mulder999

Affects Cura 4.7.1 under W64. Method A to reproduce: - Reset all model transformations - Rotate a part 90° around X - Disable uniform scaling - Change Y % to 105% - (Wrong) Z also change to 105% and further increase by 105% each time it receive focus Method B to reproduce: - Reset all model transformations - Rotate a part 90° around X - Disable uniform scaling - Double Y mm value - (Wrong) Z % increases to 200% (it should be Y % at 200%)

Not sure what Cura does but outer dimensions are accurate while inner dimensions are completely off by 0.4mm (2x0.2mm) when using 0.2mm height with 0.4 nozzle. You can see by yourself already with a simple sketch in simulation mode. Make a square of 1.2mm perimeter. With 0.4 nozzle and 0.4 layer height you should have 3 lines side by side, but with with 0.2 layer height you should normally have only 2 (because material get squished on the side of the nozzle). Cura slicer is likely not accounting for that squish properly on the inside. Using a 0.4 nozzle, we could probably attempt to solve it by using 0.6 line width. REM: there is a hole expansion correction settings (expecting 0.2mm) but it is not working for inner part of an open shape.