Hi folks,
I had a noise issue when the Z axis was moving up and down, which I reported. I subsequently noticed that the Z axis track is in fact crooked, with the right side quite a bit lower. See attached pic.
The pegboard holes are a good reference. Printer is a couple of months old. No impacts, etc.
I have updated my open ticket with this information, but thought I would post here as well given how long it is taking Bambu to get back to me.
Thoughts?
If you feel like diving in… The below video (2:05 mark) shows the motor and belt drive. If support doesn’t offer a fix and you feel like exploring, it’s a pretty easy fix. You just need to loosen the belt, and manually adjust the one side to get it level. Not sure, but the wiki may even have something on this? Or maybe others have an alternate way. Out of curiosity, did it do something to possibly make it skip a tooth on one side? My Lulzbot Mini 2 does this automatically, but has 2 motors and uses what I call a “ramming” technique… It’s unnerving to hear every time it does it…
Thank you so much! Looks like it may just need the pulleys realigned, but I will wait to hear back before I tear into it. Don’t really want to jeapordize the warranty…too bad it’s taking so long for Bambu to respond…guess the recall is slamming these guys 
Did you ever fix this? Solution?
Hi…turns out the Z-axis threaded rod bearings had come away from the bottom mount. Long e-mail exchange with support, but in the end I returned it under the recall and got a P1S combo.
I have exactly the same problem and, to be honest, I don’t feel like dismantling a virtually new printer and tinkering with it myself. How did Bambulab come to take your printer back? Mine is exactly one day past the return deadline, which is why I have to rely on support.
Many thanks and best regards
Interesting…I did not realize there was an end date for the return option. As indicated earlier, I had a procracted e-mail exchange with the support folks, including videos and photos. They suggested the return since that option was available at the time, so I decided to do that and get a P1s. (Which has the same system used to hold the Z rod bearings BTW, but so far so good.)
