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1 vote

Stepper motor waveforms

At high step rates, step motors exhibit a dynamic instability. In many cases, it results in a lightly-damped velocity transient. That is what you are seeing. In worst case, the drive will go unstab …
whitegreg56's user avatar
1 vote

What is pros&cons of using a unipolar stepper as bipolar?

Being as the number of turns on each pole is doubled by going to bipolar, the required current for a given torque is halved. Thus, the torque constant is doubled and so is the Back-EMF constant. The …
whitegreg56's user avatar
1 vote

Rotate stepper motor in low RPM and minimum vibration

It looks like you have a very low step rate....~10 steps/second on a 200 step/revolution motor. A typical hybrid step motor is a fourth-order non-linear system. With an operating point near zero ang …
whitegreg56's user avatar
1 vote

Why is the load supply (VBB1) on my A3967 shorting to both OUT1A and OUT1B when the stepper ...

It sounds like you are disconnecting the step motor while the driver has it powered. Under no circumstances should you do that. The step motor windings are inductive and there will be a huge spike i …
whitegreg56's user avatar