Approval

Community driven device approvals.
mfcherfane
Posts: 4
Joined: Thu Mar 16, 2017 11:36 pm

Approval

Postby mfcherfane » Thu Mar 16, 2017 11:50 pm

Hi My name is Michael Cherfane and I am a Junior in high school in New Jersey. I Have been printing hands with my home printer and I finally made one that looks good! I am looking for approval from you. I dont have my velcro straps on in the pictures but they are there. I used used a different method for the tensioner screws. The tensioner screws split the tensioner pins so i glued the screws in and grinded the nuts down so they would spin freely. This seems to work very well! I am printing on a Maker Gear M2 with PlA.
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mfcherfane
Posts: 4
Joined: Thu Mar 16, 2017 11:36 pm

Re: Approval

Postby mfcherfane » Thu Mar 16, 2017 11:55 pm

Sorry I will upload a video soon.

mfcherfane
Posts: 4
Joined: Thu Mar 16, 2017 11:36 pm

Re: Approval

Postby mfcherfane » Fri Mar 17, 2017 2:26 am

Here were go sorry about that
https://youtu.be/_yQtdYzmWqU

Ebubar
Posts: 96
Joined: Wed Aug 12, 2015 10:46 pm

Re: Approval

Postby Ebubar » Fri Mar 17, 2017 2:17 pm

Looks great mfcherfane! Consider this post your virtual approval. Video and pictures were perfect.

The approval badges are being sent out through a website called credly, so you'll need to get an account on there:
https://credly.com/

Once you have an account you can take a screenshot of this post or submit the link for this post into credly to claim your approval badge here:
https://credly.com/claim/101276

Also checkout the enablingthefuture page for getting involved to see what other badges you might be able to get:
http://enablingthefuture.org/get-involved/

Ebubar
Posts: 96
Joined: Wed Aug 12, 2015 10:46 pm

Re: Approval

Postby Ebubar » Fri Mar 17, 2017 2:26 pm

The previous post can be used as your approval. This one is just a few details to improve your next print a little:
1) I'd suggest using a thermoformed gauntlet design. The print quicker, use less filament, are stronger and should result in a cleaner print around the wrist hinge where you saw some weakness. The design you submitted is good for a showoff/demo hand, but I wouldn't give to a recipient as the rough print around the wrist might fatigue and crack with lots of repeated use. A thermoformed gauntlet should fix that little issue.

2) The screws you used are clever. The hand functions well with them, but there are a couple potential issues with your solution for a recipient. a) You want the tensioner screws to be pretty tight and not wobble much when the wrist is bent. With the screw approach you've used, there could be a decent amount of rattling for lack of a better term. b) I like that the tension can be changed without a screw driver, but i'm wondering if a recipient might have more trouble getting things tensioned well themselves with only a single good hand. It would be interesting to test and see if this approach to tensioning might be more effective, but i'd suggest anything going to a recipient would want to have regular screws that bite into the plastic. Avoiding cracking is tricky with the smaller hands. Some ways to avoid cracking are adjusting the printer settings, using smaller screws or softening the holes of the tensioners just a tad with a hairdryer before screwing in. That should help with that problem.

Understand that none of the above should be taken as criticisms or complaints. Your print looks GREAT! They're simply a few suggestions I've used to solve similar issues that I've had in the past. Let me know if you have any questions and thanks for helping Enable the Future!

Cheers,
Eric

mfcherfane
Posts: 4
Joined: Thu Mar 16, 2017 11:36 pm

Re: Approval

Postby mfcherfane » Fri Mar 17, 2017 10:09 pm

Eric, thank you for your reply and it is very helpful! One question. What is a thermoformed gauntlet? could you give me some details on that so I can use it in my next print?

Ebubar
Posts: 96
Joined: Wed Aug 12, 2015 10:46 pm

Re: Approval

Postby Ebubar » Sun Mar 19, 2017 5:04 pm

Checkout this link: http://www.teamunlimbited.org/thermo-form-gauntlet/

It describes what it is and how it works. Let me know how it works or if you have any questions!
Note that you can also use a hairdryer to heat the plastic for thermoforming instead of boiling water.


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