kmanstudios 1,120
2 hours ago, tomnagel said:Glad you solved the clog. But still interesting to know the root cause.
The BB core should not clog, also not after many days of printing. However, a minimum flow is needed. How much PVA was in the layers before it failed? If it has to heat up the nozzle tp print a tiny bit of PVA every layer, it could burn and clog. This is however very rare.
Another option (makes more sense) is that there was another reason that there was no flow, for instance entanglement of the filament. Your clog was then the consequence of this.
Did you use Cura for slicing? Cura takes care that the not-used nozzle is lowered in temperature.
I have been doing some very delicate prints that have been doing this very thing and it does require cleaning. Our humidity levels here have been very low, around 35% with the arctic blast we got last week and before. And once it starts building up, it keeps cooking it in. I did not think of that....thanks for mentioning it!
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tomnagel
Glad you solved the clog. But still interesting to know the root cause. The BB core should not clog, also not after many days of printing. However, a minimum flow is needed. How much PVA was in
Dim3nsioneer
Better keep it below 35% r.h. and never let the clogged PVA carbonize so far you cannot melt filament anymore which you push from above at print core cleaning.
gr5
There's a print core cleaning wizard? I've been using my UM3 multiple times per week for over a year and I didn't notice? Was that there when it was still in beta? I thought I went through all the
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adshale_de 0
I can confirm that it didn't knot up, no. The filament was still loose, and hadn't become taught on the spool. I triple checked this, having had a similar issue where the PLA entangle on an earlier test print, and had stripped out on the feed motor to the AA motor. (This was due to a mistake on my part, rather than a systemic issue).
As for the moisture, its possible that air con could have affected it, but doesn't AC actually dry the environment, rather than make it more humid?
Humidity is looking like the most likely culprit, and coupled with the constant on-off nature of the model printed, these may have combined to cause the filament to block. Now I know what to look for, I will keep an eye out for any potential problems, and try to prevent them, before something like this happens again.
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