Sometimes less is more. Here, a quarter-step switching logic sequence for stepper motors offers several significant advantages over full- and half-step 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 flow is held very close to half.
展开▼
