Actual 0.5mm thin wall 20 mm box

by Jerry_XYZ, published

Actual 0.5mm thin wall 20 mm box by Jerry_XYZ Dec 9, 2012
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This is a calibration object, similar to other thin wall box objects. The walls of this model really are 0.5mm thick. Despite their name, similar objects previously published here apparently have 0.25 mm thick walls. With a 0.5mm nozzle, it seems reasonable to try printing walls actually 0.5mm thick.


Print this and measure the walls to verify that your printer makes walls the correct thickness. Adjust your slicer program's extrusion factors to get the correct wall thickness.

More detailed calibration guidelines have already been posted by people much better at this than I am :)

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According to the Slic3r manual [0] the extrusion width should be 1.05 * nozzle diameter minimum because the filament won't stay round. It becomes a little bit flat when it sticks on the surface from the most recent layer or heat bed. So printing with a 0.5 mm nozzle will result in 0.525 mm walls or thicker according to the extrusion width.

[0] "[...] a thin extrusion width, equal to nozzle diameter * 1.05. This is considered the thinnest safe extrusion width."
Source: http://manual.slic3r.org/advanced/flow-math

Should I expect a 0.5mm wall thickness with a 0.5mm J-head nozzle, or slightly larger? I'm getting about 0.62mm. Also, when measuring the outside of the box sides with calipers, should they be 20mm end-to-end, or 20mm + wall thickness?