I thought it was just a bird outside, but it is actually the printer! I’ve got prints distributed all over the build plate for this particular print, and it’s that high-pitched “rubber” squeak, so could the LPU be sticking slightly on the bottom of the tank film? I hope this isn’t the case, because squeaking inherently means a bunch of stops and starts (producing the frequencies heard) which might knock things out of whack.
Should I abort the print to investigate further, or can I let it finish? About 3.5hrs to go. I’m inclined to let it continue, as it sounds like a non-destructive contact squeak rather than grinding or squealing.