My company bought an UM3 before Christmas, and I have been asked to look after it.
Since purchase, I have had an issue using the auto bed levelling. It appears to be using the raise print head lever the wrong way around. Manual calibration works perfectly.
When levelling either head, it pushes the head into the bed with such force that it compresses the bed springs fully. it appears it is trying to calibrate the 1st head, using the sensor on the 2nd. Simil
Thank you, SanderG, for your kind recommendation, I respect your opinion.
Anyway I just repaired it, my UM3 ist printing again. Wasn't so difficult, please see my photos and the description.
Both of the wires connecting the capacitive leveling sensor are plugged into contact springs on the sensor, and the other side is plugged into a print head PCB connector. Obviously there is a design problem which leads over time to breaking wires at the sensor side, due to bending the