STEP MOTOR CONTROL CIRCUIT

摘要

PURPOSE:To realize a microstep system step motor control circuit having simpler constitution than a conventional circuit employing exclusive use ICs at lower cost. CONSTITUTION:A timer 14 controls a pointer 12 to designate a reload register 11 which then delivers a duty value for controlling a PWM(pulse width modulation) circuit 13. A current driver 19 is controlled by modifying the duty ratio of output waveform to produce a waveform for each phase in microstep system.