wonder if anyone can shed some light on this or point me in the right direction,
recently built and one motor on one axis is skipping backwards at the same point on the rail.
Its a mini rambo board and the motors are wired together (edit: in series) . I noticed the x axis was running smooth as but one motor on the y would stutter a little at the same points down the rail. I first of all took it apart and made sure everything was square and then replaced the motors with new ones and we had the same problem. Ive switched the x and y on the mini rambo and the problem persists on the same motor (now it would be on the x axis though). I then upped the current to the motors but that only seamed to exaggerate the problem (though its now clearer to see whats going on)
Heres a link to a vid of whats going on
(I know it looks a bit of a mess, it was all tidy until i started pulling it apart to try and fix it)