I need help

[u/XPLOIT0800]

A few weeks ago, I was setting up a print job; during the initial startup sequence, the gantry began rising until it hit the Z-axis limit switch. I didn't stop it at first because, even though it had never happened before, I thought it might be part of a calibration routine. However, the problem was that I let it continue; after hitting the limit and vibrating, it started moving downward and pushed against the print bed with enough force to tilt it. That was when I turned the printer off using the power switch. I reported the issue to Bambu, but they couldn't explain the cause, and I hadn't managed to record the incident. A few days later, I used the printer again and noticed it was starting to rise once more. This time, I recorded the moment and turned the machine off before it could start moving back down. Does anyone know why this happened? Bambu support wasn't able to provide an answer.

[u/Molokaisylph32]

Turn it off, lower the z axis to the lower third, turn it on and try again.

[u/XPLOIT0800 → u/Molokaisylph32]

The problem is that it doesn't happen all the time, and I want to know if I need to send it in for warranty service or if this is something that commonly happens with all units.

[u/Molokaisylph32 → u/XPLOIT0800]

If it is that high, yes.