This content has been automatically translated from Ukrainian.
Retraction in 3D printing is the process of pulling the filament back into the extruder nozzle to prevent plastic from leaking during the movement of the print head without extrusion.
If the head moves from one point to another without printing, and the filament is not retracted, thin strands of plastic may appear between the parts (so-called "stringing" or "spider webs"). Retraction helps to prevent this.
Key retraction parameters:
- Length (how far the filament will be retracted)
- Speed (how fast it will retract)
- Retract speed (how quickly the filament is fed back before printing)
Too large a retraction can cause problems, such as clogging the nozzle, while too small will not solve the stringing issue. Optimal values depend on the printer, filament, and printing temperature.
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