(WIP) Prosthetic index finger with servo assisted thumb .
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This is a work in progress and will be updated with pictures, files, code etc as I move through the project.
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Model information
- Source
- Printables
- Category
- RC & Robotics
- License
- Creative Commons — Attribution — Noncommercial
My Mother had to have a finger amputated, all three phalanges and the second metacarpal, due to nerve cancer. A significant portion of the palm and musculature controlling the thumb, adductor pollicis, was also removed because of the depth of the finger amputation. My goal with this project is to replace the finger with a prosthetic (controlled by the middle finger) and to provide some assistive strength to the opposing capabilities of the thumb that were significantly degraded by the loss of the muscle. My intention is to use servo assist controlled by arduino and a flexy variable resistor that will run down the length of the replacement finger. As the replacement finger is bent by the middle finger in a grasping motion the servo will pull the the thumb inwards to complete the ‘grasp’.
‘Luckily’ there is a void where the finger was removed to house a small servo so this could well be a fairly compact build. Lots of work to do with the 3d scanner etc to make it fit comfortably and also working out how the servo will work and the coding etc. This has been my starting point but I have changed so much already that I am not classing this as a remix.
https://www.thingiverse.com/thing:5499514
As things change i will update this thing and publish the code so anybody who needs to can benefit.
materials used so far:
95 shore TPU
PLA+
small woodscrews
1 m3x6 allen bolt