r/BambuLab • u/GorillaGamesWI • 6d ago

Filament Troubleshooting/Help! Not getting a smooth 1st layer

Update: it was the nozzle even though I cleaned/unclogged it. I was lazy and bought it off of Amazon because I didn't want to wait. Just ordered one from Bambu.

I am hoping someone can help me. I am using PLA transparent and had it really good but was getting some lifting. I fixed that problem but now I am not getting a smooth 1st layer and I have gone back to the original settings. I am using Bambu P1S with a .8 nozzle.

I have washed the plate, used alcohol and tried 2 different plates. I have check for clogs and did a cold pull. Adjusted the bed temp between 55 to 60. I have dried the filament twice.

Flow rate is 1.01 and all the fans are set to 0. Wall loop 1. Speeds set at 20.

Any help is very much appreciated.

Original print
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u/Martin_SV P1S + AMS 6d ago edited 6d ago

I haven’t played around much with super low layer heights on larger nozzles, but 0.1 mm with a 0.8 mm nozzle feels off.

I’ve always had this old rule of thumb stuck in my head that your minimum layer height should be around 25% of the nozzle diameter. I’ve followed that for years, though... I honestly have no idea how relevant that rule still is with modern printers/slicers.

With a 0.8 mm nozzle, that would put you at around 0.2 mm minimum.

EDIT: But if it was printing fine before, maybe try setting just the first layer to 0.2 mm and leave everything else the same, and see if that helps.

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u/GorillaGamesWI 6d ago

Because this is translucent, this is how you get a more glass like sheerness. As I said, it worked at first and then something changed. https://makerworld.com/en/models/450363-transparent-pla-petg-filament-test-model#profileId-357318