Large gap in the inner corners

Bambu Lab P1 Series Troubleshooting
1

I’m getting a large gap between pieces of my print that should be solid; photos and details here Bambu printer corner gap - Album on Imgur

It’s a 0.8 mm nozzle. Slicer file here https://www.dropbox.com/scl/fi/hkjtpwaqu9eokgh7qkaow/Spool-Cabinet-2.0-PRINT_-Gap-troubleshoot.3mf?rlkey=tkqwejnoi6bxez6sk1xz4revx&dl=0

Reducing seam gap to 0 just made it bumpy, didn’t help at all. Any ideas?
This print is supposed to be close to airtight, so this is a big problem. I need it to work for others on Makerworld, so I can’t mess with the material profile (it doesn’t upload).

2

Welcome to the community.

Your file is behind a password protected wall. You’ll get more responses if you make the file public.

However, first look at the image and I can see already three issues.

  1. Filament is wet.
  2. Filament is not properly calibrated.
  3. The walls of the model itself are too small and therefore the slicer is omitting them in the print.
3

The download button is in the bottom middle; the top login thing isn’t required, dropbox is just pushy.

I figured out some of it… It’s from the single line walls that Arachne produces. Classic walls with “Detect thin wall” (which allows single line walls) causes the same awful holes, except worse.

Unless there’s some hidden slicer setting to tell the ****ing thing to overlap the walls instead of leaving giant gaps, I think I’ll have to go down to a 0.4 mm nozzle, double up the walls, and turn this into a 16 hour print. 224 hours of printing for the whole cabinet >_<

4

I seriously doubt you will achieve an air-tight or moisture-tight joint with a single layer regardless of which nozzle diameter you select.

IF you must try, dry your filament, calibrate your flow and pressure advance first. Those are all working against getting a tight joint in the 3-way corner.

5

That seems to be a device setting, so it won’t upload to Makerworld. No can do.

The single wall was pretty airtight. Could blow against it and get a solid seal. Relatively moisture tight compared to most plastics too, according to the comparative numbers chatGPT found. It was just those big holes in the corners. But bambu slicer has no way to tell it to fix those 2 mm gaps, so it’s hopeless regardless.

6

Pressure advance is a part of the filament profile and calibration, it needs to be set for YOUR filament, using YOUR printer, just like nozzle temperature and flow rate. It is not normally dependent on the model. Pressure advance affects every corner and direction change. You need to show Makerworld a successful print - you will not have one if your printer is using incorrect settings.

Consider changing the model only where necessary, in your design program, instead of using a smaller nozzle, which would slow down the entire print. A simple filet at that corner might be enough to strengthen the corner, or perhaps you can widen only the walls.

AFTER you verify that pressure advance and flow are properly set, using DRY filament…