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Originally Posted by KenWittlief
generally in engineering you look for a single point of failure. If three motors have stopped working then most likely one thing has failed that can stop all three motors
I would look at stuff like your ground connections (ground stud or the terminal block)
or make sure your SW guys didnt decide to test new SW when you were not there.
It very rare for two things to fail at the same time. Extreemly rare for three things to fail all at once.
Look for the single link that ties them all together.
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A good example of this is when our programer decided to load so code to try out. I was called in saying that we lost the right drive train. After a few minutes of searching, I asked the programer to double check the code. Sure enough there it was. It is unsual for two of the same things to break at the same time.