I make a remixed version of Tri Max Gripper inspired by FESTO FinGripper.
The original file are owened by Chiprobot ( http://www.thingiverse.com/thing:193851 )
My revision add a palte to connect a NEMA 17 stepper motor, a new support to connect the finger that use a M5 nut and M5 screw directly connect to nema.
Many thank's to Chiprobot because he have shared him STL files.
Delta Kossel K250 home made