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3. Not Extruding Enough Plastic
Cura includes some settings used to determine how much plastic the 3D printer
should extruder. However, because the 3D printer does not provide any feedback
about how much plastic actually leaves the nozzle, it’s possible that there may be
less plastic exiting the nozzle than what the software expects (otherwise known as
under-extrusion). If this happens, you may start to notice gaps between adjacent
extrusions of each layer. The most reliable way to test whether or not your printer is
extruding enough plastic is to print a simple 20mm tall cube with at least 3 perimeter
outlines. At the top of the cube, check and see whether the 3 perimeters are strongly
bonded together or not. If there are gaps between the 3 perimeters, then you are
under-extruding. If the 3 perimeters are touching and do not have any gaps, then you
are likely encountering a different issue. If you determine that you are underextruding,
there are several possible causes for this, which we have summarized below.
3.1 Incorrect filament diameter
The first thing you need to verify is that the software knows the filament
diameter that you are using. You can find this setting by clicking “Basic” and going
to the “Filament” tab. Check to make sure that this value matches the filament
that you purchased. You may even want to measure your filament yourself using
a pair of calipers to make sure that you truly have the correct diameter specified
in the software. The most common values for the filament diameter are 1.75mm
and 2.85mm. The diameter of Anet3D printer filament is
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