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I'm Unable to get any PETG HF Filament to Stick on the Bed after having Switched from a 0.4mm to a 0.2mm Nozzle [Bambu P1S] (self.3dprinting)
submitted 3 weeks ago* (last edited 3 weeks ago) by Mr_Mofu to c/3dprinting@lemmy.world
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So I got the 0.2mm Nozzle for my P1S to do some Detail Heavy stuff, while with PLA everything works perfectly Fine, Once I try to use any Roll of PETG HF it just refuses to Stick to the Plate!

I've been Mostly Testing on my Coolplate Supertack, but same issue happens on the Textured PEI. Both of them have no issues when trying PLA the Print before.

I've now tried a Range from 230c° to 250c° for the Nozzle and 60c° to 85c° for the Headbed with only limited result, as Only the Combination of 250c° and 85c° for the Heatbed got me the Brim around the Print to stick, but not the print itself.

What am I overlooking here? Is there some settings I need to adjust when switching Nozzles? Dp I need to go even Higher with the Temps? Maybe its the Flow Ratio? I've tried both the reset one and the one that was set with the 0.4 Nozzle with no real change. Cant run a new calibration for it since nothing sticks. Both spools of Filament have been dried for 48 Hours, with a few hours of resting before use ofcourse.

To note, PETG HF works perfectly fine on the 0.4 Nozzle and both Plates have been cleaned multiple times now... as seen to work with PLA. What settings work for you folks? Anyone with simular issues?

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[-] ExtremeDullard@piefed.social 5 points 3 weeks ago

Use glue.

[-] Mr_Mofu 1 points 3 weeks ago

While that will definetly help for my Current project, I do wanna get to the bottom of why it stopped working and fix it once and for all!

[-] ExtremeDullard@piefed.social 4 points 3 weeks ago* (last edited 3 weeks ago)

PETG never sticks well on any bed plate on our Prusa Mk4 for some reason, while it seems to stick very well on the plates coated with the same materials on our Prusa XL.

I tried to change a million parameters, and then I gave up trying to understand, because at some point all I want is to stop wasting filament and time, and get the parts I need.

So I use glue and I spent 2 minutes wiping off the glue in the sink when it's done. It's just pragmatic and it lets me get on with the rest of my life.

[-] Mr_Mofu 2 points 3 weeks ago

Hm I see, if anything im glad to not be the only one with such Oddball issues! I'll keep my expectations at bay incase this does end up hopeless

this post was submitted on 11 Sep 2025
16 points (100.0% liked)

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