A few days ago, after a print only the right hand side stepper motor started to lift and the left hand side stepper didn’t move. Obviously this caused the X carriage to be skewed.
However, once I readjusted this it printed again satisfactorily.
The following day however it has now started calibrating too high.
It appears to either only just touch the pads in each order to calibrate the printer, or not touch them at all. But once the print starts, it is at least a millimetre off the print bed. I can place a business card on the printer bed and it runs over the top of it without touching it at all.
Can anyone provide any advice as to what might be wrong?
I can cleaned it several times, to no avail.