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enough dust is attached to the filament, it can cause a clog as it builds up inside
the nozzle. There are several other possible causes for a clogged extruder, so
please see the clogged extruder description in the Not Extruding at
Start of Print section for more details.
12.4 Overheated extruder motor driver
The extruder motor has to work incredibly hard during your print. It is constantly
spinning back and forth, pushing and pulling plastic back and forth.
This quick motion requires quite a bit of current, and if the printer’s electronics do
not have sufficient cooling, it can cause the motor driver electronics to overheat.
These motor drivers typically have a thermal cutoff that will cause the driver to
stop working if the temperature gets too high. If this happens, the X and Y axis
motors will be spinning and moving the extruder nozzle, but the extruder motor
will not be moving at all. Anet3D printer includes a cooling fan to cool down
temperature for the extruder motor. You can also turn off the printer and allow the
electronics to cool down.
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