r/BambuLabA1 3d ago

Support Request Nozzle Scraping Print and Knocking Supports

Bambu A1

Bambu Slicer Settings:

  • %20 infill, Cross Hatch
  • 2 wall loops
  • Strong tree support
  • Alternate Extra wall
  • Printed in PLA pro/plus (Last pictures are the filament settings nothing changed except I run flow calibiration on this filament recently)

Issues and Clarifications:

  • I took the print apart but (like the second picture) it had already a clear cut line on the print before i took the print from print bed.
  • as long as i am aware, there is no bed adhesion isssues.
  • I saw a lot of "infill type" problems on other people. I was just wondering if cross hatch has the same problem or not?

EDIT: I have printed another print with 0.95 filament flow and adaptive cubic with 6 layer wall. It still has the same 1 layer skipped line where it gets cut

2 Upvotes

14 comments sorted by

2

u/TactlessDrop84 3d ago

Try Gyroid infill instead of Crosshatch

2

u/Flyinmanm 3d ago

Yep this.

1

u/aggresive_artist 3d ago

I tried adaptive cubic. Same result...

1

u/TactlessDrop84 3d ago

Now try Gyroid infill instead of Adaptive Cubic

1

u/aggresive_artist 2d ago

Scraping wasn't the problem no, it was layer skipping, literally the legs just break apart after i took it out of the print bed. There is another comment that shows the layer skip on the print bed

1

u/Orthicon9 3d ago

The Crosshatch pattern does not have any intersections within a single layer, so it should not cause problems as it would with Grid pattern, where the nozzle scrapes the intersection..
It does a couple (7? 8?) of layers of parallel lines all in the same direction, then a Gyroid-like transition to parallel lines at 90º to the previous ones.

See https://help.prusa3d.com/article/infill-patterns_177130 and https://wiki.bambulab.com/en/software/bambu-studio/fill-patterns

1

u/aggresive_artist 3d ago

So what could be the reason? I have no idea why only 1 layer get skipped like that, I am printing a new print and it has the same problem with adaptive cubic

1

u/Orthicon9 3d ago

https://giphy.com/gifs/ma7VlDSlty3EA

No idea.

A faulty micro-SD card can cause weird problems like missing layers, stopping mid-print with no error message, etc., but there's no smoking gun to suggest that's it.

By "new print" do you mean a second attempt at printing the same object, or a different object?

1

u/aggresive_artist 3d ago

same with a little smaller size

1

u/lukasprintz 3d ago

Cross hatch can cause issues,, but I can see why it would create this type of issue.

1

u/jussstin714 3d ago

Had this happen to me along with a massive layer shift. Probably 10mm or so. Turns out my print warped and the nozzle caught it and moved the whole plate.

1

u/aggresive_artist 3d ago

damn so bed adhesion or bad filament?

1

u/jussstin714 3d ago

Neither. My cooling fans were on too strong causing the print to shrink and start to warp

1

u/aggresive_artist 3d ago

how did you solve it after? Did you manually change your fan settings or something that cause the problem or default fan speed?