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prusa3d / PrusaSlicer

G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)
https://www.prusa3d.com/prusaslicer/
GNU Affero General Public License v3.0
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Wall thickness 12% too low #6480

Open DerInternets opened 3 years ago

DerInternets commented 3 years ago

Version

2.3.1+win64

Operating system type + version

Windows 10 Home Version 10.0.19041 Build 19041

3D printer brand / version + firmware version (if known)

Creality CR-10S with Bigtreetech SKR 1.4 Turbo running Klipper v0.9.1-406-g317402d5, 0.4mm Nozzle

Behavior

  1. Slice test-cube with 0 top layers, 0% infill, single perimeter, spiralized/vase mode. Set extrusion width to 0.4mm for all options in Advanced --> Extrusion width.
  2. Measure length and width of resulting cube --> within 0.05mm of planned length/width
  3. Measure wall thickness: Wall thickness is around .35mm instead of .4mm.

This is an issue as I would like to use a single walled print + calipers to calibrate my extrusion multiplier (as described here: https://help.prusa3d.com/en/article/extrusion-multiplier-calibration_2257).

The issue of walls being printed too thin prevents me from doing that because increasing the extrusion multiplier in PrusaSlicer until I get a Wall thickness of 0.4mm will result in severe overextrusion on the rest of the print.

When slicing with Cura 4.9, the same extrusion multiplier that will give me .35mm walls in PrusaSlicer repeatedly results walls of .4mm thickness, using the same printer, same filament, same calipers.

I tested several times with both slicers to ensure that it was not a problem of me measuring.

3mf-file can be found here: https://filebin.net/471bx4oazvpvy3qs

rtyr commented 3 years ago

Your 3MF link doesn't work, but I don't see any issue with PrusaSlicer in this regard (and you are the only one reporting something like this). Of course there can be difference between two slicers, you should always calibrate the multiplier with the slicer you intend to use. I am not sure what exactly do you mean by "severe overextrusion", but it will be likely related to your specific hw/fw/settings.