What *is* this going on here?

Bambu Lab P1 Series Troubleshooting
1

OK, so I’ve printed this part multiple times (many more than I would’ve liked), and it seems like there’s often a defect like these. The part is done in PLA with the Bambu Support PLA/PETG filament for interface. Sometimes the defect is on the bottom, sometimes it’s on top. (so, I’m guessing it’s not necessarily an adhesion problem, plus I’m an adherent (LOL) glue stick user.) Here’s the latest sample - this defect was on the bottom of the piece, using all defaults:

defect on bottom
defect on bottom2416×2115 202 KB

This was an earlier one on the top of the piece (and might’ve been caused by me reducing the infill density in hopes of speeding up the print, but it’s not alone):

defect on top
defect on top1654×1229 38.7 KB

The defect on the bottom of the part is clearly much more severe, and makes the part totally unusable.

My AMS says I’m at one out of five moisture and my hygrometer bottoms out at 20%, which is what it says. There’s enough fresh Dry & Dry in there for me to believe that all is well moisture-wise.

What might I be doing wrong?

Thanks!

2

These are two different issues.

The first image shows the result of warping; the corner warping upwards during print. This is solved by using a brim; in this case you can use brim ears. But for some weird reason, Bambu Studio doesn’t have “mouse ears” as a brim choise. So you must either use discs or another slicer, such as Orca.

The last image shows some tearing which is hard to determine the cause of, without assisting images from other angles - at least for me. It could an issue with the model, or too few top layers.

1 Like
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Thanks for the tip!

FWIW, I found this great step-by-step guide for doing this.