Failed whistle - Filament layer squiggly / No bed adhesion
After hundreds of successful prints, my Original Prusa I3 MK3 had a failed print (lost bed adhesion, big clump of filament pushed around bed for a while).
I cleared the failed print, but next prints failed bed adhesion and filament profile went squiggly instead of smooth (see photo).
I tried:
-- cleaning the bed with alcohol wipes,
-- replacing the filament,
-- cleaning, then replacing the nozzle with a brand new one
-- adjusting z-height
-- adjusting head and bed temperatures,
-- resetting temps to factory std, and
-- full (re-)calibration wizard
With each attempted remedy, I tried a new print, but no joy.
See the attached picture of my latest attempt to print the Prusa whistle (demo STL). Not only is there no bed adhesion for the whistle, but even the little strip it prints at the front edge of the bed at the start of the print is squiggly, not smooth. I'm at a loss for what to try next. Suggestions?
The two common causes are:
Incorrect first layer offset calibration - it does need to be redone every few months as the nozzle wears and after nozzle replacement : you say you have done this.
And build-up of insoluble filament residues on the print sheet. This is the most likely in your case.
The regime we generally recommend is:
Clean with IPA between prints.
At the first hint of a problem, use dishwashing detergent (Dawn/Fairy) and HOT water.
If this is not enough rub neat dishwashing detergent into the sheet, wait a few minutes then rinse clean with VERY HOT water.
If that's not enough use acetone: *On the smooth sheet only* once or twice a year at most.
All this assumes fingerprints, perhaps stray sugars or light lubricants but if you are using aerosols, sprayers, laser cutters, welding kit or similar in the same workshop then there might be other cleaning agents required. The sheet must be clean.
Cheerio,
RE: Failed whistle - Filament layer squiggly / No bed adhesion
Thank you very much! I'll try these steps today!