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1.4 The extruder is clogged
If none of the above suggestions are able to resolve the issue, then it is likely
that your extruder is clogged. This can happen if foreign debris is trapped inside
the nozzle, when hot plastic sits inside the extruder too long, or if the thermal
cooling for the extruder is not sufficient and the filament begins to soften outside of
the desired melt zone. We successfully used relative diameter drill (or relative
diameter copper line of electric wire) to unclog extruders by feeding it into the nozzle
tip. You need to heat the extruder to 200 ℃ when you do this. Attention not hurt by
the hot extruder. Please contact your printer manufacturer if you need disassemble
the extruder.
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