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UM2 over-extrusion

bbuild

By bbuild
in UltiMaker 3D printers

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bbuild

bbuild 0

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Posted · UM2 over-extrusion

I am having trouble with a UM2. It massively over-extrudes on layers without much area. When printing normally on layers with a bigger area, the feed motor constantly skips backwards, more than once a second.

The PLA filament is all the correct cross-section, and I've tried various temperatures.

This over-extrusion is causing lots of secondary problems such as clogging of the head which mean that the printer is really unreliable.

Is there something I should check/measure on the PCB for the driver for this motor?

bbuild

 

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