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Problem with outerwall not printed

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Looking at the gcode, the extrusion lengths used while printing the central hub part are pretty small, here's an example:

G0 X106.173 Y103.902 Z2.1
G1 F3118.4 X106.507 Y103.704 E0.00639
G1 X106.892 Y103.506 E0.00713
G1 X107.245 Y103.349 E0.00636
G1 X107.618 Y103.207 E0.00657
G1 X108.017 Y103.08 E0.00689
G1 X108.405 Y102.98 E0.0066
G1 X108.788 Y102.903 E0.00643
G1 X109.191 Y102.846 E0.0067
G1 X109.597 Y102.812 E0.00671

I wonder then if it's a problem with extruder resolution? Do you know how many steps/mm your extruder is set to?

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OK, so that's the problem - the smallest amount of filament you can extrude is about 0.01 mm but the amounts being asked for (as shown above) are smaller than that. If you turn off the relative extrusion mode (it's in the special modes section) you may find that your model becomes printable. Even so, the surface quality is likely to be rough due to the poor resolution of the extruder. I don't know what printer you have but fitting a geared extruder and/or using more microsteps on the extruder stepper will improve the resolution. Just by comparison, the geared Titan extruder I am currently using is running at 400 steps/mm. Hope this helps.

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