FOUR_PHASE_STEPPER_DRIVE_EXCLUSIVE

Published:2009/7/7 1:54:00 Author:May | From:SeekIC

OR gates of 7486 provide steering, while 7476 flip-flops provide memory for generating drive patterns of bidirectional logic stepper motor that is controlled by microprocessor. Output transistors, diodes, and resistors are chosen to meet power requirements for each phase of motor. Speed is controlled by frequency of clock input. Use 555 for coarse control or crystal oscillator for accurate control. S1, which can be an I/O line of microprocessor, controls direction of rotation. Frequency can be obtained from digitally controlled oscillator whose setting is determined by DAC.-R. E. Bober, Taking the First Step, BYTE, Feb. 1978, p 35-36, 38, 102, 104, 106, and 108-112.



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