Search found 33 matches

by Skip Meetze
Sat Sep 17, 2016 5:50 pm
Forum: Hands
Topic: Low Profile Gripper Box
Replies: 6
Views: 1538

Re: Low Profile Gripper Box

Well done Jacquin! This is an interesting alternative to the whippletree for adaptive gripping and I like it! I look forward to hearing from your beta testers.
by Skip Meetze
Mon Apr 04, 2016 3:15 pm
Forum: Terminal Devices/Tools
Topic: e-NABLE Prosthetic Emulator for evaluating Terminal Devices
Replies: 0
Views: 900

e-NABLE Prosthetic Emulator for evaluating Terminal Devices

The e-NABLE Prosthetic Emulator straps onto the arm of an able-bodied person to allow evaluation of upper limb prosthetic Terminal Devices (TDs). It can be an aid to clinicians when they train the amputee in the use of a prosthesis. It also is useful to designers as a testing device for experiencin...
by Skip Meetze
Sun Feb 21, 2016 11:47 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Re: Cosmetic Terminal Devices

Uploaded new design for TD: My thanks to Peter Binkley for the idea to print (using support) with the edge of the palm against the bed of the printer for controlling the grain in the fingers. ⋅ Not yet printed, but wanted to share for others to test. ⋅ Wrist pivots to flex and e...
by Skip Meetze
Tue Feb 16, 2016 10:46 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Re: Cosmetic Terminal Devices

TD demo video.png
TD demo video.png (1.43 MiB) Viewed 1596 times


Take a look at the video of the Terminal Device in action.
https://drive.google.com/open?id=0B3VhDqFhSJU9b2ZvOTcwNGVrZ2dvSVQ1NXJYMFRDdGZSMENr
by Skip Meetze
Thu Feb 11, 2016 6:37 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Re: Cosmetic Terminal Devices

Problem: The 2-Parts of the cosmetic hand designs are coming off of the printer with a bow in the middle due to normal stresses of parts of varying thickness during cooling. Attempts at softening the parts to thermoform them flat resulted in uncontrolled shrinkage so the parts no longer matched. Po...
by Skip Meetze
Mon Feb 08, 2016 9:12 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Assembly experiments with the cosmetic hands:

⋅  Thermoforming one part of the cosmetic hand to get it to fit precisely with the other is a bad idea! The part shrinks in an uncontrolled way and the fit is likely to get worse rather than better. ⋅  Solvent bonding the 2 flats together (with pegs and the screw for alignment) ...
by Skip Meetze
Fri Feb 05, 2016 7:09 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Cosmetic Terminal Devices also work for Transhumeral arm systems

In addition to the Modular Training Arm http://forums.e-nable.me/viewtopic.php?f=8&t=232 (a transradial elbow-powered arm), another application of Cosmetic Terminal Devices is for Transhumeral Modular Arm systems and the two systems can share much of the same technology. The Haiti Team is active...
by Skip Meetze
Fri Feb 05, 2016 1:03 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Re: Cosmetic Terminal Devices

Thanks John! Looks like a successful proof-of-concept to me! Congratulations!!!! Let me point out that this was the 2-Part Gripper Thumb 1.3 set. I am updating the sticky posting at the top of this forum with v 1.5. My friend Dower Chin and his son Isaac have successfully printed the 2-Part Cosmeti...
by Skip Meetze
Mon Feb 01, 2016 9:59 pm
Forum: Arms
Topic: Cosmetic Terminal Devices
Replies: 9
Views: 1726

Cosmetic Terminal Devices

Cosmetic Terminal Device Notes Updated: 7 February 2016 Sunday At the Autodesk Summit in January, the Bay Area e-NABLE designers recognized that ⋅ The appearance requirements for hands and arms will vary from region to region around the world. ⋅ The psycho-social function of an ...
by Skip Meetze
Thu Jan 14, 2016 9:04 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Thanks Drew. That looks terrific! I will experiment with that next week if all goes well. I haven't had much experience with gorilla glue. We are always going to need to fabricate devices that are too big for the printer bed and developing some processes to deal with that is vital. Here's a little c...
by Skip Meetze
Wed Jan 13, 2016 11:55 pm
Forum: Myoelectric
Topic: Simple Hand Design (KISS Hand)
Replies: 8
Views: 1718

Re: Simple Hand Design (KISS Hand)

Hi Doug, I think Nate’s prosthetist can probably come up with optional electrodes, but I would love to see what you can come up with! Yes, adding a thumb speed control does sound good for research at your present level of development. However, you may eventually zero in on values that will work over...
by Skip Meetze
Wed Jan 13, 2016 11:30 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Joe Cross, we hope to address your concern about sourcing parts. Right now, we are heading toward a design that requires only printed parts, two kinds of screws and nuts, nylon monofilament, velcro and padding to create the training arm. You have me thinking about a version that eliminates the screw...
by Skip Meetze
Wed Jan 13, 2016 11:17 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Thanks for the kind words Nick. It is nice to hear from you again and we welcome your contributions. The mechanical action of the gripper thumb is almost identical to the functioning of the industry standard Hosmer Hook as demonstrated in Nate's first test (see the video above). Therefore, the force...
by Skip Meetze
Mon Jan 11, 2016 2:21 am
Forum: Myoelectric
Topic: Simple Hand Design (KISS Hand)
Replies: 8
Views: 1718

Re: Simple Hand Design (KISS Hand)

Wow! Doug, I am so glad to see what you have done! Your device is already where I hoped to find myself months from now. Well done! Rather than working on my gripper thumb upgrade, I would prefer to see you continue with your brilliant concept! If you put a 1/2-20 bolt at the wrist, it will fit on th...
by Skip Meetze
Sun Nov 22, 2015 6:20 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Nate and Lusie 2.JPG Lusie and Joe.jpg The Mini Maker Faire in Rocheste r went very well. Lusie and Nate tested the new prototypes there , including the new gripper thumb hand. The terrific news is that Nate can use the new gripper thumb hand with his Hanger prosthetic arm and harness replacing the...
by Skip Meetze
Tue Nov 17, 2015 9:06 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Gripper Thumb Hand 2.0.JPG Experimental RIT Gripper Thumb Hand 2.0: Modular Terminal Device by e-NABLE The Gripper Thumb Hand is a Voluntary Opening (normally closed) Terminal Device (TD) for a prosthetic arm. It is printed flat and then thermoformed so that the 4 fingers are fixed in a flexed grip...
by Skip Meetze
Tue Nov 17, 2015 12:04 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Skriver, I am very pleased to see your photos. You have done an excellent job of fabrication, so you should feel proud of that! Your work makes you one of our early alpha testers where we see if people with diverse types of printers and a range of skills can print and assemble the current level of d...
by Skip Meetze
Tue Nov 17, 2015 11:34 am
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Joe, The training arm will not be ready for beta testing (to see how the training arm works for experienced teams of fabricators/recipients) until after the first of 2016. We are doing alpha testing now to see if people with diverse types of printers and a range of skills can print and assemble the ...
by Skip Meetze
Fri Oct 16, 2015 10:24 am
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Hi Eric, Please contact me at skip dot meetze at gmail dot com for a more extensive conversation. Sounds like you have a good understanding of the printed flat and thermoformed version of the training arm socket that is under development. I agree that the printed flat socket is more likely to fit pr...
by Skip Meetze
Wed Sep 30, 2015 4:11 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Hello Skriver, There is a bit of a learning curve to safely and successfully provide a 3D printed arm to an amputee. The wrist-powered hands provided by our volunteers are fairly easy to learn to make and that is the best place to start. http://www.enablecommunityfoundation.org/get-involved/build-a-...
by Skip Meetze
Fri Sep 18, 2015 8:16 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Instructions for assembling and thermoforming the arm

Some instructional materials have been uploaded to the drive Gripper Thumb Instructions https://drive.google.com/folderview?id=0B3VhDqFhSJU9M3lYOGNHOXBFdWc&usp=sharing Training Arm Instructions https://drive.google.com/open?id=0B3VhDqFhSJU9SndWV2tZSnZ3U2c Daniel Ashbrook Photos of the Training ...
by Skip Meetze
Tue Sep 15, 2015 12:26 am
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

Status update on the Training Arm: The current design plans for printed flat and thermoformed components in 3 sizes that hopefully will accommodate elementary school kids (Small, Lusie size), teenagers and female adults (Medium, Raj size) and adult males (Large, Nate size). I have uploaded assembly...
by Skip Meetze
Mon Aug 31, 2015 9:45 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

Re: The Modular Training Arm

A handy draft of the modular components being considered for the Training Arm can be found here https://drive.google.com/open?id=1piJGT ... Pny2wb1IB4
by Skip Meetze
Mon Aug 31, 2015 9:28 pm
Forum: Arms
Topic: The Modular Training Arm
Replies: 23
Views: 4761

The Modular Training Arm

The Training Arm is an experimental elbow-actuated assistive device that is being developed by e-NABLE R&D volunteers to be fabricated using 3D printing technology. The modular design will “fast-track” through the testing process in order to quickly develop an arm design (with limited utility) t...
by Skip Meetze
Tue Jun 23, 2015 12:43 pm
Forum: General R&D
Topic: DaVaHaG - Dynamically Variable Hand Grip tension box
Replies: 7
Views: 1983

Re: DaVaHaG - Dynamically Variable hand Grip tension box

This is quite a breakthrough! Well done! The large cams might not be an issue in a modular arm. I look forward to following up with you on that.
by Skip Meetze
Tue Jun 09, 2015 10:21 am
Forum: Arms
Topic: Bloom Socket: First Prototype, Design and Usage Feedback Requested
Replies: 6
Views: 1268

Re: Bloom Socket: First Prototype, Design and Usage Feedback Requested

For the Monette Modular Arm (soon to be published in the forum) we are connecting the modular elements using the O&P standard 1/2-20 (1/2 inch fine thread, M12 fine thread outside the US). We are thermoforming to capture a nut or bolt in a printed-in hexagonal recess. Perhaps your petals will so...
by Skip Meetze
Tue Jun 09, 2015 9:07 am
Forum: Arms
Topic: Shoulder Harnesses
Replies: 5
Views: 1044

Re: Shoulder Harnesses

Another excellent TEXTBOOK on harness design and function (shared by Jeff Erenstone): Upper­Limb Prosthetics: Harnessing and Controls for Body­Powered Devices Charles M. Fryer, B.S., M.S. Link: http://www.oandplibrary.org/alp/chap06-02.asp PDF on drive: https://drive.google.com/file/d/0B3VhDqFhSJU9N...
by Skip Meetze
Fri May 15, 2015 9:33 am
Forum: Hands
Topic: R&D issue: Where should the knuckles be?
Replies: 4
Views: 972

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

I definitely think you are onto something. At RIT, there is a student with a hand for an arm (as yet unpublished) with this more anthropomorphic knuckle pattern. She uses tiny cylindrical hinge pins and I'm looking forward to trying 1.75mm filament for hinge pins. You might consider filament for you...
by Skip Meetze
Sun Apr 26, 2015 3:40 pm
Forum: Hands
Topic: Rubber Band Raptor Reloaded
Replies: 17
Views: 3525

Re: Rubber Band Raptor Reloaded

Way to go Jason! I'm looking forward to trying this. I liked a lot of things about the fingers from the Falcon Hand when I played with it many months ago (during my pivoting thumb experiments). I abandoned my testing due to difficulty I had in printing the little grooves for the elastics with my pri...
by Skip Meetze
Sat Apr 25, 2015 10:53 am
Forum: Arms
Topic: Monette Socket and Modular Arm
Replies: 1
Views: 743

Monette Socket and Modular Arm

Jeff Erenstone and I have collaborated with members of the RIT Magic Lab team and other members of the community to create the beginnings of a modular arm system where various sockets, terminal devices (TDs), fairings, adaptors, etc. can be interchanged. This is especially valuable in the collaborat...
by Skip Meetze
Sun Mar 22, 2015 10:55 am
Forum: Arms
Topic: Shoulder Harnesses
Replies: 5
Views: 1044

Re: Shoulder Harnesses

Textbook: Harness Patterns for Upper-Extremity Prostheses link: http://www.oandplibrary.org/al/1955_03_026.asp PDF on drive: https://drive.google.com/file/d/0B3VhDqFhSJU9Qy1yRkJPcHpyQTA/view?usp=sharing videos that I found to be informative: Prosthetic Options: Body Powered Prosthetic Hook https://...
by Skip Meetze
Sat Mar 21, 2015 1:02 pm
Forum: Arms
Topic: Raptor Wing
Replies: 23
Views: 5985

Re: Raptor Wing

Nice work Jason! You are the pioneer of the Whippletree! With our terminal device hand, the whippletree worked well with the thumb tendon tied on just proximal to the whippletree and a single cable (made from 1.75mm nylon filament with a crimp). I would be interested in seeing if that works with you...
by Skip Meetze
Wed Feb 25, 2015 9:36 pm
Forum: General R&D
Topic: Tensioners
Replies: 16
Views: 2825

Re: Tensioners

The adaptive grip tensioners are still what we should call “Experimental” designs . Jon Schull has recently proposed an outline of how e-NABLE R & D will advance the designs from Experimental to Beta to Release https://docs.google.com/document/d/1aEUJbP8I0aH_gclCthGiENl8d71HuNqelywjz5dexL0/edit...

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