MA Portal Delta Pro, User Manual

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Nozzle diameter : diameter in millimeters for the extruder’s nozzle. Normally 0.4 mm;

[Retraction] Length : set the length of raw filament to be retracted when retraction command is sent. 4 -
5 mm is optimal;

Lift Z : how high should the extruder be lifted up above the object(s). Normally 1 - 1.5 mm;

Speed : the retraction speed of the filament. 30 - 50 mm/s is recommended;

Extra length on restart : rarely needed. Use when there is no or very little filament extruded after
continuing the layer on different spot;

Minimum travel after retraction : do not retract the filament if the head has to move less than the
specified value;

Retract on layer change : usually needed to get prettier perimeters;

Wipe before retract : tries to minimize blobs whenever retracting. Usually not needed.