Pva does not stick on PLA, this is a known problem. You can try to use the horizontal expansion settting, until the pva touches the buildplate from the buildplate up.
I always avoid pva as much as possible, and use polymaker polysupport, whenever i can. Easier to print, no messy water proces.
Greatings,
Rudy
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BlackCloud 1
I'm having similar issues. PVA is very messy. I've adjusted retraction settings and that helps some, but it never prints cleanly. ON a complex model these blobs and threads end up getting into the model itself as the nozzle drags the crud all over.
Anybody getting clean PVA supports?
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