Why is my print deformed or rising off of the textured PEI plate at this one end? I’ve printed this item multiple times, and it seems to happen every time on this one end.Im using Bambu PLA gray filament and the standard default of “.20mm Standard @BBL X1C” setting. My nozzle is a Bambu Labs X1 Carbon 0.4 nozzle.Ive tried printing with the door open and with it closed. Same issue. The textured PEI plate is clean. No glue was used. This issue doesn’t seem to happen on my other prints but will say this print is one of the biggest Ive done so far. it took about 2 hours and 15 minutes to print.
The larger the print the more likely you are to have warping; I have trouble with larger flat items as well on my old Prusa. Search online for ways to combat warping and you’ll get a bullet list of items to work on, this list should work across different brands of printers and the problem is the same.
The basic problem is the model is not adhering with enough strength in the corners. As more filament is added (and dries on top) you could see some lifting.
Alain.vd was spot on. Turned off aux fan and it printed perfect. Thanks to the others that responded with suggestions. I guess the take away here is that it you have huge prints, turn down or off the aux fan.
I hear your pain, I had a similar issue but with a different filament. It seemed to only be one brand of filament and even specific prints only. I turned off the auxiliary fan and I saw a huge decrease in the warping. I ended up putting in specific gcode to ensure the aux fan was off, which is now my default. Every now and then I do turn it back on thought, like if there are a bunch of overhangs, it seems to help increase the quality of those prints.
I had this exact same problem. In addition to the great suggestions above, you can also turn the settings in the slicer setting/filament settings and turn off the cooling for the first few layers. I had the exact problem you described and this helped a great deal. Don’t overdo it though and set it it to too high a level such as above the first 10 layers because that will invite elephant footing on the print.
You might also check your brim-object gap found in “other” in the objects menu and make sure it’s set to zero. From the photo you supplied it looks like you are getting separation between the brim and the print. If you already have that distance set to zero and you’re still getting separation, consider adding rafts to your print. Yes, rafts are a pain but if you use multiple layer rafts it can aid in adhesion.
And last but definitely not least. Make sure you wipe your plate with some degreasing agent. You would be surprised at how much skin oil is present on the PEI plate. Sure, it’s obvious on a smooth plate like the engineering plate but definitely not obvious on the texture PEI plate. My degreasing agents of choice are 99% Isopropyl alcohol in a spray bottle using shop paper towels or simple Windex also works great.
Also, if you haven’t already done so, consider performing a first layer print test. I’ve had good look with that. If there is any contamination on the printing plate or warping or tuning issues, this single layer sheet is very unforgiving and readily displays the problem areas. Think of it as a map to your print plate, good, bad and ugly.
And last but not least when it comes to a trouble shooting technique. Don’t rule out a filament problem. I’ve noticed that when I use Matte filaments as an example, they tend to separate from the plate much easier. Make sure you try another filament to rule that out too.
I had other issues with the extruder when turning aux fan off. Instead I turn it down to 30 and bump up the bed temp and as a last resort i add glue stick which usually fixes the issues.
