Hello, my name is Peter R and for the past several months I have been building a 3D printer. I have the frame and everything done, but I consistently run into the issue where my stepper motors run erratically; when I issue a movement command they change direction at random, move in unpredictable spurts, clank, grind and make weird noises--and that's if I'm lucky enough to get them running at all. They appear to be uni-polar motors, and I have wired their four wires in as many orientations as possible and still get the same issue? Is this a board problem, or the motors themselves?
The motors are 17H249-02S motors, manufactured by Xuquan motor, but there is little documentation on them on the internet as far I have found.
Many thank to whoever can answer this.
