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Print settings help with PET-CF (forum.guncadindex.com)

Sup yall,

I’m looking for some help on getting some print settings for PET-CF. I picked myself up a roll of the Polymaker Fiberon PET-CF17 and I’m looking to make an SL-308 lower out of it eventually. Currently on a Bambu P1S.

I did some research on here through some old posts and through some other sites but I’ve been seeing some conflicting info. Some people printing super slow around 15mms-40mms and others printing at 60 or higher. Bed temps varying between 70 and 100. Nozzle temps between 270 and 300. Cooling fans on and running the entire time or fans turned off like printing PA6-CF.

Anyone got any info?

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[-] Stuck7hrottle@forum.guncadindex.com 2 points 1 month ago* (last edited 1 month ago)

Search the Ark https://fosscad.io/c/ark if you haven't yet. With PET-CF, you will get a lot of different opinions. PET-CF prints great under a wider arrange of settings, and you won't really know if the layers adhered until they snap.

When you find the settings you want to try, print something small and see how hard it is to snap along the layer lines. Then adjust. When in doubt, hot and slow with minimal cooling.

Protip: link subs like !ark@fosscad.io and users will be able to access them without leaving their instance

this post was submitted on 30 Oct 2025
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