Human finger model movements DC activated.
Hello good folk
I have been working on some artificial finger extensions and retraction via a DC motor. An H-bridge is used which is connected to a dial switch.
The tendons are braided fishing line. It has proven worthy during the prototype stage.
The advantage of my design is that a single DC motor of servo can control movement and grasping of the entire finger. This design particularly excels when compared to the most advanced models at the moment.... The Shadow hand would be an example. Extremley capable yet the muscle collection to the rear of the hand makes their model obsoliete even before it was created. Much work needs to be done on their model to make it effective.
I apologise for the pics (camera phone) as the detail leaves much to be desired.
This is just a functional model of the unit, so it's not ment to look pretty.
It only purpose is to serve as the concept base as I was trying to get the tendons/joint configuration worked out...
You should notice the holes in each section, the tendon passes within the finger segments within a sheath embedded inside the epoxy segment. The tendon is only exposed at the joints which also need to be finished with a exterior protectant layer.
I am posting these as an example of the funtioning finger. However I would like to post videos at a later date.