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jespersentryk

PVA brakes off

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Hi there,

Welcome to the forums! :)

PLA sticks to PVA (once you get your settings right), but PVA does not stick to PLA. See the difference? PVA does not like to be on top. ;)

So, if you have a model where you need PVA to go over top of some PLA, then the current answer is to use the Horizontal Expansion option under Support (assuming Cura 2.3+) and expand the supports out so that all support parts are connected to the build plate. I've used 3-5mm so far, depending on the model.

It seems wasteful of the PVA, but currently that is what it takes to make PVA over PLA work. ... At least as I understand things. I am still learning PVA myself.

Anyway, hope this helps. Good luck! :)

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Hi there,

Welcome to the forums! :)

PLA sticks to PVA (once you get your settings right), but PVA does not stick to PLA.  See the difference?  PVA does not like to be on top. ;)

So, if you have a model where you need PVA to go over top of some PLA, then the current answer is to use the Horizontal Expansion option under Support (assuming Cura 2.3+) and expand the supports out so that all support parts are connected to the build plate.  I've used 3-5mm so far, depending on the model.

It seems wasteful of the PVA, but currently that is what it takes to make PVA over PLA work. ... At least as I understand things.  I am still learning PVA myself.

Anyway, hope this helps.  Good luck! :)

 

Yes ! Sometimes if you need support inside the part, horizontal expansion does not work, and it's impossible to do print PVA on top of PLA.

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