A system for controlling a stepper motor is disclosed that includes a microprocessor for directly generating current command signals. The microprocessor has a memory wherein the memory includes a function table, a first function table address, and a second function table address. A velocity signal (indicating...http://www.google.se/patents/US6121745?utm_source=gb-gplus-sharePatent US6121745 - Direct current command generation for a stepper motor drive
