Mechaduino is a board that sits on a regular stepper motor and turns it into a servo with a closed loop control of 0.1degree ... they’ve promised. he Arduino-sounding bit of the name comes ...
The purple boards slotted into the pairs of SIL headers are Pololu Stepper motor drivers ... (two for each axis), spindle and coolant control, as well as three buttons for pause, resume, and ...