Frequently Asked Questions

appears when the extruder initially begins printing the perimeter.
If the defect does not occur until the end of the perimeter
when the extruder is coming to a stop, then there is a different
setting to adjust. This setting is called coasting. You can find it
right below the retraction settings on the Extruder tab. Coasting
will turn off your extruder a short distance before the end of the
perimeter to relieve the pressure that is built up within the nozzle.
Enable this option and increase the value until you no longer
notice a defect appearing at the end of each perimeter when the
extruder is coming to a stop. Typically, a coasting distance
between 0.2-0.5mm is enough to have a noticeable impact.
(2) Avoid unnecessary retractions
The retraction and coasting settings mentioned above can
help avoid defects each time the nozzle retracts, however, in some
cases, it is better to simply avoid the retractions all together. This
way the extruder never has to reverse direction and can continue a
nice uniform extrusion. This is particularly important for machines
that use a Bowden extruder, as the long distance between the
extruder motor and the nozzle makes retractions more troublesome.
To adjust the settings that control when a retraction takes place, go
to the Advanced tab and look for the “Ooze Control Behavior”
section. This section contains many useful settings that can modify
the behavior of your 3D printer. As was mentioned in
the Stringing or Oozing section, retractions are primarily used to
prevent the nozzle from oozing as it moves between different parts
of your print. However, if the nozzle is not going to cross an open
space, the oozing that occurs will be on the inside of the model