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Editing Step 33 —

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In your slicer of preference find the retraction settings. In Slic3r this is in printer settings.

Start with a retraction length of 1mm

If you experience blobs or stringing on the surface of the print increase the retraction length to 2mm.

Do not increase the retraction length more than 2mm as this can lead to molten plastic being pulled into the heat break, increasing the likelihood of jams.