Underextrusion but only on the front of the build plate

Bambu Lab P1 Series Troubleshooting
1

Hi everyone.
This issue is consistent on my P1S. I’m not sure if its underextrusion or a poor Z offset but I can’t explain it. The first picture is towards the front of the PEI sheet close to the door and the second is in the middle. There are visible gaps between the brim lines and between the wall loops. However this is not apparent in the middle or the back of the plate as shown on the second pic.

IMG_20231005_025757a
IMG_20231005_025757a1024×1366 263 KB

IMG_20231005_025910
IMG_20231005_0259101920×2560 773 KB

I ran a simple test by printing two 0.2mm strips using Bambu Basic PLA in the 0.20mm Standard Profile after I ran the full calibration and bed leveling, but it persists. The top strip is printed at Y=240mm and the bottom at Y=10mm

IMG_20231005_034031
IMG_20231005_0340311920×1100 142 KB

I suspect it is a z offset issue as I’ve noticed that PLA prints that warp tend to be closer to the front.

Has anyone else encountered this or know a fix?
Thank youu :innocent:

2

Try this: Manual Bed Leveling / Manual Bed Tramming | Bambu Lab Wiki

I had similar problems some months ago with my P1P. After doing tramming the bed, my first layer is nearly perfect again. :slight_smile:

3

Thank you @print.in.3d I had no clue.
I will try it and report back

4

That indeed fixed it. Much appreciated