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A5S Community Firmware rams nozzle into printbed
I just tried out the community firmware on my brand new (not so much anymore) A5S. When I tried printing (after leveling the bed), it started the print by heating up bed and nozzle, but right after that rammed the nozzle into the bed (going way past the z-endstop), pusching the bed down by 3mm or so and then proceeded to print, scratching the bed as the motors moved along until I could block the process by turning off the printer...
I would still like to use the community firmware, but is there a way to fix this issue?! The thing is, that I don't want to experiment too much, as the stepper motors not only run the nozzle into the bed, but also ram the z-stop switch pretty hard, so I guess if this keeps happening the switch will break off
My starting g-code (which worked fine with the factory firmware) is:
G28 ; home all axes G1 Z5 F5000 ; lift nozzle
I thought it might be missing the leveling data, so I also tried to do a
M420 S1 after the G28... Same result...