19 hours ago, gr5 said:If the PVA feeder is slipping you almost surely have a partial block. The PVA caramelizes (turns brown, harder, stickier) and can coat the inside of the 0.4mm passage inside the nozzle.
This is best fixed with a lot of cold pulls. See the Maintenance menu on your printer. It walks you through hot and cold pulls. You may need 10 to 30 cold pulls to get most of the gunk out. Really. 3 cold pulls won't be enough.
Also you can google about "cold pulls" as there are tons of great videos and it's interesting to see how people do it on other printers - actually quite informative.
Another option is to just "throw money at it" and buy another BB 0.4 core.
Another thing I like to do is after I heat the nozzle, I use a hypodermic needle (23 gauge which is 0.35mm diameter) to scrape the inside of the nozzle back and forth for a few minutes. Get all that brown gunk off.
there is no clogging in the BB core, when i go to materials and manually move the filament it flows perfectly, is there a way to slow down the feed rate , i guess i can slow down the travel speed?
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gr5 2,243
If the PVA feeder is slipping you almost surely have a partial block. The PVA caramelizes (turns brown, harder, stickier) and can coat the inside of the 0.4mm passage inside the nozzle.
This is best fixed with a lot of cold pulls. See the Maintenance menu on your printer. It walks you through hot and cold pulls. You may need 10 to 30 cold pulls to get most of the gunk out. Really. 3 cold pulls won't be enough.
Also you can google about "cold pulls" as there are tons of great videos and it's interesting to see how people do it on other printers - actually quite informative.
Another option is to just "throw money at it" and buy another BB 0.4 core.
Another thing I like to do is after I heat the nozzle, I use a hypodermic needle (23 gauge which is 0.35mm diameter) to scrape the inside of the nozzle back and forth for a few minutes. Get all that brown gunk off.
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