This content has been automatically translated from Ukrainian.
Retracting in 3D printing – is the process of pulling filament back into the extruder nozzle to prevent plastic from leaking during the movement of the print head without extrusion.
If the head is moved from one point to another without printing and the filament is not retracted, thin strands of plastic may appear between the pieces (called "snot" or "web threads"). Retracting allows you to prevent this.
Main parameters of the retract:
- Length (how far the filament will get involved)
- Speed (with which he will be drawn)
- Return (how quickly filament is fed back before printing)
Too large a retract can cause problems, such as clogging the nozzle, and too small a – will not solve the thread problem. Optimal values depend on the printer, filament and printing temperature.
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