I’m printing a custom bracket and it’s weird that every time I print it, the bottom shrinks. There is a 5 mm thick shell at the bottom, and when it goes to the vertical wall, it’s just not flush with the bottom, the print seems to shrink below the 5mm height. Any idea why this is happening?
I’m using the official PLA basic without any modification to filament settings (strength tweaked, but doesn’t make much difference. I also tried all default settings of 0.20mm Standard and still same issue). The machine is brand new so I don’t expect any worn parts.
Large solid infill areas will have a far larger thermal shrink than the walls above it thus the appearance of the those steps.
A radius on the internal transition can help with the appearance since the step will get a bit smoothed out.
Printing infill first (quality - advanced) allows for the infill to cool down and shrink prior to the application of the outer wall therefore reducing the dimensional change however this reduces the anchor overlap between infill and wall therefore could result in a reduction of adhesion between them or even create gaps thus it may require an increase of the infill-wall overlap percentage (strength-advanced).
