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Wall thicknesses

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mendip_discovery:
Somthing I have yet to get my head around is wall thicknesses.

So I have a 0.4mm nozzle. So I assume I want wall thicknesses of 0.4mm or multiples of 0.4mm as the printer can't print a 0.3mm or a 0.5mm. Is it as simple as that?

ataradov:
You can have walls that are not multiple of the nozzle size and it will try to under extrude. The result would depend on the printer and the wall printing order setting (inside first or outside first). Generally don't worry about the exact sizing unless you have specific issues printing.

You can also download the slicer software and see in the simulation what it is going to do.

thm_w:
Prior to Cura 5, you'd want to optimize wall thickness to your *line width* setting. Which may be the nozzle size or may not.

Now it doesn't really matter, just set your line width to 110-150% of nozzle width, depending on your preference, and the slicer will vary the line width to a lower number to get a good connection.
As ataradov says, preview the slice to see if it looks ok.

ataradov:
I tried in Prussa slicer and it does not visually show lower extrusion rate in the preview, it just shows the integer number of passes, but in the resulting g-coge you can see varying extrusion rate.

Whales:

--- Quote from: ataradov on October 16, 2023, 08:48:22 pm ---I tried in Prussa slicer and it does not visually show lower extrusion rate in the preview, it just shows the integer number of passes, but in the resulting g-coge you can see varying extrusion rate.

--- End quote ---

Prusaslicer can do this, the UI is different to the rest of the program so it's easy to miss.

1. Slice the part
2. Look for the "Legend" semi-transparent black and orange UI that overlays the 3D view
3. Change "feature type" to "width" or "volumetric flow rate" (the former is probably more useful because it's not affected by XY speed)

The 3d view will now colour-code the sliced lines.

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