Search found 46 matches

by PeterBinkley
Sun Aug 07, 2016 7:22 pm
Forum: Hands
Topic: The Osprey Hand
Replies: 0
Views: 1079

The Osprey Hand

Here it is: http://www.thingiverse.com/thing:910465 This Thingiverse page holds the most recent files and a link to the instructions. Within the instructions document are links to video tutorials. The Osprey Hand was released to the public on July 4th, 2015, and has seen a lot of refinement, both in...
by PeterBinkley
Sun Aug 07, 2016 7:10 pm
Forum: General R&D
Topic: Leather
Replies: 1
Views: 475

Re: Leather

One example of the successful use of leather is the Osprey Hand. http://www.thingiverse.com/thing:910465
A useful tutorial for making a conic bracer is here: https://www.youtube.com/watch?v=u6LIxtjXYRs&index=8&list=PLBHsuyNYSpxvS1EgMP67EszQwgE-Hqq5o
by PeterBinkley
Sun Aug 07, 2016 7:07 pm
Forum: General R&D
Topic: Leather
Replies: 1
Views: 475

Leather

A comfortable, breathable and durable material, leather is an excellent material for making wearable devices. This discussion is to share ideas about the use of leather in prosthetics.
by PeterBinkley
Sun Aug 07, 2016 6:32 pm
Forum: General R&D
Topic: Devices with Bowden Dual-Actuation
Replies: 1
Views: 358

Re: Devices with Bowden Dual-Actuation

The Osprey Hand uses BDA. http://www.thingiverse.com/thing:910465 Here's the assembly manual. The bill of materials is sourced for North America. https://docs.google.com/document/d/1xbfhPYKO-4hcpnAmYpvGPY-vzPpO1QTiwvFZkcN3034/edit?usp=sharing In this case, the nylon monofilament in the instructions ...
by PeterBinkley
Sun Aug 07, 2016 6:20 pm
Forum: General R&D
Topic: Devices with Bowden Dual-Actuation
Replies: 1
Views: 358

Devices with Bowden Dual-Actuation

Please share ideas and source hardware here for Bowden dual-actuation. BDA refers to a mechanism that uses a type of cabling that resists linear compression. Heavy-gauge nylon monofilament seems to currently be the preferred material. The cabling is routed in such a way that it causes joints to actu...
by PeterBinkley
Thu Mar 03, 2016 10:06 am
Forum: Technical Q&A
Topic: Blender Modeling Help
Replies: 6
Views: 1904

Re: Blender Modeling Help

Hey Joe,
Did you get this done? It's almost a year after your first inquiry. If you still want this done, I could do it.
by PeterBinkley
Thu Feb 11, 2016 9:59 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1972

Re: Cosmetic Terminal Devices

Skip, Sorry about the color. I don't have any skin-tone ABS, so I used this neon yellow. I printed with a large brim, which helped control warping, but didn't eliminate it. I used ABS cement (abs+acetone) to glue the sides together. I should have worn gloves. I used a #6 sheet metal screw to squeeze...
by PeterBinkley
Sun Dec 13, 2015 12:54 pm
Forum: General R&D
Topic: Sporting Adaptive Devices
Replies: 3
Views: 996

Re: Sporting Adaptive Devices

Here's a bike-riding device I designed. The user tested it out on a bmx course yesterday. I can't wait to hear back. As soon as I gave it to him, he rode up and down the street a few times and it seemed to work well. It's printed in Bridge nylon for strength and flexibility. It is meant to be worn w...
by PeterBinkley
Sun Oct 04, 2015 6:44 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

John, as for the long knuckle pins, I may end up just having a single very long pin that runs all the way through. I did that with the curved-knuckle Osprey (The Merlin) and it worked great. That way removing the pin is as simple as pushing a chopstick into one end.
by PeterBinkley
Sun Oct 04, 2015 6:39 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Awesome feedback John! If your "C" pins don't fit when you are using "C" proximals, I think I may have calculated for ABS a bit too much. PLA is much more rigid, so bigger gaps are needed to allow the pins to snap in without breaking off. So I may decide to recalculate tolerances...
by PeterBinkley
Mon Sep 21, 2015 2:40 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I identified a couple issues with the new bracer today, fixed them, and swapped in the fixed file. I widened the cable channels and reduced the holes for the flat-headed screws. Everything should work very well now.
by PeterBinkley
Thu Sep 17, 2015 11:32 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

John, I updated the data for your build on this thread's introductory post. Did you use the "B" set of proximals and pins for this initial build? That's what I put down for you, but I'll make changes if necessary.
by PeterBinkley
Thu Sep 17, 2015 1:38 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Oh wow John, that looks great. Well done sir. It looks like the wrist nut might not be all the way on. The wrist pins should really snap into place in those nuts. If the base of the nuts have a bit of a brim, you might need to sand them down to make them seat properly. Squeezing the first print laye...
by PeterBinkley
Wed Sep 16, 2015 11:17 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

My own test prints were successful, so I just added the remeshed bracer to the Thingiverse page. Let me know what you think.
by PeterBinkley
Mon Sep 14, 2015 6:15 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I updated the announcement on the first page to reflect the data I've received so far. Let me know if I missed anything. John, if by "sloppy" you mean wobbly, you should be using a higher letter, not a lower one. When selecting a tolerance, the rule is "Lower Letters are Looser"....
by PeterBinkley
Mon Sep 14, 2015 5:46 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Laird, I'm so glad you're enjoying the Osprey Hand. I have a question and a suggestion. I'm assuming you used the Ultimaker Original+ for all the Ospreys you've printed. For the 150% build in Taulman 910, which tolerance set did you use for the pins and proximals? I'm guessing the "B" set ...
by PeterBinkley
Mon Sep 14, 2015 4:42 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

John, thanks so much for giving the Osprey a whirl! I'd suggest printing the new bracer/gauntlet when I publish it, which will be in the next couple days. It's coming along nicely. I think the rest of the design is stable, at least until my might beta testers identify a problem. This design should p...
by PeterBinkley
Mon Sep 14, 2015 4:41 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Drew, hold off printing the bracer for a day or two. I'd like you to see the new model so you can choose which one you like better.
by PeterBinkley
Thu Sep 10, 2015 5:14 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

I just updated the bracer on Thingiverse. The cable channels are now quite a bit wider. So it should work very well now. I'm also working on a remesh of the bracer that's much smoother. So I think the original bracer will end up on the Gamma Raptor, since it has the same "faceted" aesthetic.
by PeterBinkley
Fri Sep 04, 2015 1:58 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Awesome Laird! I took note that you had to widen the channels in the gauntlet for the cables and made them 10% wider in the model. I haven't published the changes yet as I'm working on a major remesh of that component. I'd like to turn the mesh into quads so I can smooth it with a subsurf or a massi...
by PeterBinkley
Mon Aug 17, 2015 1:50 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Laird, Here's the method for installing nylon monofilament in the fingers: https://www.youtube.com/watch?v=cji0p_DsGxo Did you find the support material hard to remove from the proximal phalanges? My Flashforge (Replicator 1 clone) handled it fine, but on my Ultimaker 2, the space between the object...
by PeterBinkley
Mon Aug 10, 2015 1:46 am
Forum: Hands
Topic: New Print-in-Place Fingers: Three Phalanges, No Elastics
Replies: 11
Views: 2649

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

Andreas! It's great to see you're trying out thick nylon monofilament. Here's what I'm using these days: http://catchalltackle.com/monofilament-fishing-leader-100yds-1-0mm-2-4mm-w-crimps/ The great thing about the fishing leader is that it's available in a variety of thicknesses. I've made recommend...
by PeterBinkley
Mon Jul 20, 2015 10:40 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand: FEEDBACK/TESTING REQUESTED

Yay Laird!! Thank you so much! Yes, the "A" set of pins and proximals is what I would have chosen for your configuration. Small print scale (100%), PLA (which doesn't shrink as it cools) and an extrusion-heavy printer (Ultimaker) demand the skinniest pin and prox set. Did you find any part...
by PeterBinkley
Tue Jul 14, 2015 10:26 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand Beta Testing

I just updated the palm. The thumb has been turned about 5 degrees to better oppose the fingers. Thanks to Jason Bryant's Phoenix Hand, which showed the benefits of a thumb that more directly opposes the fingers. There will likely be more changes to the palm in the next couple weeks, to further enha...
by PeterBinkley
Mon Jul 13, 2015 12:25 am
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Re: Osprey Hand Beta Testing

I'm not sure what you mean by an open area in the palm. Do you mean an opening for a user with a thumb? You might be able to attach Velcro the same way the nylon straps go on. That is, make a hole in the material and attach the straps with flat-headed screws into the countersunk holes on the undersi...
by PeterBinkley
Sat Jul 11, 2015 3:11 pm
Forum: Beta Testing
Topic: Osprey Hand: FEEDBACK/TESTING REQUESTED
Replies: 31
Views: 5329

Osprey Hand: FEEDBACK/TESTING REQUESTED

Announcement edited on July 14: Hey folks, the Osprey is ready for some beta testing. Are some volunteers willing to help me with this? The files are here: http://www.thingiverse.com/thing:910465 In an attempt to ensure better print quality, I'm not planning to include supportless versions of the Os...
by PeterBinkley
Sat Jul 11, 2015 2:43 pm
Forum: Beta Testing
Topic: Leather Raptor Gauntlet (Both Reloaded and Classic)
Replies: 2
Views: 886

Re: Leather Raptor Gauntlet (Both Reloaded and Classic)

Jason, this is so cool! I like the printed stitching on the wrist hinge attach plate. I'd extend those plates down the arm a few inches. I also really like how thin they are, and how flexible and "form-fitting" they could be, while maintaining strength, because of they print flat. The only...
by PeterBinkley
Mon Jun 01, 2015 1:40 am
Forum: Arms
Topic: Eagle Arm
Replies: 2
Views: 924

Eagle Arm

I'm trying to develop an open-source version of a transradial device, and I'm calling it the Eagle Arm. It would actuate by hunching shoulders forward, which pulls on a "backpack" type harness. A cable would run from the shoulders down a bowden tube and into a socketed glove. Attached imag...
by PeterBinkley
Tue May 26, 2015 10:06 am
Forum: Arms
Topic: Shoulder Harnesses
Replies: 5
Views: 1127

Re: Shoulder Harnesses

Yes Joe, I'm working on a shoulder-powered device I'm calling the Eagle Arm. I'm starting a new thread in R&D.
by PeterBinkley
Tue May 19, 2015 10:52 am
Forum: Technical Q&A
Topic: No Solid Body
Replies: 1
Views: 571

Re: No Solid Body

What files did you download and where did you download them?
by PeterBinkley
Tue May 19, 2015 10:48 am
Forum: Technical Q&A
Topic: Required cord strength
Replies: 2
Views: 755

Re: Required cord strength

Agreed. For braided cable, I wouldn't go any smaller than 50lb for a small child's device, just because of the diameter. The smallest I've used is 80lb, and that was for a two-year-old. Any smaller than that and the cable will saw into the plastic and stick in the groove. For most kids' devices I'd ...
by PeterBinkley
Sun Mar 29, 2015 12:47 am
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 1369

Re: Velcro, leather and foam

LeatherThickness.jpg Leather thickness is usually measured in ounces. Here's a chart to help out, so anyone who reads this can follow. The palm should be about 3mm thick, so about 7oz. If it is hard, get it wet and bend it around vigorously until it's soft. The bracer can be about 4-5oz, so 1.5-2mm...
by PeterBinkley
Fri Mar 27, 2015 6:51 pm
Forum: Technical Q&A
Topic: Blender Modeling Help
Replies: 6
Views: 1904

Re: Blender Modeling Help

How far apart do you need those holes? Teaching you how to select all the right vertices would be tricky in a post, but I'd be happy to fix the model for you. I need to hold some Blender tutorial hangouts.
by PeterBinkley
Fri Mar 20, 2015 1:50 pm
Forum: General
Topic: Introduce yourself!
Replies: 20
Views: 3213

Re: Introduce yourself!

I'm Peter Binkley, and I design and make stuff (mostly wrist-powered devices) for e-Nable. My handle most places is profbink, but there's another profbink out there, so beware! My preferred design software is Blender, and I print on an Ultimaker 2 and a Flashforge Creator Pro. Both are excellent mac...
by PeterBinkley
Fri Mar 20, 2015 1:18 am
Forum: Arms
Topic: Shoulder Harnesses
Replies: 5
Views: 1127

Re: Shoulder Harnesses

Here's a link to a couple shoulder harnesses, just to give you an idea. Can we have some images of harnesses being worn and used?
http://www.ottobock.com.tr/en/prostheti ... 1-21a36-1/
by PeterBinkley
Fri Mar 20, 2015 1:17 am
Forum: Arms
Topic: Shoulder Harnesses
Replies: 5
Views: 1127

Shoulder Harnesses

We have some elbow-driven devices, but users may have more success with a shoulder harness. Here's a thread for a discussion of shoulder harnesses. Please include pictures and instructions when possible.
by PeterBinkley
Wed Mar 18, 2015 1:56 pm
Forum: Hands
Topic: Velcro, leather and foam
Replies: 7
Views: 1369

Re: Velcro, leather and foam

Yeah, we definitely need to move toward leather bracers and palms. They are much more comfortable than Velcro alone. Leather is really easy to use, but has somehow maintained a mystique that people find intimidating.
Have courage, my friends!
by PeterBinkley
Wed Mar 18, 2015 1:52 pm
Forum: Hand-o-matic
Topic: Hand scaling
Replies: 4
Views: 1257

Re: Hand scaling

It's really tough getting a good-fitting device from a rigid model. I'm working toward a flexible bracer (gauntlet) and a wide wrist hinge so that a simple measurement of the residual palm would be enough to make a device. There is a lot of variation in the relative sizes of palms and forearms! Usin...
by PeterBinkley
Tue Feb 17, 2015 8:19 pm
Forum: Hands
Topic: Fill when printing
Replies: 12
Views: 1808

Re: Fill when printing

For small prints, like 100%, I go with 2 or 3 shells, and for larger prints, up to 5 shells. I make infill dense too, except in the fingers, which I usually print with 20% infill. Lightweight fingers respond better to extension, be it elastic or mechanical.
by PeterBinkley
Sat Feb 14, 2015 11:45 am
Forum: Hands
Topic: Bracer; Gauntlet; Sleeve; Cuff; Bracelet
Replies: 11
Views: 2412

Re: Bracer; Gauntlet; Sleeve; Cuff; Bracelet

Disambiguation Technically, a gauntlet is a glove. One wears gauntlets like one wears mittens, but with fingers. A bracer is a garment worn on the forearm. Many e-Nable designs called gauntlets, are actually bracers. So an e-Nable "gauntlet" is worn as a bracer, bracelet, sleeve or cuff. I...
by PeterBinkley
Sat Feb 14, 2015 11:45 am
Forum: Hands
Topic: Bracer; Gauntlet; Sleeve; Cuff; Bracelet
Replies: 11
Views: 2412

Bracer; Gauntlet; Sleeve; Cuff; Bracelet

This is a discussion of bracers, which are often referred to as gauntlets.
by PeterBinkley
Sat Feb 14, 2015 11:23 am
Forum: General R&D
Topic: Cabling: Strings and Things
Replies: 4
Views: 881

Re: Cabling: Strings and Things

These are materials I've used for cabling. 1. Braided fishing line, 80-pound to 250-pound. Dyneema or similar low-stretch material. 2. Landscapers' trimmer line, which is just a very thick nylon monofilament. 3. Deep-sea fishing line, 1.2mm (150-pound) to 2.4mm (600-pound) nylon monofilament line, d...
by PeterBinkley
Sat Feb 14, 2015 11:06 am
Forum: General R&D
Topic: Cabling: Strings and Things
Replies: 4
Views: 881

Cabling: Strings and Things

This is a discussion of different cabling materials and considerations for cable-driven mechanical devices, such as arms and hands.
by PeterBinkley
Sat Feb 14, 2015 11:02 am
Forum: General Getting Started
Topic: Hand Anatomy 101
Replies: 2
Views: 2206

Re: Hand Anatomy 101

Excellent topic. Singulars and plurals of Latin words follow Latin rules of grammar. The singular of phalanges is phalanx, not phalange, just like the singular of vertices is vertex, not vertice. Not meaning to be nitpicky here. I'm not going to interrupt anyone mid-sentence, or at all for that matt...
by PeterBinkley
Fri Feb 13, 2015 6:07 pm
Forum: General Getting Started
Topic: I want to buy a 3D printer
Replies: 17
Views: 5218

Re: I want to buy a 3D printer

Here's one of my favorite links, which compares a bunch of printers in a spreadsheet, listed by cost from low to high:
http://www.3ders.org/pricecompare/3dprinters/
by PeterBinkley
Fri Feb 13, 2015 6:05 pm
Forum: General Getting Started
Topic: I want to buy a 3D printer
Replies: 17
Views: 5218

I want to buy a 3D printer

This is a topic for folks who want to buy a 3D printer. Folks here can make recommendations and share links to printer reviews and comparisons.

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