Z-seam initial layer #19509
Labels
Status: Triage
This ticket requires input from someone of the Cura team
Type: New Feature
Adding some entirely new functionality.
Is your feature request related to a problem?
For small, thin, parts (only a few line widths wide), the position of the z-seam on the initial layer can have a large influence over bed adhesion. If it is in the middle of a long wall, the nozzle reverses direction an extra time compared to if it starts at an 'end' corner, thus increasing the risk of delamination.
Again for small parts, the z-seam a very noticeable feature, so I like to use the 'random' option for the rest of the model, so as to avoid spending ages with a Stanley knife removing the seam after printing.
Describe the solution you'd like
I'd like a setting to add a z-seam control for the initial layer separately from the other layers.
Describe alternatives you've considered
Other settings which influence bed adhesion (initial layer speed, enabling raft, etc.) can generally compensate enough to allow the print to not delaminate, but this comes at significant expense to material usage and print time — a raft easily triples the print time of a small part.
I am in the process of writing a post-processing script which can move the layer start to a user-specified location on a per-layer basis, but this is only limited in scope as incorporating retraction combing and suchlike is far beyond my ability with python code. Hence, if this could be incorporated into the main cura engine that would be much preferable than me trying to bodge it.
Affected users and/or printers
This would benefit all printers. It would be particularly helpful to hobbyist users, as they tend to value lower material usage and print time over meddling around with print settings, and to users who print small parts, as these parts are most susceptible to delamination.
Additional information & file uploads
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