PVA brakes off

[jespersentryk 0]

I'm having trouble printing with Ultimaker's PVA support material. It wíll not stick to the PLA filamant when printing with support. It's being pulled off, jamming the print job - nomatter printing incl. tower og not. Wrong support material? Temperature adjustment?

Suggestions?

[fabreax 15]

PVA don't stick to the PLA ! Try Polymaker Polysupport (50% infill support), it's not dissoluble but works well and print speed is higher (50 mm/s) !

Edited February 28, 2017 by Guest

[krys 206]

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!

[fabreax 15]

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.

[krys 206]

Yeah, I could see inside of a part being more difficult. I have not tried that yet.

[fabreax 15]

I have tried with many fails. I have removed PVA supports inside the part (supports from build plate only).