Search found 25 matches

by hertfordkc
Sun Jan 03, 2016 12:12 am
Forum: Hands
Topic: Owen Replacement Fingers
Replies: 0
Views: 640

Owen Replacement Fingers

I just tried to get the files on the Owen Replacement Fingers from the "Devices" tab at enable.org, but some are missing. Jen Owen suggested the link might be here, but I'm not seeing it.
Help please.
Happy New Year e-nablers everywhere.
by hertfordkc
Fri Nov 13, 2015 1:39 pm
Forum: Technical Q&A
Topic: Raptor Reloaded - Tensioner pin screw sizes
Replies: 2
Views: 4364

Re: Raptor Reloaded - Tensioner pin screw sizes

After struggling to find the proper screw size for each hand printed, I've settled on drilling the printed holes to properly fit the #4, #6, and #8 screws. You may need some intermediate drill bit sizes so that the hole can be enlarged in small increments. If the twist drill is too large, the plasti...
by hertfordkc
Wed Nov 11, 2015 1:24 pm
Forum: Technical Q&A
Topic: Shoulder strap
Replies: 1
Views: 727

Re: Shoulder strap

The RIT arm is probably what you need. However, the RIT arm has been withdrawn and is being redesigned. I don't know what its problems were, or when it may be re-introduced. Search the Enable blog site for RIT arm.
by hertfordkc
Wed Nov 11, 2015 1:19 pm
Forum: Technical Q&A
Topic: SLT File
Replies: 1
Views: 609

Re: SLT File

If go to the devices section of Enabling the future, and then to Raptor Reloaded, you can link to the stl files.
For Raptor Reloaded, the following link should get you to the individual files:
http://www.thingiverse.com/thing:596966/#files
by hertfordkc
Thu Nov 05, 2015 9:52 pm
Forum: General R&D
Topic: Cast a part to strengthen it?
Replies: 2
Views: 854

Cast a part to strengthen it?

I just made a few parts with Taulman Bridge nylon. I'm still tweaking the printer settings to improve strength, but expect that de-lamination will continue to be a problem. Has anyone tried making a plaster mold of a part and then heating the mold and the part to ?260C?? Would that approximate injec...
by hertfordkc
Wed Oct 21, 2015 9:55 pm
Forum: Hands
Topic: Hand Project for Class
Replies: 1
Views: 762

Re: Hand Project for Class

1) Finger tips--most office supply stores will have the rubber finger tips. I believe the preferred brand is 'Tippi'. A lot of people to the Plasti-grip stuff that comes in a can, made to coat shop tools. I haven't tried it, but several users have reported that it doesn't wear well. 2) Spare parts--...
by hertfordkc
Tue Oct 06, 2015 7:08 pm
Forum: General
Topic: upstate New York with hand malbormation
Replies: 1
Views: 749

Re: upstate New York with hand malbormation

You need to visit this link:
https://docs.google.com/forms/d/1fIiFAT8KN1qLPu8V9cxNRUPdifSHnGz0scQh4jykYSw/viewform
There are two areas in the community blog that will give you much more information and opportunity to help.
See:
https://plus.google.com/communities/102 ... 6887179986
by hertfordkc
Sun Oct 04, 2015 12:01 am
Forum: Hands
Topic: Any Users Here? Or Success Stories of 3D Printed Devices Like These in Use?
Replies: 2
Views: 953

Re: Any Users Here? Or Success Stories of 3D Printed Devices Like These in Use?

The community blog frequently posts examples of the hands in use. I particularly took note of the young tennis player who did not have to put the racquet aside to toss the ball for service. There are several individuals playing stringed instruments who use Enable hands to hold the bow. And then ther...
by hertfordkc
Sun May 24, 2015 12:23 pm
Forum: Beta Testing
Topic: Palm Mesh
Replies: 14
Views: 4592

Re: Palm Mesh

As a fabricator, I'm firmly in favor of the bolt on mesh. It gives the recipient multiple options and it is much easier to fabricate. My original recipient is content with his Raptor Classic, so I can't add to the user experience for the mesh.
by hertfordkc
Mon May 18, 2015 3:12 pm
Forum: Hands
Topic: Hand-o-matic cyborg beast gauntlet has no tensioner?
Replies: 2
Views: 962

Re: Hand-o-matic cyborg beast gauntlet has no tensioner?

I haven't printed the newer versions of the Cyborg Beast, but if I were about to print, I'd measure the distance between the hinges of the latest version of the bracer and one of the earlier versions. In other words, use the STL from a previous version. If that fails, I'd cut the tensioner of the ol...
by hertfordkc
Fri May 15, 2015 9:33 pm
Forum: Hands
Topic: R&D issue: Where should the knuckles be?
Replies: 4
Views: 1586

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

Jason, Great line of thought. I'm assuming that this would operate in conjunction with a whippletree? As to shape, I don't have an opinion. The current designs cater to the notion that the squared off design would simply answer most of the needs. However, the tapering of knuckles and the squareness ...
by hertfordkc
Wed May 06, 2015 11:34 am
Forum: Beta Testing
Topic: Palm Mesh
Replies: 14
Views: 4592

Re: Palm Mesh

How about more user feedback. Your research seems to bear out that an add-on mesh palm is a great idea. However, I'm still puzzled by my recipient's lack of enthusiasm for the mesh. As I said in the first post, his comment was that it was "less secure", but that may have really been a reac...
by hertfordkc
Wed Apr 29, 2015 11:12 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 8001

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I fitted a Raptor Classic with a Gripper Box for Alex this weekend. He received a conventional Raptor Classic about Jan. 1, so he has it as a backup. I thought that I took several pictures, but botched something. The pictures would have showed him picking up a CO2 cartridge, and holding a trumpet, w...
by hertfordkc
Thu Apr 23, 2015 12:48 pm
Forum: Beta Testing
Topic: Palm Mesh
Replies: 14
Views: 4592

Re: Palm Mesh

Peregrine,
At the end of the day, doesn't your go-to hand have just a "heavy" leather palm? Or is it a mesh palm lined with leather? Are there circumstances where you might recommend the lined mesh over leather only and vice versa?
by hertfordkc
Fri Apr 17, 2015 12:07 am
Forum: Beta Testing
Topic: Palm Mesh
Replies: 14
Views: 4592

Palm Mesh

I fastened a deformable PLA mesh to the palm of a Raptor Classic hand with a standard gauntlet. The tester rejected it because it wasn't as secure as his preferred model, a Raptor Classic with Velcro palm and an extended gauntlet. To draw some conclusion about the usefulness of a mesh for this teste...
by hertfordkc
Sat Apr 11, 2015 11:03 am
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 8001

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

My suggestion for adaptive/non-adaptive fingers was based only on my observation of the hand working with non-adaptive fingers to carry a lunch pail or a grocery bag, picking up small pieces of candy, all of which work, and trying to hold a trumpet, which a recipient specifically requested, which do...
by hertfordkc
Fri Apr 10, 2015 5:01 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 8001

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

I found two or three things that were affecting the flexibility: One elastic over tightened, left two fingers tightened more than right two fingers, perhaps a sticky joint. I'm going to play with it some more. It does appear to meet one of the recipient's criteria: the hand can hold a trumpet. In o...
by hertfordkc
Thu Apr 09, 2015 7:00 pm
Forum: Beta Testing
Topic: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED
Replies: 33
Views: 8001

Re: Gripper Box 3.0: FEEDBACK/TESTING REQUESTED

Jason, I finally got around to rigging the Raptor Classic and Extended Gauntlet with the files which you so promptly provided. Thanks again. While there is some adaptive grip, it is not working as I feel it should. I printed at 133%, and everything looks great. However, when testing the grip, the wh...
by hertfordkc
Tue Mar 17, 2015 11:36 pm
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 2041

Velcro, leather and foam

I've not seen any posts comparing different methods of securing the device palm and bracer. I'd guess that Peregrine Hawthorn's Talon arrangement would be a clear winner for carrying buckets and lifting weights. Has anyone tried to confirm this. If so, why isn't leather - velcro recommended for all ...
by hertfordkc
Sun Feb 22, 2015 12:03 am
Forum: General R&D
Topic: Extended Bracer
Replies: 1
Views: 696

Extended Bracer

The V1 Raptor included an extended bracer. No indication of when to use it. From the printer/assembler view point: Pros: More positive, fixed attachment, less likely to slip under load. More efficient mechanical connection to palm. Stronger? Cons: Bulkier, cosmetic factor? One recipient definitely p...
by hertfordkc
Sat Feb 21, 2015 11:49 pm
Forum: General R&D
Topic: Swiss Army Hands
Replies: 6
Views: 2313

Re: Swiss Army Hands

This makes all kinds of sense to me. More than anything, we should respond to the suggestions of the end users of the designs. One thing that has slowed me down is lack of an attachment mechanism which is indifferent to scale factors. For example, a bottle opener can be the same size whether the han...
by hertfordkc
Sat Feb 21, 2015 11:33 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 4412

Re: Tensioners

I don't like the tensioners using tiny screws into tiny pieces of plastic. The right size screws can be hard to find in the boonies (a lot of places), and strip out of the smaller designs. I'm really interested in the designs by Steve Woods, Skip Meetze, and Jason Bryant. However, I'm not seeing any...
by hertfordkc
Tue Feb 17, 2015 6:20 pm
Forum: Hands
Topic: Fill when printing
Replies: 12
Views: 2496

Re: Fill when printing

I generally print with 3 shells and 40%. The gauntlet deserves a bit more infill. With some slicers (maybe all), you may create voids when the number of shells approaches the width of the object. This can be rectified by changing the number of shells and increasing the infill. I ran into this in the...
by hertfordkc
Tue Feb 17, 2015 12:25 am
Forum: Hands
Topic: Bracer; Gauntlet; Sleeve; Cuff; Bracelet
Replies: 11
Views: 3261

Re: Bracer; Gauntlet; Sleeve; Cuff; Bracelet

Works for me.
by hertfordkc
Tue Feb 17, 2015 12:22 am
Forum: Hands
Topic: Help needed with resizing a hand
Replies: 3
Views: 1169

Re: Help needed with resizing a hand

Jason, I had a recipient whose wrist was as wide as his palm, and the palm was relatively short compared to the classic Raptor design. The scaling was 125% for the width of the palm and 115% for the length of the palm. In order to assure clearance for the working of the fingers, their width was 125%...

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