That’s the old saying but, at least in 3D printing, I don’t think it’s true. You know how, when the nozzle is too close to the printbed & it prints a really thin, almost transparent layer, and it’s virtually impossible to remove?
I was thinking about that & got to wondering about something. This “removal” problem doesn’t seem to exist with thicker prints, not even 1-layer bed leveling test prints. What if, somehow, I could just make that too thin layer be thicker? Maybe I could then remove it from the bed.
So, I brought one of those 1-layer 20mm X 20mm test prints into Cura & scaled it up so it would more than cover the area that has the too-thin printing. Then, after correcting for the nozzle being too close to the printbed, I printed the expanded test print on top of the too-thin layer.
It worked. Almost all of the layer that was too thin came off, restoring the printbed to almost new condition. Since this was on a fairly pricey PEI coated spring steel sheet ( ~ $50 US), I was very glad it worked. Kinda made my day ?
Anyway, I posted about it because it’s something others might find useful. It would be great to hear it works on other types of printbed.
ps: I think it works because the new filament melts into & bonds with the thin layer, turning it all into 1 layer.