Stepper motor vibration and noise

Hello Karl. I did that as well. In fact vibration did resuce after increasing micro steps but rotation than becomes very slow. Way to slow for throttles. I tried different motor brand and i get same.

I would be looking at your motor wiring. Different motor manufacturers seem to use different color wires, one type would be Red and Blue for one coil and Black and Green for the other and another type would Red and Yellow for one and Blue and Orange for the other. On my motors I have the Red and Black as the + wires.

Hello Friend. Thank you for taking interest in this issue. I have texhical sheet from manufacturer. Black A+ green A-, red B+ and blue B- . Interesting thing is that motors are functioning since lever are moving correct. It is just that while they moves there is such vibrating noise. Could it be that pulse frequency is low?