I have recently tried to hook up my motors to my RAMPS 1.4 board, but was confronted with the problem of the motors vibrating instead of turning. At the time, I was using Sprinter. I have recently switched over to Marlin and I am still having the same issue. The motor drivers that I am using are the Pololu md90h series. I read onlone that my problem might be that my drivers can't handle the uStep value that I am passing in, but as far as I am aware, Pololu use a 1/16th uStep value. I am completely lost, any help would be appreciated.
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