Hi, This is a cap for a propane tank and it has an Acme-thread.
Latest version of three Slicers, (.appimage) running under Ubuntu 16.04.
From Left to Right, the pic shows sliced with Cura, Slic3r-PE and Slic3r.
Slic3r and Slic3r-PE both have lumps on the threads. All three have the same settings for Layers, speeds, Retraction etc.
I **think** it has something to do with Slic3r's Retraction (5mm at 40mm/s) as when printing, it pauses momentarily about where each lump is.
I really prefer Slic3r to Cura but obviously this is not an option. Is this something I can tune out or not? If I can, how?
Thanks
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