Hi,   my D1 Pro has bee working perfectly well for months. But now the laser module will not return Home properly. The module traverses left to right, on the X axis perfectly well. But the gantry does not move properly back and forward in the Y axis. It juddrs and the belts grind and the gantry vibrates, until the motors cut out.

It feel like it's a mechanical issue, but if anyone can point at where I should look for slipped belts or whatever, I'd be grateful

thanks