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 oozing 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 (commonly referred to as "stringing" or "spider webs"). Retraction helps to prevent this.
Key retraction parameters:
- Length (how far the filament will be pulled back)
- Speed (how quickly it retracts)
- Prime speed (how quickly the filament is fed back before printing)
Too large of a retraction can cause problems, such as clogging the nozzle, while too small will not resolve the stringing issue. Optimal values depend on the printer, filament, and printing temperature.
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