This project is Open Source Hardware certified : [OSHW] FR000008
A joint University of Bath and Grenoble INP project in which an electronically assisted prosthetic hand was designed for a person who had lost their fingers but had some of their palm remaining.
The project was carried out with help from members of team Gre-Nable and the e-Nable community. The project has been OSHW certified and to understand more about the project and its key developments for the community, more can be read in this article:
The prosthetic is made of two materials, ABS/PLA for the hard shell of the hand a gauntlet and Ninjaflex for the internal bone of the fingers and thumb. All CAD models for the prosthetic were developed on the open source software On-Shape and can be accessed here: https://cad.onshape.com/documents/15971390cd96deba2412303e/w/515c26e2e8a49867cd2c31d1/e/5e2ac7d52c7ee5494f4c064c
The fingers are contracted with the use of fishing wire which are attached to servo motors. The user controls the servo motors with the use of a joystick located inside the palm.
A pressure sensor was implemented into the finger tip of the index finger which controlled small vibration motors in the gauntlet depending on how large a grip force on the object was being achieved.
For more information on the development of the prosthetic look through this google drive:
Appendix W include links to all the additional parts used to create the prototype.
This project is available for everyone to recreate and improve upon for the benefit of the wider e-Nable community.
These settings were used to print all parts that were made out of ABS or PLA. The parts labelled finger bones were printed in the material Ninjaflex. The settings for this were:
Printer - P3 Steel
Material - Ninjaflex
Resolution - 0.2mm
Infil - 20%
Print Speed - 20mm/s
Raft - No
Supports - No