Nozzle hitting the bed while calibration
Hello!
I've had my prusa for some 2 months now and done a couple dozen prints. On my last print however something went terribly wrong - looks like the X-axis belt slipped on the pulley or something (see the picture 😐 ).
I checked all the belts, whether the pulleys are tightened securely etc... and ran the xyz calibration.
Situation now is:
-At first the probe could find 2 first calibration points every time, now it sometimes fails to find the 1st one (the led is blinking however so I know the probe works)
-It passes selftest everytime, however the nozze hits the bed before the Z-endstop turns on
-During calibrate Z nozzle presses againts the bed so hard that the X axis tilts (hits bed hardest in the upper right corner, touches bed on the left bottom corner and all top 3 points)
Probe is secured with green licktite so I am pretty sure it didn't move up. It was perfect for many prints so I assumed I won't need to adjust it anymore 🙁 Do you have any idea what might be the reason for my problem? Is it possible that the bed warped (it seems juist as flat as ever to me) or the calibration points lost their properties (its magnets right?)
Re: Nozzle hitting the bed while calibration
Here's a pic of a print I just started - printer somehow was able to start printing. It looks like the higher you go on the Y axis the closer the extruder gets to the bed to a point where it can't extrude fillament any more.
Is it possible that the bed bent as a big ABS print was cooling down and shrinking??
Re: Nozzle hitting the bed while calibration
I had the same issue, turned out to be that the XY frame had twisted. I diagnosed the issue by putting it on a flat surface with some equal height wood blocks under each foot (my son's train track sections were just right). It didn't sit equally on all 4 feet, so I wiggled it around until it did. After that I retightened everything and re-ran the XYZ calibration. Annoying, but at least it fixed it.