Been printing for a long time, P1S about a month old. Prints were perfect for quite a while, swapped nozzle to a 0.2 and did some miniatures with varying success using PLA meta (multiple models on one plate lead to one model failing and nozzle dragging the others with it, print by object also did not seem to work - always a failure early on) however if I printed only one model at a time it usually came out flawlessly. I swapped back to my 0.4 to print some larger items and after 3-4 prints I got a massive blob from the PLA meta somewhat randomly. After cleaning it up, things would not print at all with the PLA meta. I swapped to PLA+, Bambu Basic, and some Elegoo PLA and now nothing will adhere to the build plate. At the same time, a bit of a scraping sound developed when the print head went to the back of the chamber. 90% of the time the primeline will curl and pull into the print, I tried a benchy off the SD card and was able to get a few layers down before the nozzle dragged it off the print bed somehow.
So far I have:
-Cleaned all rods and z axis of debris
-used IPA to wipe and clean the vertical rods and carbon rods
-added grease to all z axis roads.
-checked all bearings for debris (all squeaky clean)
-declogged nozzle from the bottom with needle, did a cold pull as well
-checked bowden tube and replaced it for the hell of it
-tried calibrating flow rate, was actually able to get the lines down and a k value for different filaments
-tried printing with door open, lid open, both open, both closed, adjusting auxiliary fan speed from 0 all the way back to 70
I have simply been trying to print a calibration cube on 0.2 layer height standard preset settings for Bambu Basic PLA and no luck. adding grease seemed to make the scraping sound a bit less. still not able to even print a simple calibration cube.
yes, i have cleaned the build plate: dawn dish detergent and a tooth brush, IPA and a microfibre cloth, windex.
As far as adhesion… it likely your bed is contaminated. I know you washed it, but you should probably do it again but just use soap and water and dry with paper towels. 99.9% of the time, if your purge line peels up and goes with the print head, that area of the bed has some finger oils on it.
A second potential issue with bed adhesion is the bed leveling. Many people uncheck the bed leveling and then change beds or something else. Make sure to check the bed leveling routine before starting the print, at least for a print or two.
On the odd noise, make sure your bed is properly installed. I once had an odd noise and failure to start a print because the bed was very slightly fouling on the rear of the chamber. The plate being slightly askew meant it hung up on the plastic rear panel. Double check that is not your problem.
That was my first thought, but the results are very inconsistent. I’ll try cleaning again, but I’ve read the threads about contamination and tried to go as scorched earth as I could on the bed with a tooth brush / dish soap, tooth brush / ipa, tooth brush, windex. Scrubbed with microfiber cloth as well. I have been printing a calibration cube over and over, and 50% of the time I’m getting a crisp prime line, crisp layers, and then complete collapse and nozzle drag at about 10 layers. I’ll take some pictures at lunch.
seems like the interior might have a hole, letting in air to the print so that it stops printing for a few seconds and then prints air, so it falls off. Idk if this is a real thing but I heard it from a friend.
I think I solved it. Temperature has dropped significantly in the past week, cold basement and I believe the auxiliary fan was blowing too much cold air onto the print (prime curling on the left side). Turned the fan down to 0 for prints and I am back to normal. I did also give some extra scrubbing to the part of the build plate where the prime line goes down incase it was indeed contaminated but was still getting curling until I turned the aux fan off.
Out of curiosity how cold is your basement? I would have thought the P1S with its enclosure would be less sensitive to temperature and humidity changes of the environment (i am also a print noob). I plan to put mine in the basement eventually too and want to avoid the same issues if I can!
