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Clogged Extruder

The N-series printer melts and extrudes many kilograms of plastic over its lifetime through a tiny hole that is only 0.4mm in diameter. The impurities in the filament, dust in the air, improper extruder settings and other reasons may cause the extruder clogged.

Check the following things to solve the problem.

  • Manually push the filament into the extruder

One of the first things you may want to try is manually pushing the filament into the extruder. Select “Tune” tab on screen and heat your extruder to the appropriate temperature for your plastic. Lightly use your hands to help push the filament into the extruder. In many cases, this added force will be enough to advance the filament past the problem area.

  • Reload the filament

If the filament still isn’t moving, the next thing you should do is unload the filament. Select “Tune” tab on screen and choose unload for the problem nozzle to retract the filament out of the extruder. As before, you may need to apply some additional force if the filament isn’t moving. Once the filament is removed, use a pair of scissors to cut away the melted or damaged portion of the filament. Then reload the filament and see if you are able to extrude with the fresh edge.

  • Clean the nozzle

If you weren’t able to extrude the new section of plastic through the nozzle, then it’s likely you will need to clean out the nozzle before proceeding. This can happen if foreign debris is trapped inside the nozzle, when hot plastic sits inside the nozzle 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. Fixing a clogged nozzle may require the nozzle-cleaning kit. We have prepared two steel strings in the accessory-kit. So please unload the filament first, then preheat the nozzle to 230℃ (for PLA and ABS or higher for PC), then insert the steel wire from the PTFE throat to the nozzle. You can see some melt filament is extruded out from it. If the steel wire cannot work effectively, you can use a fine-needle insert the nozzle through the tip. It may solve the problem form a different direction.