P1S bed level/trammed correctly?

Bambu Lab P Series General Discussions
1

I recently noticed an odd behavior with the bed when making top and bottom layers. When printing from left rear to right front, the bed screws move ~10-20 degrees of rotation. On the opposite layer (left front to right rear) it is stable, or at least movement is not perceptible.

I don’t know if it’s been this way the last 2 months or if it’s something new. I think that this means that I need to tram and calibrate, but at this point it’s just unnecessary movement and isn’t causing any problems. I was looking for a few veteran opinions.

2

This is likely mesh leveling at work. As a crude example, if the left side is 0.1mm taller than the right side, then the first few layers [maybe more? firmware does this, so only bambu would know for sure] are adjusted to move up and down to match.

3

Thanks, I was thinking that this was a flat section of the print, at least it should have been. I noticed it first on a reflection from that camera.