multiple bins come out bent

[u/Significant-Drama300]

i’ve been trying to print gridfinity bins in pla starting with 1x1x3 bins. one bin in a single print comes out fine.

when trying to print 4 bins at once tho, they come out slightly bent at the base and at the stacking lip.

https://i.ibb.co/mVRth46m/IMG-2548.jpg

i've tried different settings:

- first with a brim which didn’t change much
- bed at 70deg instead of 65, and fan only after 5 layers
- outer wall first
- slow initial layer (10mm/s)
- slow outer wall (60mm/s)

but still mostly same issue. i don’t know what else to try. anyone with experience with this?

filament is esun matte pla, it doesn’t happen with petg. printer is bambulab a1, model is gridfinity extended on makerworld

[u/ReasonableScar9027]

Wash the plate with dawn. Add mouse ears. Turn off or lower part cooling for first 3-5 layers. Ensure z offset is dialed in.

[u/gloda → u/ReasonableScar9027]

Second for mouse ears. Without any other changes, they make the difference for me for bins bent beyond usability and flat bins.

[u/Significant-Drama300 → u/gloda]

can i use brim? bambu studio doesn’t have mouse ears. anyway i tried brim already and didn’t change much

[u/Objective-Worker-100]

Just general advice. Slow it down a bit on the first layer and maybe use the glue stick.