Unretract

Pushes filament forward after a retraction to prime the nozzle. Always pair with a preceding Retract block.

Block

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Parameters

distance (mm): How far to prime filament forward. Should match the Retract distance.
speed (mm/s): Priming speed. Typical: 25-50 mm/s.

How it works

Unretract outputs G1 E{distance} F{speed} to push filament forward into the nozzle after a retraction. The distance should match the preceding Retract block so the filament returns to its original position. Use immediately before the next extrusion to ensure proper flow.

G-code output

Command	G-code
Unretract	G1 E{distance} F{speed}