I kept calibrating and calibrating and couldn't understand why the print was always going wrong and the cross bar kept on going out of level. Finally I have figured out that the two Z-axis stepper motors are moving sporadically. Sometimes they are in sync and sometimes they have independent motion. The online forums say that its as a result of the firmware but I tried updating but this doesn't help.
The motor mounts don't seem to be slipping and the right hand motor almost looks as if it reverses a little after going forward (three steps forward and one back). However, as I said above this is sporadic.
The motor mounts don't seem to be slipping and the right hand motor almost looks as if it reverses a little after going forward (three steps forward and one back). However, as I said above this is sporadic.
