Search found 38 matches

by john.diamond
Fri Feb 05, 2016 1:49 am
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 3137

Re: Cosmetic Terminal Devices

I've identified why the thumb won't close and it's not the pivot hole position as that's OK. There's a small protrusion from the side of the slot into which the thumb is placed and I've ringed it in red in the first photo. The other photos show the fully assembled hand with the castrating band and r...
by john.diamond
Wed Feb 03, 2016 9:21 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 3137

Re: Cosmetic Terminal Devices

I've printed the cosmetic gripper hand and it took 14:41 on my RepRap. I'm not sure the thumb hinging is correct as it only closes as far as shown in the photos. The thumb has very little range of movement and can't touch the fingers. The hand looks very lifelike and I'm sure can be adjusted to work...
by john.diamond
Thu Dec 24, 2015 2:29 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Here's my design for a thermoformed palm mesh that can be attached to the latest version of the Phoenix palm using small countersink head sheet metal screws. For a 125% palm I used 3/8" #4 screws. For a 140% palm I used 1/2" #6 screws. This is a right hand palm so you'd need to produce a m...
by john.diamond
Mon Sep 28, 2015 7:17 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I completed the basic build of the Osprey using bracer version2.52 but haven't yet added the leather and nylon strapping. This a 145% build using 1.6mm nylon monofilament fishing line. I displayed it at the two day World Maker Faire in New York at the weekend and it was handled by many attendees dur...
by john.diamond
Thu Sep 17, 2015 2:24 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I actually used the 'A' set for the initial build but now believe that was the wrong choice. When I get time on my printer next week I'll try the alternative settings to see which one fits best.
by john.diamond
Thu Sep 17, 2015 2:05 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Just checked the wrist pins and they are clicked in firmly. They can still slide in and out of the cap by about 0.5mm but the end of the pin is properly engaged. I'm probably going to wait till I reprint the bracer using the newly posted smooth design before moving on to adding the leather and nylon...
by john.diamond
Wed Sep 16, 2015 8:06 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I've installed the 1.6mm monofilament fishing line into my 145% Osprey and it's operating without any perceived friction. Here's how it looks:
Osprey2.jpg
Osprey2.jpg (174.94 KiB) Viewed 6496 times
Osprey3.jpg
Osprey3.jpg (123.48 KiB) Viewed 6496 times
Osprey1.jpg
Osprey1.jpg (169.13 KiB) Viewed 6496 times
by john.diamond
Wed Sep 16, 2015 5:32 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

It'll probably be next week before I can download and try the new bracer. I'll also be trying the alternative fit settings for the proximals/pins. I need to dedicate my printing time right now to getting ready for a presentation that Justine and I will be giving on Sunday. The 1.6mm monofilament nyl...
by john.diamond
Mon Sep 14, 2015 5:16 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

All the supports were able to be broken away relatively cleanly either manually or using pliers. I then used a file and a heated tool to smooth off the remaining rough spots. I'm beginning to think I may have used the wrong technique to determine which fit setting (A-D) would be most appropriate. My...
by john.diamond
Sun Sep 13, 2015 6:25 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I'm a couple of hours away from having the fingertips reprinted. I didn't like my filament choice for the first attempt and have opted to change filament before the main assembly. I'm using the A sizing as the B was definitely too tight given my extruder settings. In the distals there are two identi...
by john.diamond
Thu Sep 10, 2015 11:31 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I see the hexdistals (fingertips) have been provided with substantial supports under the curved overhanging section. I assume this is because you've had trouble maintaining print quality in this area given that the overhang is greater than 45' from vertical. I've had similar problems with the Raptor...
by john.diamond
Thu Sep 10, 2015 1:44 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 7245

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I'd like to volunteer to join the beta testing of the Osprey. I propose printing a 145% scale hand in PLA on my RepRap I3XL. What's the status of the design right now? Should I take the published STLs or wait for an update? Ideally, I'd like to have it ready to take to the World Maker Faire in New Y...
by john.diamond
Wed Aug 05, 2015 10:01 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 7855

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I've attached and archive containing the STL and OpenSCAD source files for the modified reverse dovetail gripper box and whippletree components that I discussed during the Monday 3rd August R&D hangout.
by john.diamond
Fri Jul 10, 2015 2:32 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've attached a ZIP containing the redesigned whippletree and swivel pin components that I've been using. Note the there's a little bit of support structure that needs to be trimmed off the swivel pin before it can be used.
by john.diamond
Mon Jul 06, 2015 6:30 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've just started printing another 145% Phoenix and will download and use the latest fingertips and report back.
by john.diamond
Thu Jul 02, 2015 11:46 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've got another demo hand to print after this one so I'll try the new fingertip designs to see how I get on with them.
by john.diamond
Thu Jul 02, 2015 6:29 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've printed the fingertips that I downloaded on 6/22 at 135% and 145% and the Lee Tippi size 3 fit well on both. On the topic of finger tip printing problems I ran an experiment to overcome some issues that encountered yesterday trying to print a short fingertip at 145%. I was using a reel of filam...
by john.diamond
Mon Jun 29, 2015 3:15 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've successfully printed the Phoenix V5 design (new palm and finger/thumb phalanx designs). There were no printing problems worth noting. Once again, I used the STRAP thermoformed gauntlet instead of the Phoenix version. The scale factor was 135% and all the printing parameters were as before with ...
by john.diamond
Sat Jun 27, 2015 1:20 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

My modified whippletree and swivel pin assembly seems to be working well. It's behavior seems indistinguishable from the original version ... just without the added assembly step of lacing the two together with wire/cord.
by john.diamond
Fri Jun 26, 2015 11:03 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

On my 135% Phoenix I use 6.5oz bands and I'm finding that 3/8" bands on the knuckles and 5/16" on the finger/thumb tips work as you describe. The fingers/thumb stay straight until either the phalanx reaches the limits of their travel before the tips start bending.
by john.diamond
Wed Jun 24, 2015 7:00 pm
Forum: Beta Testing
Topic: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED
Replies: 39
Views: 14402

Re: Thermoformed Raptor Reloaded Gauntlet: FEEDBACK/TESTING REQUESTED

I've printed the STRAP V3 at 135% and used it in combination with Jason Bryant's Phoenix V4: IMG_1711.JPG The gauntlet was easy to print ... much quicker than the traditional 3D design and printed cleanly on my RepRap which struggles with the long Velcro strap slots. The thin section in front of the...
by john.diamond
Wed Jun 24, 2015 3:21 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

The only significant issue I had with the V4 was the thumb knuckle pin and hole in the phalanx. When first inserted the pin clip end got crushed and the joint was stiff. I drilled out the hole and the thumb now moves freely. I know there's a new version of the phalanx designs in V5 so I'll give thos...
by john.diamond
Wed Jun 24, 2015 3:18 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've printed the Phoenix V4 at 135% using the following printer configuration: I3XL (from DIY Tech Shop ... Based on Prusia i3 with 12" x 9" heated bed) slic3r using 0.2mm layers, 3 layers top and bottom and 3 perimiters, 35% honeycomb fill I replaced the gauntlet with a thermoformed alter...
by john.diamond
Tue Jun 23, 2015 7:02 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Jason, you asked how I was slicing ... I use slic3r with a 0.2mm layer height, 3 layers top and bottom and 3 perimeters. I've been able to improve my print qualities recently by dropping by bridging speed from 60mm/s to 40. I've also found the cooling setting that allows the fan to run full blast fo...
by john.diamond
Tue Jun 23, 2015 3:46 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Justin, your print quality looks excellent. Even the gauntlet seems to be crisply printed with no obvious problems on the Velcro strap slots. I also like you color scheme.
by john.diamond
Mon Jun 22, 2015 2:53 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I printed the v4 left palm with supports yesterday evening and wanted to mention an anomaly that I saw on the v1 palm as well. There's a partial hole in the top surface over the thumb tendon channel that I've ringed in blue below: PhoenixV4a.png I would like to mention that the new full height suppo...
by john.diamond
Thu Jun 18, 2015 10:09 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've just been given access to the photos from the Monday evening iMakr meetup in New York City. These photos were taken by a member of the audience, Michael Del Rossi, who is a professional photographer. They can be viewed at https://www.behance.net/gallery/27166485/iMakr-meetup-2015 . The purple h...
by john.diamond
Wed Jun 17, 2015 3:07 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I'm very much looking forward to seeing the results. The reaction of the audience at the Monday evening event in New York when Jon showed them the Phoenix was overwhelming.
by john.diamond
Wed Jun 17, 2015 2:45 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I finally got around to printing the full height support test structure and all the walls came out intact. I think this is the correct approach. Thanks Jason. Would you like any test prints of V2 produced or should we wait for V3?
by john.diamond
Mon Jun 15, 2015 5:11 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Regarding the issue I ran into with the thumb knuckle joint, I believe, although can't be 100% sure, that the problem was with the roof of the joint on the palm where there are bridging strands. My printer isn't too clever when it comes to bridging gaps and this could be the reason I had to scrape o...
by john.diamond
Mon Jun 15, 2015 2:58 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I did notice a couple of points that might be worth following up on during the final assembly. 1) My printer had a bit of a struggle forming the roof of the thumb knuckle joint on the palm. The result was that before I scraped it out using a 1/4" chisel the joint didn't move freely. 2) The thum...
by john.diamond
Mon Jun 15, 2015 2:47 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Success! I've finished assembling and stringing the Phoenix (135%) using the new gripper box and a thermoformed gauntlet rather than the traditional version. I've included a couple of photos below and Justine is posting a video that we just made showing how the new design is vastly superior in terms...
by john.diamond
Sun Jun 14, 2015 9:21 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Please go ahead and upload the modified support structure. I'll give it a test printing at 135%.

I've just finished all the printing and can confirm that my best quality fingertips were printed with the heated bed turned off as you suggested.

I'll upload photos of the finished hand ASAP.
by john.diamond
Sun Jun 14, 2015 2:04 pm
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

At 135% the support walls are one bead of filament thick. The walls on the first generation dental band palm seemed a fraction thicker and held up better. Even though full height support walls take a little more filament and printing time I'd suggest it would be worthwhile to improve the predictabil...
by john.diamond
Sun Jun 14, 2015 2:37 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I've been having problems with print quality resulting in irregularities and roughness on the upper side (lower side during printing) of the finger and thumb tips. This isn't unique to the latest design ... I've had the same problems with the Raptor and Raptor Reloaded as well. I believe I now know ...
by john.diamond
Sun Jun 14, 2015 2:16 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

Here are some observations from my test printing at 135% using an i3xl (RepRap design based on a Prusa i3 with a 12" x 9" heated bed and twin ducted fans on the printhead). I used 0.2mm layers and 3 perimeters. The first attempt at printing the palm resulted in a layer slippage at an eleva...
by john.diamond
Thu Jun 11, 2015 12:06 am
Forum: Beta Testing
Topic: The Phoenix Hand (previously Eagle Hand) fabrication and mechanical function testing
Replies: 165
Views: 36530

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

I see Iain volunteered to print at 140% so I'll switch to 135%.

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