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Zachary Archambault
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- Somersworth, NH
- United States
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- What has brought you to Open Prosthetics (check all that apply)?
- Engineer, Volunteer, Interested
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- Helping with projects, Learning more
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I'm really glad that you guys are getting to work on this. If you can also post updates to the wiki page here:
http://openprosthetics.wikispot.org/Updating_the_APRL_Hook
then it will be easier for folks to keep track and contribute.
Also - we've got another project going that involves hook design, in which we're planning on making a couple of updates (like a rubber insert on the outside for holding down paper to write on, eg). Not sure the best way to go about it but I'd like to try to make more hook options modular so that they could be used for models like this and the ETD, that uses the same fingers and attachment method. It seems to me like the attachment method here is one of the things that needs to be fixed, as the APRL seems to break on the attachment boss on the casting.
Anyway, great to see stuff happening here!
Jon
(I'll post this on both of your pages)
Darryl
Thank you again,
Darryl
Thank you so much for your help! As to questions to ask, I believe the biggest one is to the durability of the APRL. I contacted a high end machining company and they said they could make it, but then said it was too costly. I want the shell of the device to be made from titanium, and the threaded part that mates with the arm to be integrated into the milling. that part is currently one of the weakest links of the piece. Otherwise the wear surfaces on the inside need to last longer than 6-8 months.
I understand it may be costly up front, but I have been through a dozen or more over the years. And the parts should be easily changed out, preferably by the user. Therefore needing less down time at some manufacturer.
Right now we need a machinist willing to remake the parts in a stronger material. I have contacted the top 7 or so in the US, with no interest. If you can help I would be grateful.