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aag

PVA blues

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I hate to admit that I have never been able to print any PVA with my Ultimaker S5. I have no problems with PLA and breakaway. But PVA, it always clogs the print core, immediately. I have tried BB0.4 and BB0.8, and both get clogged. I have cleaned the cores with cleaning filament until I got blue in the face. After cleaning, the PVA extrudes nicely for a meter or 2, and then it clogs again. It drives me crazy. What can I do???

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how dry is your PVA? If it is not dry enough you will get problems. If it is nearly to dry it will easy break. I have no measure system but I start printing if it really easy break "into 1000 pieces" :-) But keep aware that it will not break in the tube.

Edited by zungara
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I kept it for 12 hours in a food dryer with warm air at 60°C, It's not really brittle, but on the test extrusion it does not make the cracking sounds typical of steam.

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Dry it again, PVA is a great material for support structures, bad really a mess when it comes to humidity. If you have more than 40-50% humidity and plan to print a longer job, you should consider to buy or build a drybox, to print directly out of this box. 

 

The filament makes not always a cracking sound like steam, it does when it is really wet, but you can get problems also before like a clogged nozzle and something like that. My previous print started ok after 5cm PVA stopped extruding for 3-4mm and then started again extruding and printing fine. Was also some kind of clogging but unclogged itself after some time.

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1 minute ago, aag said:

I am sure it is because of the bundled telepathic force of the community...

I hope you haven't started a longer print, because I go to sleep soon and then the telepathic force could be weaker 🙂 

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