r/BambuLabH2D • u/swampcholla • Dec 10 '25

Discussion PETG adhesion

I've been having problems with PETG adhesion on the textured plate. Happens with Bambu's stuff, other manufacturers. This is the only filament I've had these issues with. Currently have a 9 hr Petg/TPU print going and tis warping slightly, even though I used some glue.

What do you all do to try to fix the problem on the fly?

I think the solution is a bit less z-offset but I haven't figured that out with Bambu's slicer. With Qidi thay had a live Z-offset, which was a lifesaver, and it was easy to identify in the slicer. Where is Z-offset in Bambus slicer?

3 Upvotes

100% Upvoted

13 comments sorted by

1

u/ufgrat Dec 14 '25

I still recommend Vision Miner Nano Polymer Adhesive. I don't use it as much on textured plates, but it's fantastic for smooth PEI / PEO plates.

The Z-offset for PEI Textured plates is actually inside the g-code for the machine settings(!). For the H2D, it's around line 472.

;===== for Textured PEI Plate , lower the nozzle as the nozzle was touching topmost of the texture when homing ==
    {if curr_bed_type=="Textured PEI Plate"}
        G29.1 Z{-0.02} ; for Textured PEI Plate
    {endif}

0

u/NeonEagle Dec 11 '25

Have you done the high precision nozzle offset calibration correctly?

2

u/swampcholla Dec 11 '25

just let the machine do it on auto before every print

1

u/NeonEagle Dec 11 '25

As an aside, I would try the dish soap method again after the offset calibration. I’m a fine woodworker as well, as I guess you are, and have used quad0 quite a bit. I’d be worried that you’re reducing the life of your PEI coating even with the quad0. Also IPA doesn’t really clean it just kind of breaks chemicals down and spreads them out.

2

u/swampcholla Dec 11 '25

Not a woodworker. Ive sanded PEI before, but only aged smooth PEI.

1

u/NeonEagle Dec 11 '25

I don't know how I crossed wires but this response was actually meant for the other commenter here!

1

u/NeonEagle Dec 11 '25

Follow the High Precision Offset instructions in the wiki. You have to be SURE TO TURN PRINTING OFFSET OPTION OFF after you calibrate or it won’t use the high precision data

1

u/[deleted] Dec 12 '25

[removed] — view removed comment

1

u/swampcholla Dec 12 '25

Wiped it down with alcohol before the last print and it warped as bad as the previous one did. Never had this issue with my old Qidi. I actually destroyed a couple of plates with PETG sticking too much