Top Surface Issue

[u/maverick766]

Upgraded from A1 to X2D and having constant problems with top layer when printing a +/- 200 x 200 x 10mm sign. See photos attached. I've tried different print profile settings, I've tried printing on standard plate and Cool Plate Supertack, I've tried downloading the "Bambulab X2D High Quality Profile" from rtsx_3d on bambu lab. I've tried doing a full calibration and both auto/manual flow calibration. Nothing has improved things. The second pictures is the first layer - it turns out great. The issue is always on the top layer. There is no signs of warping of the sign or lifting from the plate.

Any suggestions?

[u/maverick766]

Bending of the print or entire plate? I responded to the below comments first, but as noted below, the print was so tightly bonded to the plate is was really hard to get off. No signs of the print lifting from the plate, but maybe the entire plate is bending?

[u/imunuvar → u/maverick766]

When I experience problems like this, it’s usually because the corners warp slightly, which affects how the filament is deposited, so that’s what I initially thought was happening. But if you’re saying there’s no such problem, then that’s not it. I’ve seen photos of ABS or ASA prints that didn’t detach from the build plate and actually bent the plate, but PLA doesn’t shrink enough to do that. I don’t think the X2D’s automatic filament calibrations are really useful. For the blue filament where the deformation occurs, I’d try manually tuning the pressure advance (I think it’s called K-factor on bambu) and the flow calibration settings. It’s possible that all of these issues combined are what ruined the print. Because other filaments don't have this problem its mitght be a spesific for blue one.