I just converted my P1P to P1S. Tech support highly suggests opening the lid and doors when printing PETG on the textured PEI sheet. I have read a number of posts suggesting that the keep the chamber fan on 70% or more and keep the door and top closed and have not had any issues with heat creep.
Have any of you done this and what has been your experience? Also, what bed temperature and filament have you used?
Thanks… Richard
I have an P1P with Vision housing. I often print PLA with closed door and experienced lots of clogging in the extruder. A tipp from this forum says, i should open the door during print. After open the door, the error (clogging) didnt happend anymore.
So i would recommend to open the door while printing PLA and close it with ABS.
I ha e always printed petg with the top on and the door closed. But I also have the chamber fan installed and when I did the ARC enclosure I have to small fans on the back panel so I use them if needed to circulate air .
But yes I have heard of others opening the door and top removal
Thanks for your thoughts.
Here is the most current information.
PLA, PVA or TPU: Door Open and Top Off
PETG: Top off
Although that is their current recommendation I’m not sure if it’s needed or not and I don’t want to test it and try to introduce a clog intentionally right now.
(P1P to P1S conversion user here)
I have noticed when printing PLA the chamber fan is going full speed and the aux fan is set to 70% which makes me believe it’s bringing in air to help cool the chamber but I’m not entirely sure.
Thanks for the update. Very helpful!
how did you get a chamber fan ?? dont you need a new back cover for that ??
That’s a new one for me. There’s a bunch of contradicting info on the Bambu sites regarding that. For example, the product description of the textured PEI plate says NO (Bambu Textured PEI Plate | Bambu Lab EU).
I don’t really know what to believe.
Yes, you do I printed my back cover before bambu had sold the enclosure kit
Now you can just go get the cover for the p1s. On bambu labs has the side panels the back cover etc.
I normally don’t worry about the top and door for PETG. The idea is some filaments can get close to their softening temp in the top of the hot end where the fan is trying to cool it. I’d assume the temp there is close to 45-50C and that is where PLA starts to soften and clog in the hot-end. PETG softens around 70-80C, so its unlikely to see that temp in the cooled area of the hot end, but I guess its possible so Bambu suggests that. PETG is also a weird plastic so there could be other reasons for their suggestion but just note when dealing with opening the printers up, its usually to keep filament from softening and clogging in the cold area of the hot end.
The slicer’s start GCode will have the rules for the chamber fan. For PLA I think its sets the chamber fan according to how hot the bed is set. So for >55C its set to 70% or so. Its cool to take a look and know.
So long story short, the start GCode will determine how hard the chamber fan runs based on bed temp.