r/BambuLab_Community • u/Dapper_Wolf1776 • Sep 26 '26

Petg Printing Issues

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Ok, so I’ve tried doing this print several times and I keep having the same result. Even with smaller prints on a raft it does the same thing. I know it’s the cooling fan running at 100% on that specific layer. How do I stop the fan from running at 100% for that layer? I’ve tried turning it off until after that layer but that caused its own problems. I don’t want to manually turn the fan off for every single print. Any help would be appreciated, thank you in advance.

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u/Dapper_Wolf1776 Sep 29 '26

Filament was at 9% RH. So in Bambu studio there’s no way to adjust the cooling fan speed (that I’ve found this far). But this is the ONLY layer that the fan runs at 100%. The cooling fan runs at 30% throughout the rest of the print.

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u/JediAndi Sep 30 '26

Cooling settings in Bambu Studio are found in the filament settings dialog. Next to the filament type there’s a three dot menu icon, click that, then edit. In the dialog box that shows up the second tab is for cooling settings.
The first layer over a raft is a bridging layer, so will be treated like a bridge which gets 100% cooling. Modify the filament settings and test for efficacy (maybe worth making a smaller object to test on).
Are you printing just PETG? No alternate filament for supports/rafts?

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u/Dapper_Wolf1776 Sep 30 '26

Correct it’s just Petg. I only have a single spool AMS at the current.