I am having this problem today.
Hi @servant74,
this seems to be the Z-end stop switch.
The first thing the printer will do is to synchronize the the bed position, this is done by lowering the bed until bed end stop is sensed, then the stepper motor stop and reverse to the actual start position.
In your case, the motor step down, but only reach the hard stop and jump back a step, this will go over and over and makes a lot of noise!
The end switch is probably pressed to far down (out of adjustment), so that the bed "stop screw" do not reach the actuator lip. Of course, a faulty switch or unconnected connector for this end switch is also a possible error.
Good luck
Torgeir
Edited by Torgeirtext error.
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1
great, I'll check that.
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UALib3D 2
Did You ever figure out what the issue was? It is happening to me as well.
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