I am trying to print a PETG spool. I have tried 3 times, on textured plate just cleaned + glue stick and it didn’t work. I have a brim, but it fails while making the brim or after in the first few layers.
Room temp is 26C
Quality spool V3.3mf (3.4 MB)
I have tried slowing down the first layers, I tried raising the temperature of the bed to 80C.
Any guess?
Maybe some have better luck with it, but remember textured plates need Z a little lower to smoosh the filament in the texture. IIRC Bambu calls for -.1mm?
The problem with PETG is that it sticks real well to 2 things, other PETG and the nozzle, so when printing any PETG you should compensate by raising Z.
(this would be entered here)
Tho I note that most, if not all my issues of adhesion usually were with red Petg.
Finally someone who has troubles with a specific filament colour only - was thinking I am alone here… 
I like to cheat, so I won’t deal with my plates the usual way.
Soapy water scrub following by an alcohol clean - plate is clean after that.
Gluestick by applying a few dots, then wiped with a moist sponge that is used for this all the time - full of old glue.
Gives a very even and very thing glue layer on the plate.
If that still won’t make the filament stick I apply some blue painter’s tape on another plate to check if it stick on it.
What won’t stick on painter’s tape is usually too bad quality IMHO.
Last trick out of my cheat box for pesky filaments refusing to stick - PLASTIC PRIMER!
You read correctly but please keep reading correctly for the rest…
Apply a thin layer of glue on the plate and either tape off the cleaning area or include the glue on it as well.
Let dry off properly or speed it up on a warm build plate.
Now grab the spray can (take the plate out of the printer first) and apply just a mist of primer over the plate.
Not like actually spray painting for coverage, just a VERY thin single layer.
The filament will stick to it and it will be the glue stick layer allowing you to remove the print when done, so make sure you won’t leave any dry spots on the plate.
It is a last resort measure and comes with price of having to properly clean the plate every time as the primer will bond with the glue and very quickly you have a bare plate where you printed.
Do not apply a new primer layer after a print without cleaning the plate first and applying a new layer of glue stick!!!
I never had too much problem with petg, probably last one I did was worst where I did diagonal on full bed. Tried I think 3 times before first layer went down ok. Idk if thats cleaning or random chance but it got the job done. PETG-CF 15% and textured bed. On regular a1.
I changed to a different plate I own, both textured, but one slightly younger than the other (both have been cleaned in the same ways) and now, no problems.
Interesting. I have noticed some places on my pei textured plate stick better for petg. I use it for all filaments.
There was a suggestion in a different thread (maybe?) to put down 1 layer of pla at a hot temperature to help clear the bed of contaminants.
I haven’t tried that but I also don’t have adhesion issues for what I do.
I will be trying a different thing. I used a plastic stiff brush (usually used to scrub dishes) since I read there might be glue residue in the “pores” of the plates. I will see if it brings back the older plates for Petg
I also saw to turn off the aux fan. Why would it help adhesion?
Some recommendations are to turn off the part fan for more layers than 1 (which is default I think for most petg) It might help, I haven’t tried.
TBH I went to petg-cf and it doesn’t have nearly as many problems as petg.
