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User Manual – FELIX Pro 1
Rev 3
www.FELIXprinters.com
[email protected]
16.3
No filament is coming out of extruder
The most common causes to get a clogged hot-end are (ordered from most common to least common):
Chosen print temperature too hot.
Try printing at the recommended temperatures for the chosen filament. For instance, printing PLA at 210
degrees might work in some cases, but it is critical. The top part of the hot-end will become near the
critical 60°C where the filament becomes too soft, too soon and causing a clog.
Fan cap not closed.
The front fan cap should be flipped closed all the time when the extruder heaters are active. Failure to do
so can cause the cooled part of the extruder to become hot, and the filament will soften or melt too
early, causing jamming.
Hot end not really clogged Sometimes the extrusion is partly blocked because the nozzle is too close to
the bed or to the printed object. Please check if the z-homing of the printer is correct. Check if the
printed object is deforming in such a way that it moves too close to the nozzle.
Bad quality filament.
Make sure to get good quality filament. Dimensional tolerances and also bad consistency of the material
itself can cause trouble during printing.
Dust collector not applied around the filament.
Filament attracts a lot of dust, which can potentially all come into the hot-end. In some dusty
environments this could cause a clogged hot-end within a few hours.
Fragment of previously printed material still in extruder.
If you print a material with a high melting temperature and next a material with a low melting
temperature, it may be that a residue of the high melting temperature plastic causes issues inside the
extruder. Try extruding some (20 cm) PLA filament manually at high temperature (220 °C). Make sure to
turn back the temperature to normal while slowly extruding some more material to prevent it to coal
inside the extruder.
Clog from the inside of the hot-end.
It could be that a big dust particle or debris buildup inside the hot-end tip causes clogging from the inside.
You could try the dip-and-pull method:
Insert PLA in the hot end. Heat the hot end to about 220°C. Try to extrude some material.Set the hot end
temperature to 110°C. Disable stepper motors (can be done via the Quick settings menu on the printer
itself). Wait for the extruder to reach the set temperature. Pull out the filament in one smooth and quick
move. With some luck, the clogging material is attached to the solidified end of the filament.
If that fails, you can try hand-drilling the nozzle opening with a drill that matches your nozzle diameter.
The best is to do this when the extruder is warm, but be careful! We sell some small diameter drills in our
web shop.
Hot-end parts are not fixed together properly.