STEPPING MOTOR SLOW-UP CONTROLLER FOR RECORDER

摘要

PURPOSE:To provide a stepping motor slow-up controller with simple constitution and at low cost for a recorder without requiring a exclusive circuit to slow-up the speed of a stepping motor. CONSTITUTION:This controller is equipped with an index detecting means 8 which outputs an index pulse signal (a) by receiving the reflected light of a laser beam emitted from a semiconductor laser 7 on the a polygonal mirror 6, phase shift signal generating means 13-15 setting the index pulse signal (a) as a reference pulse and which generates the phase shift signal of the stepping motor 1, and a driving means 2 which drives the stepping motor 1 by phase shift pulse generated by the phase shift signal generating means 13-15.