like to get a bit more clarification on point 1. How much trouble did it have? That joint has a rounded lip at the front, then the roof behind it is raised a little higher. Did you have trouble in the lip or in the raised part of the roof? EDIT: I'm going to take an extra day before I uplo...
by Jason M Bryant
Mon Jun 15, 2015 12:51 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

John, a new version of just the supports has been uploaded. The file is named support_test.

I'm going to try printing it and the lastest version after lunch. If it works out, I'll upload it after that, so it would be about 24 hours before it's available.
by Jason M Bryant
Sun Jun 14, 2015 11:29 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

Complete instructions have been uploaded. I know everyone here is an experienced user and doesn't need them, but I'd appreciate some proofreading. I tried to make the instructions more streamlined that what I've written in the past, and I want to make sure I didn't leave out something important.
by Jason M Bryant
Sun Jun 14, 2015 2:25 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

I made the change to the supports, along with another change. I'll do a quick 100% test print tomorrow before I upload it. The real test will be how well it works on your machine, since it already works on mine. Actually, how about I upload an stl that is just the supports? That way you can test it ...
by Jason M Bryant
Sun Jun 14, 2015 6:10 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

For the curling finger problem, I get that as well when I don't use an external fan. I get that a little even though I don't heat my bed at all for PLA. Having a fan with a duct that points at the nozzle improves print quality in a lot of ways, for me it completely solves that problem. I guess the f...
by Jason M Bryant
Sat Jun 13, 2015 11:32 am
Forum: Beta Testing
Topic: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED
Replies: 39
Views: 12200

Re: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED

I'm also finding that having the box that far forward doesn't leave enough room for the tensioner pins.
by Jason M Bryant
Sat Jun 13, 2015 7:15 am
Forum: Beta Testing
Topic: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED
Replies: 39
Views: 12200

Re: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED

I just assembled a 125% test hand using the V8 thermoform gauntlet. I was surprised by how much the box came forward. It doesn't have the extra space in the front that the regular gauntlet has. Is there a particular reason why this changed? Do you think this change might be problematic? I was actual...
by Jason M Bryant
Sat Jun 13, 2015 6:18 am
Forum: Hands
Topic: Announcing the E-Nable Eagle Hand, currently in alpha
Replies: 7
Views: 2807

Re: Announcing the E-Nable Eagle Hand, currently in alpha

Thanks! I did flatten out the roof a little bit. After printing a couple of hands, I've flattened it a tad more. It's not as much flat area as your suggestion, but I'm trying to get it to work better with the built-in supports. I'm also a little unhappy with a couple other areas of the support, but ...
by Jason M Bryant
Sat Jun 13, 2015 3:07 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Issue: It's way too hard to remove the knuckle pins.

It wasn't too bad on my 100% test hand, but the 125% hand is painfully hard.

I've got a couple of ideas for how to address this. They won't be quite as pretty, but they shouldn't be too noticeable, either.
by Jason M Bryant
Sat Jun 13, 2015 3:05 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Could you post a picture of your swivel pin and your box? I'm a little confused about how it can be the same length. It shouldn't be much shorter, but it should be a little shorter.
by Jason M Bryant
Sat Jun 13, 2015 12:31 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Good job! That hand looks great. It's cool to know you printed fine without extra supports. The swivel pin shouldn't be the entire length of the box. It's about 3/4 the length. DSCF3500.JPG That's not nearly as much as the traditional pins, so you have to get the wiring fairly close to start with. Y...
by Jason M Bryant
Fri Jun 12, 2015 11:05 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Wrist pin files have been added. I fixed the manifold problems on the gauntlet. Blender 3D and slic3r both showed it as manifold, but netfabb found where the problems were. The fingertip_short file is driving me nuts. Like the gauntlet, it shows up as manifold in Blender 3D and in slic3r, but netfab...
by Jason M Bryant
Thu Jun 11, 2015 10:43 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Stephen, I'd really like to take a look at that thermomesh palm, but it looks like you linked to the thumbtip.
by Jason M Bryant
Wed Jun 10, 2015 10:44 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Stephen, I actually have a special test for your hand. Will a Lee Tippi fit on that huge, 150% thumb? That's going to be a beast.

If anyone is brave enough to print a hand at over 150%, I'll have the same question.
by Jason M Bryant
Wed Jun 10, 2015 10:05 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

Re: The New Hand (previously Eagle Hand) fabrication and mechanical function testing

Stephen, the thermopalm for the Raptor Reloaded will not fit this hand. The shape of the palm is a little different, so I'll have to make a new thermopalm when we're farther along with testing. Adam, the original post is here. http://forums.e-nable.me/viewtopic.php?f=9&t=162 Thanks for all your ...
by Jason M Bryant
Wed Jun 10, 2015 2:16 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 30518

The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing

The Phoenix Hand is ready for fabrication and mechanical function testing. This is not intended for recipients yet. At this stage we're looking for big problems that can be spotted by having many people build hands at various sizes. Guidlines: 1) Please post all feedback here on the forum. You can a...
by Jason M Bryant
Sat Jun 06, 2015 7:22 am
Forum: Hands
Topic: Announcing the E-Nable Eagle Hand, currently in alpha
Replies: 7
Views: 2807

Re: Announcing the E-Nable Eagle Hand, currently in alpha

The testing process:

10 Look at thing and make list of problems to fix
20 Fix problems
30 Goto 10
by Jason M Bryant
Tue Jun 02, 2015 12:07 pm
Forum: Hands
Topic: Announcing the E-Nable Eagle Hand, currently in alpha
Replies: 7
Views: 2807

Re: Announcing the E-Nable Eagle Hand, currently in alpha

Andreas, thanks a lot for the feedback. I'm using Blender 3D. It's a pain sometimes, but it's done okay. I'm going to install Fusion this summer and take a serious look at it. Squaring off the flexor line channels: How about square on top and round on the bottom? Square channels will make sharp corn...
by Jason M Bryant
Mon Jun 01, 2015 4:27 pm
Forum: Hands
Topic: Announcing the E-Nable Eagle Hand, currently in alpha
Replies: 7
Views: 2807

Re: Announcing the E-Nable Eagle Hand, currently in alpha

I did consider that. The Raptor Classic had different length fingers. I'm not sure why that was not done in the Raptor Reloaded. I do know that occasionally people would not notice the different lengths and put the fingers in the wrong places. The easiest thing would be to have two lengths of finger...
by Jason M Bryant
Mon Jun 01, 2015 1:46 pm
Forum: Hands
Topic: Announcing the E-Nable Eagle Hand, currently in alpha
Replies: 7
Views: 2807

Announcing the E-Nable Eagle Hand, currently in alpha

Evolved from the Raptor, sharing DNA with the Falcon, I'd like to announce the Eagle Hand. Eagle Hand.jpg First off, this isn't ready for testing. It doesn't even have screw holes for the velcro yet. This is just the very first test of the hand. I already see stuff I want to change, like how the thu...
by Jason M Bryant
Thu May 28, 2015 11:25 am
Forum: Hands
Topic: Bracer and whippletree for RReloaded - would it work?
Replies: 10
Views: 2307

Re: Bracer and whippletree for RReloaded - would it work?

There's a few things to remember for printing. One is that you need a flat side. On the regular gauntlet, it's the bottom of the rails. They lay flat on the bed, and the rest grows up out of that. So there has to be something flat as a base. The base has to be large enough to support the weight, you...
by Jason M Bryant
Wed May 27, 2015 11:36 pm
Forum: Hands
Topic: Bracer and whippletree for RReloaded - would it work?
Replies: 10
Views: 2307

Re: Bracer and whippletree for RReloaded - would it work?

I haven't seen a belt design. Looking at your design, it's very interesting. I like how compact it is. I do have two concerns. One, it doesn't look very printable. Two, it looks like it would dig the plastic bars into the recipient's arms on either side of the belt. Keep working on it. This has a lo...
by Jason M Bryant
Wed May 27, 2015 10:38 pm
Forum: Hands
Topic: Bracer and whippletree for RReloaded - would it work?
Replies: 10
Views: 2307

Re: Bracer and whippletree for RReloaded - would it work?

Yes, I've got a leather gauntlet/bracer design in another thread. It's in the beta section.

I'm not entirely happy with it yet. I plan on modifying it, but I'm a little busy with another project at the moment.
by Jason M Bryant
Mon May 25, 2015 1:26 am
Forum: Hands
Topic: Question about angles
Replies: 2
Views: 951

Re: Question about angles

I don't think having the fingers splayed out that much is the most common way we use them. Other than trying to palm a basketball, we don't need our fingers to be particularly wide apart. The current placement doesn't have the fingers directly against each other. There is a little bit of space, like...
by Jason M Bryant
Sat May 23, 2015 2:17 pm
Forum: Beta Testing
Topic: Leather Raptor Gauntlet (Both Reloaded and Classic)
Replies: 2
Views: 1058

Leather Raptor Gauntlet (Both Reloaded and Classic)

DSCF3341.JPG Files available on Dropbox: https://www.dropbox.com/sh/cmiq2n33mf7723o/AACuc48E0Er6Pdmdq3mS9U1ja?dl=0 Advantages of the leather gauntlet: - Nice, tight fit. - You can't break leather. Okay, maybe a 10-year-old kid being a 10-year-old kid will find a way to break the wrist pins, but tha...
by Jason M Bryant
Fri May 22, 2015 1:38 pm
Forum: Beta Testing
Topic: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED
Replies: 39
Views: 12200

Re: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED

Gregg, I may have an alternative for you in the next few days. Stay tuned.
by Jason M Bryant
Fri May 22, 2015 12:04 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

I can raise the posts on the proximal phlanges, but not on the fingertips. That's the side it prints on, so it all has to be level.

My method is to start the rubber band on the fingertip, then pull the finger down a bit and slip the band over the phalanx post.
by Jason M Bryant
Fri May 22, 2015 9:11 am
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

GreggDennison, you mentioned in another thread that you'd like the posts to be a little taller to make it easier to get the bands on. I can make some of the posts taller, but not all of them. Which ones gave you trouble? I'm guessing that the thumb posts were the easiest, but the palm posts for the ...
by Jason M Bryant
Wed May 20, 2015 12:15 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I'm glad you figured out the issue, Greg. Thanks for the feedback, it's very useful.

What size is the hand?
by Jason M Bryant
Tue May 19, 2015 9:20 am
Forum: Hands
Topic: R&D issue: Where should the knuckles be?
Replies: 4
Views: 1285

Re: R&D issue: Where should the knuckles be?

Hi Blanche. I watched your very interesting video. One thing to keep in mind is that the hands we're making will have a human hand inside them. Making the metacarpals curve inward might be problematic with our designs since in the end the palm has to be a plastic cup that goes around a human palm. I...
by Jason M Bryant
Fri May 15, 2015 5:20 am
Forum: Hands
Topic: R&D issue: Where should the knuckles be?
Replies: 4
Views: 1285

R&D issue: Where should the knuckles be?

If you look at your hand, one of the first things you'll notice is that the fingers are different lengths. Look a little closer, and you'll notice that the pinky isn't actually that much shorter than the ringer finger, it's also that the knuckle at the palm is lower, lowering the whole finger. I don...
by Jason M Bryant
Tue May 12, 2015 8:56 am
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Re: Wiring angle - an issue of which joint bends first.

Here's the video that I posted on the Google Group.

https://youtu.be/LAvAC101WXU
by Jason M Bryant
Mon May 11, 2015 5:52 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Gregg, the first thing I would suggest is that you check the tension in the elastic cables. If one is not as tight as the others, it will bend sooner.
by Jason M Bryant
Sun May 10, 2015 2:14 pm
Forum: Hands
Topic: How would you add an opposable thumb to a Raptor style hand?
Replies: 2
Views: 1336

Re: How would you add an opposable thumb to a Raptor style hand?

There's also this rather ugly option. Untitled-1.jpg The advantage is that it would definitely work. The disadvantage is that in the resting position, you get a hand position that looks totally unnatural. I'm considering calling this the Eagle Hand, so a bird-like claw isn't entirely inappropriate, ...
by Jason M Bryant
Sun May 10, 2015 6:29 am
Forum: Hands
Topic: Dan Aukes' box of goodies
Replies: 1
Views: 730

Re: Dan Aukes' box of goodies

Cool stuff. I'll definitely dig into it later. I think someone posted something related to number 1 a few months ago. It wasn't this in depth, but I member a summary of results that talked about bending the fingers until the joints met resistance, then bending the next set of fingers. It's why I've ...
by Jason M Bryant
Sun May 10, 2015 1:41 am
Forum: Hands
Topic: How would you add an opposable thumb to a Raptor style hand?
Replies: 2
Views: 1336

How would you add an opposable thumb to a Raptor style hand?

I'm working on a new hand design. It's the same basic style as the Raptor family. Several people have said they'd love the thumb to be more opposable, like the Flexy Hand. That's proving to be a problem. When I try to figure out where the hinges should go, I get stuff like this. bad thumb.jpg bad th...
by Jason M Bryant
Sun May 10, 2015 12:15 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Hi Francisco. This is really neat. I like the opposable thumb system. Unfortunately, I can't see the youtube video that you linked to. It was set to private. Could you change it to public?
by Jason M Bryant
Fri May 08, 2015 6:20 pm
Forum: Hands
Topic: Why do we have wrist caps?
Replies: 3
Views: 763

Re: Why do we have wrist caps?

Those points make sense, but I'm not sure how much they actually add up to. On my test hands the caps tend to float a little loose. It doesn't really seem to be doing much to hold it in. I guess the main advantage is that when the pin does rub against the cap, the cap rotates with it. The palm obvio...
by Jason M Bryant
Fri May 08, 2015 4:10 pm
Forum: Hands
Topic: Why do we have wrist caps?
Replies: 3
Views: 763

Why do we have wrist caps?

Was there ever a hand that didn't have wrist caps? Are we sure that the wrist pins would wear out faster if they just connected the gauntlet to the palm with no caps?
by Jason M Bryant
Wed May 06, 2015 10:39 am
Forum: Beta Testing
Topic: Palm Mesh
Replies: 14
Views: 3908

Re: Palm Mesh

Awesome! Bolting the mesh on worked really well with my recipient. It was able to print the palm in ABS and the mesh in PLA, so the palm didn't change at all when I dipped everything in hot water. The only catch was that the first mesh I printed broke at one of the corners. I also like the idea of i...
by Jason M Bryant
Tue May 05, 2015 8:07 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

Adam, you mentioned on the google group that you moved the hinge point down very slightly for the second joint so it has a slightly smaller moment arm. Which joint do you mean, the joint connecting the fingertip to the proximal phalanx?
by Jason M Bryant
Tue May 05, 2015 12:55 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Okay, Version 4 is in my dropbox. I based this design on my new finger designs, so there is a finger *and* a mold. I put in a flange. On the 100% finger there isn't a lot of room, so see what you think. It also might print better or worse on a larger hand. The mold is a little more substantial. I wa...
by Jason M Bryant
Sun May 03, 2015 1:18 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

I have added some improvements to to the new hand. First, I haven't had any rubber bands break since I switched to the larger size. This isn't even the strength I want, or even as large as I think they can be, so that's very encouraging. After that, I changed some angles of some surfaces and rounded...
by Jason M Bryant
Fri May 01, 2015 11:48 pm
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Re: Wiring angle - an issue of which joint bends first.

Other way around. The slightly shorter band is on the fingertip. That pulls it tighter, keeping it straight while the joint at the palm is bending.
by Jason M Bryant
Fri May 01, 2015 4:14 pm
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Re: Wiring angle - an issue of which joint bends first.

I think I've got it! DSCF3312.JPG Trouble and I both had the same idea, using slightly stronger dental elastic bands on the fingertip than on the phalanges. I didn't think that would be nearly enough, since there's a lot of leverage working against it. Well, I got new rubber bands today, slightly lo...
by Jason M Bryant
Fri May 01, 2015 2:53 pm
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Re: Wiring angle - an issue of which joint bends first.

I managed to take a good shot comparing the regular wiring to the wiring with more leverage.

DSCF3310.JPG
DSCF3310.JPG (45.79 KiB) Viewed 1516 times
by Jason M Bryant
Fri May 01, 2015 11:48 am
Forum: General Administrative
Topic: I constantly have to login to this forum.
Replies: 1
Views: 1230

I constantly have to login to this forum.

Usually I come to the forum, and I am already logged in. Not always. That's actually fine, I can understand if my VPN confuses the login a bit. However, sometimes I have to login constantly. I click Reply, it shows my logged in, I click submit, and I'm sent to a page asking me to login. Of course, a...
by Jason M Bryant
Fri May 01, 2015 11:26 am
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

I got new rubber bands. Unfortunately they're the same strength as before, 3.5onz. I have to try and find another company in China that I can order rubber bands from. The new bands I got *are* longer. These are 1/4, which still seems to be more than tight enough to straighten the fingers. I'd like t...
by Jason M Bryant
Fri May 01, 2015 10:15 am
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Re: Wiring angle - an issue of which joint bends first.

Well, that didn't go as I imagined. Here's what I tested. DSCF3304.JPG As you can see I built a little bar into the palm, right under where the thumb is attached. I cut that joint off the model so that I didn't have to print a whole palm to test it. This works pretty well, I get a finger sticking ou...
by Jason M Bryant
Thu Apr 30, 2015 11:25 am
Forum: Hands
Topic: Wiring angle - an issue of which joint bends first.
Replies: 6
Views: 1527

Wiring angle - an issue of which joint bends first.

I brought this issue up during a recent R&D hangout, but I felt it deserved to be fleshed out a bit. One problem that I have with our hands is that they bend the fingertips long before they bend at the palm. It's not just a little bit, if you hold a fingertip and try to keep it straight as you b...
by Jason M Bryant
Thu Apr 30, 2015 3:36 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Thanks for the feedback. I'm so glad he's getting something out of it! I don't think there's a minimum size. I do all of my testing at 100%, and there seems to be decent adaptability in the fingers at that size. I find that there isn't too much trouble in getting the fingers around a cup or most oth...
by Jason M Bryant
Wed Apr 29, 2015 11:48 am
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

Someone on an R&D hangout mentioned that same issue. They said that someone in the middle east put a latex glove over a flexihand and was very happy with ho natural it looked.
by Jason M Bryant
Wed Apr 29, 2015 3:40 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I tried making the whippletree a little wider. I thought that might give a little more leverage and make it easier to pull up the left two fingers while pulling the right two fingers down. It wasn't a noticeable improvement. I'm really not sure that it is necessary, anyway. The test we all go for is...
by Jason M Bryant
Tue Apr 28, 2015 12:33 pm
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

I seriously doubt that Autodesk could do anything. China has been cracking down on VPNs lately. A ton of stuff that used to work doesn't anymore.

Right now I'm happy using blender 3D. When I head home in early July I'll look into getting Fusion 3D again.
by Jason M Bryant
Mon Apr 27, 2015 8:36 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

Above I gave three suggestions for the posts on the fingers. Number 2 was to make the base of the posts flare out so they'd have more strength at the base. I did that on my Raptor remix, but I ended up taking it out. The posts pushed the rubber bands too far to the side, which made them get caught i...
by Jason M Bryant
Sun Apr 26, 2015 11:23 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Re: Rubber Band Raptor Reloaded

Thanks Adam, that's great information. Drew, thanks a ton for offering to put together a chart. Hopefully Adam's advice narrows down how many kinds you need to buy. Since the 6.5 oz bands are thicker, that might be an issue. Obviously the channels around the posts are only so big. Hopefully I can ge...
by Jason M Bryant
Sun Apr 26, 2015 2:44 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 4693

Rubber Band Raptor Reloaded

I have three hands in my home that I use for testing. I've rewired them over and over to try out new parts. DSCF3290.JPG The first is a white Raptor Classic. It uses rubber bands for the elastic. I just took regular rubber bands, cut them once each to make long strings, and wired the hand up. The se...
by Jason M Bryant
Fri Apr 24, 2015 1:56 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

It should be enough. Remember, 100% is the size for a three-year-old. With decent cord, I'd be much more worried about tying a good knot than two strands of cord breaking. Well, that's what testing is for, at least. I'd really like to find a solution that does away with tensioner pins entirely. I ha...
by Jason M Bryant
Fri Apr 24, 2015 12:20 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Joe, from the photo you sent me, it looks like you fit two loops through the whippletree with room to spare. Is that right?

From the angle of the picture, I can't see the see the hole in the swivel pin.
by Jason M Bryant
Tue Apr 21, 2015 9:07 am
Forum: General Getting Started
Topic: Minimum Build Volume
Replies: 2
Views: 1262

Re: Minimum Build Volume

At that size, you can barely print a guantlet at 110%, which is generally only going to be good enough for a 3 year old. Getting a base that is at least 125x100 will let you make hands up to about 125%, which covers a lot of children up through about 12 years old. That will get a lot of people, so I...
by Jason M Bryant
Wed Apr 15, 2015 4:53 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

I can't download it. I live in China and autodesk's system for streaming doesn't seem to play well with that.
by Jason M Bryant
Tue Apr 14, 2015 11:33 pm
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

No, I don't have a solution, I was just wondering. It sounds like you're working on it. I don't have a 3D program that works with parametric stuff, so I get a little jealous about that.
by Jason M Bryant
Tue Apr 14, 2015 4:27 pm
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Ooh, I'd love to get it to a recipient. I'm working on a new finger design. Even if I can't expand the area of the silicone, I think it will be an improvement. Plus, I can get you a thumb with a soft tip, too. I really like having a thumb that is wider than the fingers. We should have something real...
by Jason M Bryant
Tue Apr 14, 2015 8:37 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

Here's another question about crimping. From looking at the files, it looks like the hole for the crimper is a slightly bigger radius than the crimper. Is that right? If so, wouldn't that difference cause a problem as you scale up? It seems like what fits perfectly at 100% would have problems at 135%.
by Jason M Bryant
Mon Apr 13, 2015 1:28 pm
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

By the way, if this works, I've got another idea. I think I can shrink the area taken up by the tie-off bar a little. That would allow room to put gel on the sides of the fingers. Then we'd have added grip on the middle part of the finger, not just the tips.
by Jason M Bryant
Mon Apr 13, 2015 1:19 pm
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Okay, I put up some new files. One has the holes you suggested. The other two have a different structure. I printed them out and they seem pretty sturdy. The question is how well they hold on to the gel and how nice they feel. These new ones would definitely be harder to clean out if you needed to r...
by Jason M Bryant
Mon Apr 13, 2015 1:10 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I'm using fishing wire. At the back I'm using some strong double braided stuff. In the front I'm using some cheap wire that I only use for testing. It's not metal, it just looks that way because of how the light is catching it in the photos. The good fishing wire that I use it pretty strong, but pre...
by Jason M Bryant
Sun Apr 12, 2015 2:53 pm
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

Adam, have you seen what Skip and Jeff have been doing with a whippletree?

https://plus.google.com/+SkipMeetze/posts/7EnhmxiMvmc

Something like this might be an excellent approach for your hand. It would give you the single line that you want, plus adaptive grip.
by Jason M Bryant
Sun Apr 12, 2015 2:27 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

By the way, I had a crazy though for finger hinges with your design. The little holes where you put filament to act as hinges between the joints? Without drilling them out, they're the perfect size for a straightened out paper clip. Put the paperclip in, bend down the sides, and clip off the excess....
by Jason M Bryant
Sun Apr 12, 2015 2:14 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

It would actually be fairly easy to go into my 3D software and cut off the part of the palm that attaches to the thumb. A little 20cm square block of the palm would give me everything I need for testing. That's a good suggestion.
by Jason M Bryant
Sun Apr 12, 2015 1:02 am
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

Printing the finger on the side is a pretty good solution. It will also add strength, since the layers won't sheer off as easily. I didn't do it that way because of exactly the support problems you mentioned. I do my testing at 100%, and it is very difficult to cut out supports in a 1mm gap. Here ar...
by Jason M Bryant
Sat Apr 11, 2015 3:52 pm
Forum: Hands
Topic: Falcon Hand
Replies: 23
Views: 3862

Re: Falcon Hand

I printed out a few of the parts so I could play with the individual elements. I had a bit of trouble with that. I had to re-orient them and add in some supports. What kind of printer are you guys using? It must be quite different from mine. The fingertip really has no flat surfaces on it, so it was...
by Jason M Bryant
Sat Apr 11, 2015 10:27 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

Round 2

DSCF3258.JPG
DSCF3258.JPG (54.05 KiB) Viewed 2028 times


This is RR only right now. You will need a longer snap pin for the thumb, which I have provided.

https://www.dropbox.com/sh/7in9qjh599rc ... Hk2Ya?dl=0
by Jason M Bryant
Sat Apr 11, 2015 3:31 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

For reference, here's how the two parts look like they will fit together in a 3D render.

raptor wing render.jpg
raptor wing render.jpg (30.46 KiB) Viewed 6144 times


Here's my reference of how they should fit together from the raptor wing announcement.

raptorwing-10.jpg
raptorwing-10.jpg (130.24 KiB) Viewed 6144 times
by Jason M Bryant
Sat Apr 11, 2015 12:12 am
Forum: Beta Testing
Topic: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED
Replies: 39
Views: 12200

Re: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED

Excellent work! Here's an idea for the full wrap guantlet. Perhaps the wings don't have to be the same length. If one side was as short as possible and the other side was twice as long, would that be enough so the guantlet would lace up on the side, instead of the top? Then you could put the dovetai...
by Jason M Bryant
Sat Apr 11, 2015 12:02 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Don't worry about my project list. I'm obsessed with fingers now! I'm actually going to start experimenting with the dental elastic solution from the Falcon hand. I think a lot of the times that I think adaptive grip isn't working, it' just that the elastics aren't stretching easily enough. Tell me ...
by Jason M Bryant
Fri Apr 10, 2015 5:56 am
Forum: Hands
Topic: Proximals and elastic
Replies: 7
Views: 2513

Re: Proximals and elastic

Hi Adam. I think I'm going to start work on adapting the elastic bands to the Raptor Reloaded. Unfortunately, I can't get Fusion 3D and work with the original version of the files. So instead of making a nice version that maintains all the parametric features of the RR, I'll have to make a simple ST...
by Jason M Bryant
Fri Apr 10, 2015 12:39 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Hi Kent. Thanks for the feedback! How much can you straighten one or two fingers while the others are still gripping? With my 100% hand I can do this: DSCF3255.JPG That doesn't cause the whippletree to move very much. Straightening two fingers makes it move a little more, but it isn't a huge amount....
by Jason M Bryant
Wed Apr 08, 2015 1:09 pm
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Let's try one more thing. I just finished finger_recessed_v2 before I saw your message. I think it will hold the silicone much better. Maybe that will be enough.

I've uploaded that, so you can give it a shot.
by Jason M Bryant
Wed Apr 08, 2015 4:17 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

I have a question about the Raptor Wing. At the place where the arm cuff connects to the circular part of the elbow joint, the cuff splits into a fork. I looked at the pictures of the little girl with the early version, and it looks like only the elbow joint goes between that fork. However, there's ...
by Jason M Bryant
Wed Apr 08, 2015 2:54 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Here's one other thing.

You mentioned replacing the silicone. Could you try cutting it off the finger? The little "girder" holding the silicone is flat on both sides. It might not be too hard to just cut it off and put new silicone on it.
by Jason M Bryant
Wed Apr 08, 2015 2:45 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Wow, that looks great.

I'll think about the shape of it. Maybe I can make it hold better at that joint.
by Jason M Bryant
Tue Apr 07, 2015 12:18 pm
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

Now with a thumb! Despite me not being an artist, this turned out pretty good. I had a few false starts, but then I figured out a good way to model them. I one point I hit a button and said, "Wow, that looks like a thumb!" These are wider than the standard finger, about 1.5 times as wide. ...
by Jason M Bryant
Tue Apr 07, 2015 7:22 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Here's the finger mold and the finger with the recessed area. I based the mold off of my remolded finger, not the standard RR finger. If people prefer the standard RR finger, I can make a mold for that. https://www.dropbox.com/sh/g9hynjh1u8f238i/AACUdoyVVj4kaRRFg6qK6ft2a?dl=0 There's a little space ...
by Jason M Bryant
Mon Apr 06, 2015 3:32 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

I'm getting a little backed up on ideas that I need to work on.

How about I make the models, then send them to you. You can try it and compare it to your own version. That way the same person can make the same silicone gel and make a direct comparison between the different versions.
by Jason M Bryant
Mon Apr 06, 2015 2:13 am
Forum: Hands
Topic: Proximals and elastic
Replies: 7
Views: 2513

Re: Proximals and elastic

Oh right, the Falcon hand. The thing I like best about the dental elastics design is that you could hand the recipient a little plastic bag of rubber bands and say, "If the elastics break, you can fix it yourself in about 30 seconds."
by Jason M Bryant
Sun Apr 05, 2015 9:04 am
Forum: Beta Testing
Topic: Silicone finger tip mould
Replies: 27
Views: 5086

Re: Silicone finger tip mould

Neat. How about if they were molded right onto the fingers? We could make a version of the fingertip model the has some of the tip removed. The fingertip would fit into the mold, and the silicone would replace the missing tips of the fingers. Here's a quick version that I threw together. mold ready ...
by Jason M Bryant
Sun Apr 05, 2015 6:37 am
Forum: Hands
Topic: Proximals and elastic
Replies: 7
Views: 2513

Proximals and elastic

One thing that bothers me about my test hand is that getting the fingers fully closed is close to impossible. This isn't a problem on the 175% hand that I made, but it is on the 100% hand. One place where I thought I could eliminate some friction was at the joint between the fintertip and the proxim...
by Jason M Bryant
Sat Apr 04, 2015 9:41 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I've changed the orientation of the swivel pins. The geometry is the same, but I think they will be stronger when printed on their sides.

I also changed the names of the files to make things more clear.
by Jason M Bryant
Fri Apr 03, 2015 7:37 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

Here's a link to the file. https://www.dropbox.com/sh/4czgh09iy0jsv0z/AABaxFKrpwgEY_19V4CKHv07a?dl=0 Keep in mind, this is only an experiment that I did very quickly. I think the next step is someone creating a finger from scratch that is even closer to the natural shape of a human finger. I'm also ...
by Jason M Bryant
Fri Apr 03, 2015 1:17 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I've replaced the thumb_tensioner_pin. The previous version was too short.
by Jason M Bryant
Wed Apr 01, 2015 2:22 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Okay, download the Gripper Box Instructions file from dropbox again. I've added a ton of pictures that should clarify things.
by Jason M Bryant
Tue Mar 31, 2015 11:47 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Hi Joe. Thanks for testing! I'll try to get some pics posted. I'll need to restring my hand to take them. Unfortunately, this is my busy time of the week, so it will either happen in the next few hours, or two days from now. For right now, here's a picture of the fully assembled box so you can see h...
by Jason M Bryant
Tue Mar 31, 2015 8:56 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

Okay, I can now say that the Lee Tippi fingertip covers work great with the modified fingertip. I think they actually fit much better than they have on the regular Raptor Reloaded fingers that I've put them on. Finger shape comparison.JPG Fits like a tiny, one finger glove.JPG If anything, the Lee T...
by Jason M Bryant
Tue Mar 31, 2015 7:31 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

Actually, the Lee Tippi fingers have a pretty natural shape. I put them on my test hand, but the shape is only 100%, so it's too small for them to fit well. I'll print a bigger fingertip and see how they work.
by Jason M Bryant
Tue Mar 31, 2015 6:37 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Re: Finger shape

I decided to test a more natural finger shape. I loaded the Raptor Reloaded finger into Blender 3D and did a quick scaling on the fingertip to try to get a natural wedge shape. It actually turned out a lot better than I expected. Old vs new.JPG After wiring up the hand, I strapped it onto my fingers...
by Jason M Bryant
Tue Mar 31, 2015 12:46 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I've reworked a few of the parts now. If you've downloaded it within the last few days, get the whippletree file again. It should be ready for testing now.
by Jason M Bryant
Mon Mar 30, 2015 1:54 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 6657

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Give me a day before anyone downloads this. I'm looking at some leverage issues.
by Jason M Bryant
Sun Mar 29, 2015 1:50 am
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 1654

Re: Velcro, leather and foam

That was very helpful! I'll order some leather and let you know how it goes.
by Jason M Bryant
Sat Mar 28, 2015 4:17 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

I have a bit of feedback about the Raptor Wing, although it isn't user feedback. I've been working on my own version for a few days now. I've tested it a bit, trying to pick up objects, though that's not nearly as much use as a real user would give it. As of yesterday, the only two parts that I hadn...
by Jason M Bryant
Sat Mar 28, 2015 2:13 am
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

Here are a couple of pictures of the new Gripper Box. Here's what it looks like assembled. This isn't exactly the gripper box. My test hand is currently wired into a version of the Raptor Wing, so the box is a little longer. However, this is what the new whippletree looks like inside the box. DSCF31...
by Jason M Bryant
Fri Mar 27, 2015 6:15 am
Forum: Hands
Topic: Finger shape
Replies: 9
Views: 2125

Finger shape

Whenever I make a new hand, I spend a little time trying to use it. It's generally a frustrating experience. Holding on to things isn't nearly as hard as getting them into the hand in the first place. Upright cylindrical objects, like water bottles, are the easiest. Flat objects, like a cell phone, ...
by Jason M Bryant
Fri Mar 27, 2015 3:42 am
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

Gripper Box 3.0 is ready! https://www.dropbox.com/sh/rpln62laoxanvtf/AACI-WYY_5EYVirqRkt6BctVa?dl=0 The whippletree is all one piece now. So far the strength of it seems fine. The snap pins on the last version never actually spun around anyway, so making it a solid piece shouldn't change anything. T...
by Jason M Bryant
Thu Mar 26, 2015 11:49 am
Forum: Hands
Topic: Design Goals and Processes
Replies: 7
Views: 1184

Re: Design Goals and Processes

I'd like to add something. The ability to pick things up of various shapes and sizes. When I try to pick something up, the easiest things to grab are upright cylinders, like water bottles. The hardest things are flat objects, like cell phones. If I pick it up with my other hand and put it in the pla...
by Jason M Bryant
Tue Mar 24, 2015 1:01 pm
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 1654

Re: Velcro, leather and foam

Well, I tried looking for leather at a local market today. The only stuff I found was too thin. I'm looking at ordering leather online, but I'm not sure how to tell if it is stiff or not from the webpages. I've managed to find a few pages that list the thickness of the leather in mm. Is that useful?...
by Jason M Bryant
Mon Mar 23, 2015 12:21 pm
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 1654

Re: Velcro, leather and foam

Peregrine, tell me more about leather, please. I'm imagining just printing a tensioner box with a kind of slot on the bottom, so that it can be sewn onto the top of the bracer. I'm also imagining that the hinge pins could be made to sew onto the bracer as well. How do you deal with those things? In ...
by Jason M Bryant
Mon Mar 23, 2015 12:15 pm
Forum: Technical Q&A
Topic: Printer
Replies: 3
Views: 1242

Re: Printer

I don't think the 152mm x 152mm x 158mm build space is big enough. A Raptor Reloaded guantlet at 175% requires about 170mm of length. My printer is 225x145x100m. (Technically more than 100mm in height, but it starts having problems at 100m). At that size I can print out adult sizes of the standard h...
by Jason M Bryant
Sun Mar 22, 2015 9:16 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

Nick, I don't see the message. If you like, you could put it on github, dropbox, or something like that and post a link here. You could also try sending me another message through Google+.
by Jason M Bryant
Sat Mar 21, 2015 10:19 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

Okay, here's the Raptor Wing, now with adaptive grip! https://www.dropbox.com/sh/e4b9yg8s2204pol/AADLlgONf8gDBq6rTALPEuYia?dl=0 I added a box and a whippletree. I also redesigned the elbow joint and the interface. They're now specific to each hand, so there's a left and right version for those parts...
by Jason M Bryant
Fri Mar 20, 2015 2:06 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

Okay, I've got a version of the Raptor Wing with a whippletree printed. I feel pretty good about it, at least as a first draft. However, it's getting late and there are some things I have to do before bed. I'll get some pictures and a description posted tomorrow.
by Jason M Bryant
Thu Mar 19, 2015 3:40 pm
Forum: Hand-o-matic
Topic: Suggestion: Parametric screw holes
Replies: 4
Views: 1331

Re: Suggestion: Parametric screw holes

I feel like it should be at least two sizes. If we pick something small enough to work on the smallest hand, that seems too small for an adult sized hand. A bigger screw means bigger threads, which means it will be able to withstand the force of an adult. Plus, even if we made it always be the same ...
by Jason M Bryant
Mon Mar 16, 2015 3:02 pm
Forum: Hand-o-matic
Topic: Suggestion: Parametric screw holes
Replies: 4
Views: 1331

Suggestion: Parametric screw holes

In fiddling around with resizing a hand, I felt like changing the size of the tensioner box and the tensioner pins was problematic. I only have two sizes of screws, the two sizes that are recommended in the Raptor assembly instructions. When I scaled the box to the size I wanted, the holes were just...
by Jason M Bryant
Fri Mar 13, 2015 11:22 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

That looks great!
by Jason M Bryant
Fri Mar 13, 2015 4:52 am
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

I'm pretty sure I can adapt my gripper box into something that can work for the RW. My main challenge will be making it sturdy enough. With the design I have in mind, there would only be one wire running from the cuff to the gauntlet. Once I get that working, I or someone else can take a look at mas...
by Jason M Bryant
Thu Mar 12, 2015 1:53 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

Drew, did you get a chance to try printing with the new orientation?
by Jason M Bryant
Thu Mar 12, 2015 1:48 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 7542

Re: Raptor Wing

First thoughts: That cuff is huge. I don't think I could make one of these things bigger than 135% on my machine. This is just begging for a whipple tree attachment. It would mean fewer lines running from the arm to the hand. That would simplify things, possibly enough to make that cuff a bit smaller.
by Jason M Bryant
Tue Mar 03, 2015 8:56 am
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

One other thing, Drew. If the new swivel pin doesn't work, would you also try to print out a tensioner pin from the Raptor Classic? http://www.thingiverse.com/thing:476403/#files My pin is based on that. With the extra thickness it has now, it is actually thicker than the original tensioner pin. If ...
by Jason M Bryant
Mon Mar 02, 2015 3:12 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

Drew, give the swivel pin another try. It's the exact same geometry, I just didn't rotate it on its side this time. That's not even necessary anymore anyway, it was just a holdover from an earlier iteration. According to slic3r, this should have two whole layers in the area where you're showing prob...
by Jason M Bryant
Mon Mar 02, 2015 7:59 am
Forum: Technical Q&A
Topic: I need some serious help with a busted printer.
Replies: 7
Views: 1960

Re: I need some serious help with a busted printer.

Status update: it's printing again. I'm not sure why cleaning out the nozzle worked better this time than last time, but it seems to be working. Of course, I'm only 2 minutes into a 16 and a half hour print, so I'm still quite nervous. I still feel that replacing the insulation is important, so I'm ...
by Jason M Bryant
Mon Mar 02, 2015 1:31 am
Forum: Technical Q&A
Topic: I need some serious help with a busted printer.
Replies: 7
Views: 1960

Re: I need some serious help with a busted printer.

I have a Wanhao Duplicator 4x. I got some help on a different forum. Jetguy told me that it probably wasn't the insulation causing problems with not extruding. He gave me some tips for how to check if it is a motor problem and how to clean out the nozzle. I'll try those things this afternoon and rep...
by Jason M Bryant
Sun Mar 01, 2015 3:46 pm
Forum: Technical Q&A
Topic: I need some serious help with a busted printer.
Replies: 7
Views: 1960

Re: I need some serious help with a busted printer.

One other thing. Does anyone have any tips for how to get the extruder off so I can put the insulation on? As you can see from my pick, I did a pretty bad job of it when I tried to retape what was still there. I don't want to twist those wire until they break, but they don't seem to come off.
by Jason M Bryant
Sun Mar 01, 2015 3:44 pm
Forum: Technical Q&A
Topic: I need some serious help with a busted printer.
Replies: 7
Views: 1960

Re: I need some serious help with a busted printer.

Thank you! Thank you very much! I've had no luck getting my printer to print with the other extruder, so fixing the actual problem seems to be my only solution. It seems to heat up. It just won't print properly, which I'm *hoping* is because of the irregular heat from lack of insulation. If it still...
by Jason M Bryant
Fri Feb 27, 2015 10:17 am
Forum: Technical Q&A
Topic: I need some serious help with a busted printer.
Replies: 7
Views: 1960

I need some serious help with a busted printer.

About a month ago I started a big job and left it overnight. When I woke up, I found that it gone catastrophically wrong almost as soon as I went to bed. There was a blob of plastic around the extruder as big as a golf ball. I cleaned it up as best I could and went back to printing. It seemed fine, ...
by Jason M Bryant
Fri Feb 27, 2015 9:14 am
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

This is very strange. The area that's having a problem is thicker than .2mm. It should be able to print. I'm sure I could keep thickening that place until it works, but this seems like a problem with your slicer.
by Jason M Bryant
Thu Feb 26, 2015 4:11 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

What resolution are you printing at? .2mm?

What size is the part. 100%?

Thanks.
by Jason M Bryant
Sun Feb 22, 2015 3:31 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

I agree, screws can be a pain. I had to get someone to order them online for me, since they aren't really sold in hardware stores here in China. I tried to think of a design that could add more tension to the wires without screws, but the limits of what you can print made the designs too large and u...
by Jason M Bryant
Fri Feb 20, 2015 8:50 am
Forum: Hands
Topic: Fill when printing
Replies: 12
Views: 2104

Re: Fill when printing

I'm planning on doing some tests on shells vs infill. I've already developed a rig and I ran the tests on PLA that was dipped in boiling water. I posted those results on the google groups page.

I'll try to get started on the new tests soon.
by Jason M Bryant
Thu Feb 19, 2015 1:53 am
Forum: General R&D
Topic: Progress on new tensioner box: Paperclip based Gripper Box
Replies: 6
Views: 1903

Re: Progress on new tensioner box: Paperclip based Gripper Box

Now for a quick tribute to iterative design.
by Jason M Bryant
Thu Feb 19, 2015 12:26 am
Forum: General R&D
Topic: Progress on new tensioner box: Paperclip based Gripper Box
Replies: 6
Views: 1903

Re: Progress on new tensioner box: Paperclip based Gripper Box

Haha, don't worry about it. The only reason I had time to make these things in the first place is my university is on a break for the winter. All the students left town, and suddenly I was productive! I've finished version 2 of the Gripper Box, which uses the wheel-less snap pin design in my second ...
by Jason M Bryant
Wed Feb 18, 2015 9:04 am
Forum: General R&D
Topic: Progress on new tensioner box: Paperclip based Gripper Box
Replies: 6
Views: 1903

Re: Progress on new tensioner box: Paperclip based Gripper Box

Next experiment, using the snap pins as wheels. Snap pins are back, but this time the holes for them are completely round. Thus, the snap pins can spin, and there is no need for wheels. Theoretically. Printed at .2mm, they don't spin. These are at 100%, so a bigger scale would have more tolerance an...
by Jason M Bryant
Wed Feb 18, 2015 4:51 am
Forum: General R&D
Topic: Progress on new tensioner box: Paperclip based Gripper Box
Replies: 6
Views: 1903

Progress on new tensioner box: Paperclip based Gripper Box

I like how my Gripper Box works, but I'm still looking for improvements in size and simplicity. The next experiment is using a paperclip instead of snap pins. This eliminates the need for wheels, since the smooth metal will hold up fine against the wire rubbing against it. Basically, the cap, base, ...
by Jason M Bryant
Mon Feb 16, 2015 1:34 pm
Forum: Hands
Topic: Help needed with resizing a hand
Replies: 3
Views: 987

Re: Help needed with resizing a hand

Having done a bit more work on the problem, I think I've got something that works. I scaled the hand and gauntlet in X without changing the Y. Since the hand is thumbless, that doesn't mess up any of the hinges. It's not quite as good as being able to custom move the wrist hinges. I still feel like ...
by Jason M Bryant
Mon Feb 16, 2015 6:12 am
Forum: Hands
Topic: Help needed with resizing a hand
Replies: 3
Views: 987

Help needed with resizing a hand

I recently made a Raptor Classic for a recipient. Since he's a fairly tall adult, I made it at 173%. Because he lost his fingers in an accident and then had surgery on them, his hands are an odd size, and the first gauntlet I made didn't fit. His hand is much thicker than normal, so I thought the Ra...
by Jason M Bryant
Mon Feb 16, 2015 2:19 am
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 3657

Re: Tensioners

Well, this is excellent timing, since I just posted a new tensioner that needs testing! http://www.thingiverse.com/thing:683357 This is the Grip Balance Box, a replacement for the tensioner on the Raptor Reloaded. It takes a little more effort to wire up, but it gives the hands adaptive grip. Instru...

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