Applied Science

Microstepping a stepper motor with the SLA7062 (2011x38)

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http://www.techkits.com/kits/index.htm#sla7062 Stepper motors can be made to rotate more smoothly by providing simulated sine waves. The SLA7062 chip uses internal PWM to provide sinusoidal current waveforms to unipolar stepper motors. I have this working fairly well, but the PWM frequency is acoustically apparent and annoying.