PVA Dual Extrusion Problem

[lewisa3 0]

Hi there,

 

I'm trying to print a part with an overhang and I really want to use PVA as my support material. 

 

I'm not sure if it's my printer or the material itself but it seems like my printer doesn't like printing PVA. I've attached some pictures of how my print when and honestly non of the PVA was sticking to my build plate. I believe that is due to a lack of PVA printed during the brim step. 

 

In Cura it shows the PVA on the brim but when it prints, there is not PVA part of the brim.

 

I've only gotten the PVA to behave once before. I've noticed that whenever my printer tries to print PVA near the build plate, no filament comes out. The print head goes over the correct "tool path" but the PVA material doesn't extrude from the print head.

 

If anyone knows what's going on, please let me know.

 

Thank you!

[Marco133 0]

Hello. I have exactly the same Problem.

do you solved it?

[Framar 38]

Make sure your PVA spool is dry.

[NBull 14]

It looks like the PVA ditten stick to the glass plate. 

 

There have been other threads about the s5 (assuming that your printer) printing air on the first layers from the second core. Which will result in your case in the PVA not sticking on the rest of the print.

 

Try and "enable prime blob" for the second core (PVA)
if it doesn't help. Pull the lever of the second feeder and push the PVA a little bit forwards if possible (until resistance). Do this right when the second core begins to print.
"original tip from: Cymon"