A controller for operating a stepping motor to a resolution defined by plural inter-pole motor positions includes a digital processor for communication with an external host system for controlling operation of the stepping motor, at least in a microstep mode. The processor selects Sine/Cosine driving...http://www.google.es/patents/US5359271?utm_source=gb-gplus-sharePatente US5359271 - Microstepping bipolar stepping motor controller for document positioning
Microstepping bipolar stepping motor controller for document positioning
