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6.2 Retraction speed
Retraction speed determines how fast the filament is retracted from the
nozzle. If you retract too slowly, the plastic will slowly ooze down through the
nozzle and may start leaking before the extruder is done moving to its new
destination. If you retract too quickly, the filament may separate from the hot
plastic inside the nozzle, or the quick movement of the drive gear may even grind
away pieces of your filament. There is usually a sweet spot somewhere between
30-50 mm/s where retraction performs best. Cura has already provided many
pre-configured profiles that can give you a starting point for what retraction speed
works best, but the ideal value can vary depending on the material that you are
using, so you may want to experiment to see if different speeds decrease the
amount of stringing that you see.
6.3 Temperature is too high
The next most common cause for excessive stringing is the extruder
temperature. If the temperature is too high, the plastic inside the nozzle will
become extremely viscous and will leak out of the nozzle much more easily.
However, if the temperature is too low, the plastic will still be somewhat solid and
will have difficulty extruding from the nozzle. If you feel you have the correct
retraction settings, but you are still encountering these issues, try decreasing
your extruder temperature by 5-10 degrees. This can have a significant impact
on the final print quality. You can adjust these settings through Anet3D control
panel by turning the knob. First press the knob to enter the menu, choose
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