A.K. Karnal is a scientific officer with the Raja Ramanna Centre for Advanced Technology in Indore, India. He received a BSc (physics) from the University of Kashmir, India, and an AMIE from the University of Calcutta. Email address: ashwin@cat.ernet.in
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June 8, 2006[Ideas For Design] Boost Stepper-Motor Switching-Logic-Sequence Performance
Sometimes less is more. Here, a quarter-step switching logic sequence for stepper motors offers several significant advantages over full-and halfstep modes—higher resolution, smoother drive, minimal resonance effects, and reduced settling time. The method uses a 16-step input sequence to produce 1600 steps per revolution in 400-step motors. At the heart of this quarter-step technique is a so-called half-excitation state, during which the ratio of motor current ...
