While I was inpatient at Sacred Heart Medical Center in Eugene Oregon, in February of 2019 suffering from a blood infection and eventually having my ring and pinky finger amputated from my left hand. I had my family bring up one of my 3d printers so that I could start prototyping prosthetic devices while I was living in the the hospital. at the same time I was also learning how to write with my right hand as I was left hand dominant. one of the first devices that I was investigating was a mount that let the user affix small hand tools to the palm of their residual hand and use the tools and with a twist of the locking ring change to a different tool.
A video of an early prototype can be viewed at https://youtu.be/KOTfNJu3Vu8
the design has gone through many revisions in the time that I’ve been working on prosthetics.
This was a project that I Designed and built out of a need to use an impact driver. When you are missing fingers it becomes incredibly difficult to do simple things like drive screws with an impact driver. usually you hold the driver with one hand while the other places and guides the screw. well without a second hand you have nothing to hold the screw.
This was a build request from one of my You Tube subscribers that is part of the missing parts club. this mod presses the L1 and L2 buttons on the controller. by pressing the 12m tactile buttons on the side of the controller, the micro servos depress the factory controller buttons. the potentiometer on the front varies the button press cycle time if the rapid fire mode is turned on.
This project was also a You Tube subscriber request. it is a forearm mounted retractable electric chainsaw. I was using it as a filler project while I was struggling on reworking finger designs, every so often I revisit working on it. being that it has no viable real world application it is pretty low on my completion schedule. eventually, but not right now. Sorry all you Evil Dead fans.