I am currenlty having big troubles with my Bambulab P1S. It worked fine for months now, I optimized the settings and everything was working great. But suddenly a couple of days ago, it got weird. I really don’t know what to do
For over a week now, my printer has been experiencing a strange issue.
There is no error message or similar indication. I have already checked the extruder for a clog, reset the printer, and reinstalled the Bambulab Slicer. I have tried both my optimized settings and the default factory settings in the slicer. I also tested different filaments, all with the same result. Each time, the same anomaly occurs.
I have made no changes or modifications that could potentially result in that problem – the problem just appeared on its own.
Here’s what it looks like: sometimes the first layer looks fine, then there’s under-extrusion followed by over-extrusion, all within the same part. It’s pretty hard to describe, but there are pictures. I’ve always stopped the print shortly after the first layer since continuing under these conditions would not yield any successful results.
This happens regardless of what part I’m printing; the same issue keeps recurring. Interestingly, on the same spot. I noticed that the part itself always appears heavily over-extruded, while the support structures look normal. But it feels like the nozzle is carving the print, but I don’t know exactly. I find it hard to describe the problem – I have already tried numerous adjustments to the settings, but no flow ratio value has managed to resolve the issue. Likewise, neither re-calibrating the filament nor the printer itself has helped. During the calibration, however, the print quality was very good. There was one print that worked as well, and that was the one I started using the Bambulab Mobile App. This print completed without any issues. I tried printing the same part (the Benchy Boat) with my regular settings and it worked too (without supports). I really don’t know anymore…
Filament used is Eryone PLA Silk and Sunlu PLA+. Both worked fine before.
Here is the link to the .3mf file that is shown on the pictures.
I think the problem first occurred after the last firmware update, but I am not quite sure, could be before that too. (I just try to give as much information as possible)
Either not cleaning the build plate well enough or need to raise the bed temp a bit is my best guess. The pictures definitely look like adhesion issues.
If it feels like the nozzle is carving the print it probably is, this is only after the infill has started right? In that case I would use a non overlapping infill like gyroid.
I will try Gyroid infill, but the most of the filament you see on the pictures are support. I clean the build plate regularly with Isopropanol. The red marks show the part, the rest is support.
Need to clean it with warm water and anti-grease dish soap (IE dawn) from time to time, a few times a week at least imo.
Gotcha on the infill, I thought you were speaking about later in the process. It seems like due to the adhesion issues you get raised areas on the edges that kind of roll up and cause the nozzle to catch.
So I think a good cleaning of the plate with soap and hot water plus raise the bed temp 5 degrees.
When you clean the plate, hot water and dish soap with no additives. Really scrub and rinse with the hot water. It can be hard to get the oil off of a textured PEI plate so you may need to scrub it a couple times. Us a new paper towel to pat it dry making sure not to touch the printing area with your fingers.
A light scuff with a very fine steel wool can also help to rejuvenate textured PEI plates that have adhesion problems. Others have found that magic eraser works for them.
thank you for your input, but I can assure you the adhesion is not the problem, I just started a new print, and it seems to me that die filament sort of rins out of the nozzle from time to time, like its just too much and I think it’s sort of uncontrolled.
The fact that you said ‘it happens in the same place(s) from print to print’ really narrows it down imo:
Build plate is not clean or is too old. They do wear out and your nozzle wipe area looks like its been used quite a bit.
Bed is not heating evenly.
Other things you describe sound like it could be a partial nozzle clog, try some cold pulls or a new nozzle. But this wouldn’t appear in the same places on the plate from print to print unless it is just coincidence.
I cleaned the plate again and turned it around, I haven’t used the other side till now. I set the bedTemp to 65°C for now. I heated the bed and laid my hand on it, as far as I can tell this way, it heats normally. Filament shouldnt be dry, since I managed to print the Benchy (small boat) with no problems. I still don’t know why, it’s pretty frustrating, since the benchy is quite small maybe it has to do something with the build plate, maybe uneven or so. nevertheless the filament worked on it so not dry.
Here is a video I took of my last try. Video 2024-11-05 at 16.50.37.mp4
Second thing I am scratching is a very thick support line… I don’t know how and why the supports sort of shift up or cover each other that way.
I tried again this time with orca slicer. Came out the same, this time with little holes in the print surface. I think it’s sort of a settings thing, but how, if the results are the same with factory print settings?
This is funny because I too spent the better part of a week trying to get a filament to stick properly only to find out washing the plate with Dawn Dishsoap and water fixed the problem totally.
