PVA not sticking to PLA adhesion layer

[Bobr 0]

I just got my Ultimakes 3 ... 4 days ago... after my first print that took 22 hour (wow it turned out nice) it work without a problem (that was my first print)... I removed the PVA and put it away. Yesterday and today I tried to print the same object again... and now the PVA is not sticking to PLA adhesion layer. I tried printing without an adhesion layer 99% of the PVA stuck to the glue... but some of the PLA part came of of the glue.

I have cleaned the BB core... anyone have information how to get PVA to stick.

Thanks

BobR

[DeathMachine 23]

Have you tried hair spray?

[drayson 75]

Where have you stored the PVA? Could it be possible that it attracted some moisture/humidity? PVA is a pain if not stored correctly... :-)

[IRobertI 521]

When you say "adhesion layer", do you mean the "Build plate adhesion extruder" setting? The "official" recommendation is to set this to the the second (PVA) extruder and that's what I've been doing and it seems to work well.

Do you have a picture of what the model looks like in cura? I think that might help figure out what's going on.

[ultiarjan 1,223]

Where have you stored the PVA? Could it be possible that it attracted some moisture/humidity? PVA is a pain if not stored correctly... :-)

 

tip;

https://www.youmagine.com/designs/drybox-for-pva-ultimaker3

[Bobr 0]

Thank you for all the information... I will try and let you know.

However it could be that because the PVA was loaded on the printer for the 22 hours of print time + 3-4 hours after printing ... I guess it could have picked up some moisture... I did put in a zip-lock bag with 2 moisture killer packs.

Sorry did not take a picture of the second try that would not stick...

This is a picture for the successful first print print.. wow I was so happy... as i could never print this object on my other printer. http://www.oaklawnlodge1166.com/bobr-002.png

However I did try a different object with only glue... the PVA worked but one or two parts in PLA came up of the glue (see red circle). http://www.oaklawnlodge1166.com/bobr-001.png

I try to glue the 1-2 parts back in place while it was printing... of course that did not work out so good.

Again thanks for all the help.

[DeathMachine 23]

I use Aqua net hair spray, and you can use too much.