Visible seam or zipper
A vertical line of bumps or a small gap runs up the side of the print where each layer starts.
Also described as seam, z seam, zipper, seam line, line up the side, scar on wall
Try these in order
Most likely and quickest to check first. Change one thing at a time so you know what fixed it.
Seam in a visible place
Every layer has to start somewhere. You can only choose where.
- Set the seam to 'rear', or paint it onto a hidden edge or sharp corner in the slicer.
Too much plastic at the start and end of each loop
- Tune pressure advance (linear advance).
- Turn on wipe, and try a small amount of coasting.
Retraction settings
- A gap at the seam: lower the retraction or add a little extra restart distance. A bump: the reverse.