DRIVE CONTROLLING METHOD OF OBJECT TO BE CONTROLLED BY STEPPING MOTOR

摘要

PURPOSE:To satisfactorily control positioning for stably pressing a target to an object to be controlled by continuously exciting next phase of an exciting phase when a stepping motor is stopped. CONSTITUTION:A rotating speed is always monitored and detected by an absolute encoder 4. When an object W to be controlled is contacted with a target, a rotating speed abrupt detector 2c outputs a speed abrupt change signal (f). A program controller 2a outputs a lead angle command signal (g) in response to signals (c), (f). A distributor 2b outputs an exciting phase selection signal (d) for continuously exciting next phase of the phase excited on the basis of a rotor position signal (b) when a motor 3 is stopped. The motor 3 generates the prescribed rotary torque by this excitation to stably press the object W to the target without hunting.