Gaps in model walls

Hello, i get these gaps in my walls randomly when i print using Bambu Lab PLA standard settings 0.16mm layer lines 0.4 nozzle. I’ve tried adjusting wall thickness, print speeds, wall generator , etc, etc without any result. If i print several models at once the gaps appear at the same spots on all models.

Anybody got any clues how the get rid of these gaps?

In your preview, cross-section to that layer height and then show what line types are in that area. That will at least begin to tell the tale as to what is happening.

Under normal circumstances my first reaction for Bambu PLA is never suggest drying but in your case, the evidence is clear. You either have wet filament and/or haven’t tuned the filament. I say that because with Bambu PLA I cannot conceive of an occasion where I experienced stringing.

On the second note, after you’ve tuned and dried your filament, try changing the wall order to outer inner. It can be found here:

Wall order outer/inner will force the filament to be laid down from the outside in.

And last but not least, try rotating the model so that cooling is coming from a different direction if the first two suggestions don’t work.

Good Luck :four_leaf_clover: and let us know if you success.

Will get back to you after i tested this. Thanks :smiley:

I tried drying the filament, rotating the model, changeing wall printing order. But the results are sadly exactly the same.

Well at this point, you’ll have to go back to basics. These are the steps I might suggest.

  1. Using a cube primitive, try creating linear model with similar height and length. The goal here is to recreate the problem on a reproducible scale. Alternatively, you can use the cutting tool and cut the offending section of the model into a smaller piece so that you can print more quickly during trial and error and waste less filament. If you can’t reproduce the problem, then it’s going to be a lot harder to find a solution.

  2. If you’re not using Orca’s baked-in calibration, that might be a worthwhile test.

Or you can simply trial and error test by reducing the max flow rate and guess.

May I assume that you already tried to use quiet mode to slow the print down to 50% speed? All of these tests will focus on filament feed rates.

I will try this out and get back to you. Thanks :smiley:

Unrelated, but I’m just wondering what the reason is for the printed frame around it? Looks like what you’d get with old school injection molding flow path (forgot what they’re called), but why re-introduce that into 3D printed parts, unless maybe its an homage or something like that? Or maybe there’s some other, more practical reason.

Anyway, regarding the rest of the print, apart from the region that bothers you, looks like nice work!

I recognized the model from Thingiverse. It’s an all-in-one print, hence the reason for the “sprues” or “runners” is just a style choice by model makers who desire to make a one piece print.

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Hello and sorry for late respons. (I have not printed the model in a while). I peformed all the OrcaSlicers calibrations and the results are much better. (I dont have a picture sorry). Thank you for all the help!

I’m having the same issue with planes that I’m printing with a single wall. Whether I’m using pla,pla fly (overture pre-foamed) and will be testing color Fab high temperature foam pla I get a netting type finish where it starts at the seam and when you watch what’s going on it seems like the feed rate and that small outer wall section is faster than the rest. I’ve tried slowing down the print changing the extrusion rate a little bit and was looking feverishly for a pause after changing the retract rates to get filament in the nozzle when it goes through those areas. Like you it doesn’t matter how you Orient the peace how slow you run it it persist. If it weren’t for a blown motor in a 2000 S10 I would have a prusa XL and see if these problems will go away. I truly believe it’s a software issue with the Bambu printers. If you have any feedback on results you’ve been hunting for I would love to hear about that. I hope you did resolve your issue.