Yes you are right. But those come off with the wipe of my thumb. Anyway I don't know what benefits combing provides. I just tried it as part of my PETG stringing attack. I'll disable it for my coming prints.
I wonder if coasting volume will need to be changed. In any case I'll try Linear Advance when I understand Marlin better.
Also I've been watching this print and it's doing fine now. It seems to only happen near lower layers whether it is traveling over printed area or over brim/glass/brim. The travel move happens successfully and leaves no trace of stringing. The lower layers print much slower.
I just noticed initial layer travel speed is only 100mm/s I'll raise all travel to 200mm/s and disable combing and see how it goes.
Edited by sr1329
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Smithy 1,146
Usually I turn combing off when printing PETG, otherwise I get a lot of zits.
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