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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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[-] morbidcactus@lemmy.ca 2 points 3 weeks ago

Are you able to mess with the first layer offset on the bambu printers? May need to bring your nozzle a bit closer, especially with a textured surface. Temps seem comparable to the stuff I have on hand.

For cleaning, is soap and water compatible with your surface? Personally found that while IPA is fine for maintenance, a few drops of unscented dish soap in water works extremely well as a degreaser, I've literally washed stubborn surfaces in the sink. Petg is super picky with any residual oils and the small nozzle could totally make that worse.

Maybe try running slower? Just to eliminate variables, may be worth running a quick extrusion calibration? Petg can be an absolute pain for bed adhesion in my experience.

[-] nullroot@lemmy.world 2 points 3 weeks ago

I'll second the cleaning with dish soap. I've had lots of success with 0.2 nozzle and petg on my a1 mini on the standard textured pei and the biqu (glacier I think) smoother ice themed plate. Possible also you got a defective nozzle

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

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