As long as the switch can be actuated (if the UM2 uses similar ones than the UMO, you should hear a loud "click" when they actuate), it's not important if the metal tab is perfectly flat or not. But by deforming it, you will change the limit position.
Maybe the switch's limit is now "behind" the mechanical limit, making it impossible for the machine to reach it?
Greetings from Zurich
thank you very much for your fast and detailed reply :smile:!!!
yes i manually moved the printhead, restarted, and then the printhead is moving diagonally (!)
to the left corner,stopps and stucks while trying to move to the left...
i got a multimeter today and with your instruction i am going to try testing continuety tomorrow.
with the bending iam not quite sure...i already bend it away from the switch but didn't try to flatten the bend inside...
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