Robo E3 Clogged Extruder Nozzle

Clogged Nozzle

• Problem

- Thumping sound

- Filament not extruding

- Stringy inconsistent print layers

To unclog your extruder nozzle, first try to unload filament. Refer to our Loading/Changing Filament article if you do not know how to do so. If you cannot unload the filament, you may need to clip it with wire cutters as close to the stepper motor as you can in order to separate the filament tube as instructed in the following step.

Once unloaded, remove the filament guide tube from the top of the printer by pressing down on either the black plastic piece or gold piece pipe joint that connects the filament guide tube to the extruder assembly. 

While the extruder is still preheated, use the unclogging tool to try to push the filament through the extruder. If this doesn't work, try heating the end of the unclogging tool with a lighter before pushing the filament through.

If you cleared any filament out of the extruder, reload filament and try to print again.

If you were unable to clear any filament, you may need to replace your extruder. If you cleared filament but you are still getting poor print quality or no filament through the extruder, you will have to replace your extruder. To do so, follow our Replacing Your E3 Extruder article's steps.

Related questions:

Do we need to do extruder calibration again after replacing nozzle?

Yes, do extruder calibration again to ensure high print quality as minimal error may be caused by extruder installation.

How to solve if "temperature is abnormal" error is returned after replacing nozzle?

The "Abnormal temperature" error indicates that the extruder sensor can not be read. Please check that the nozzle is correctly installed. Use your fingers or a pair of pliers to try to push the extruder further up into the housing until you hear a click. The black clips should be flush with the edge of the extruder assembly.

Then, turn the printer off and back on again.

Can we use other brand filament which is not produced by Robo?

Robo E3 supports normal ABS and PLA filament but different brand filament have different specifications. We only recommend Robo PLA for best results.

Other brands of filament are allowed but not recommended for using. If that causes extruder clogging or bad printing quality or other failure, Robo will take no responsibility. These problems are not in the warranty of Robo .