My UM2 is playing up, the y axis is stepping off, originally I was thinking it was the stepper motor as I had one previously that began to seize and would mis step, but got some new replacements as my reconditioned one with new bearings was doing the same, but problem still there.
I then thought it way be the belts were getting slack, as a quick fix I fitted a little belt tensioner, but still the occasional problem.
Not only that but occasionally the Y axis motor will stop, head won’t home or move, switch off and back on and sometime it works but will after a period of time stop working, checked with spare motors just plug in and intermittent function.
So,
Is my main controller board dying on me and needs replacement, and if so any recommendations as to where from?