RE: Constant PLA oozing at any temperature
Are you using gluestiks for adhesion?
RE: Constant PLA oozing at any temperature
That last print has Z-offset much too low. If the nozzle is touching the bed there can't be extrusion, and that's what is happening there.
RE: Constant PLA oozing at any temperature
Did you ever fix this issue? I'm having basically the same issue, that the printer will ooze out a LOT, and I suspect is the cause of my horrendous stringing:
RE: Constant PLA oozing at any temperature
i didn't read where anyone had suggested to check the hot end cooling fan. if it's off or half speed your printer will ooze like there's no tomorrow. if the fan set @ 100% is it running @ 100%? On thermistors in this application generally are of the ptc verity, temp goes up resistance goes up. A loose wire would indicate as a higher temp so hot end would be not so hot... cold even....
the symptoms fit with the hot end not being sufficiently cooled.
RE: Constant PLA oozing at any temperature
i didn't read where anyone had suggested to check the hot end cooling fan. if it's off or half speed your printer will ooze like there's no tomorrow. if the fan set @ 100% is it running @ 100%? On thermistors in this application generally are of the ptc verity, temp goes up resistance goes up. A loose wire would indicate as a higher temp so hot end would be not so hot... cold even....
the symptoms fit with the hot end not being sufficiently cooled.
OMG -- Robert you are a lifesaver!
I have been struggling with this with two different printers (unfortunately they're not Prusas) for more than a week now and the situation for me was the same - they were printers that have been sitting idle for months. In both cases, for me, the hot end fans were literally "stuck" and not running at all and I never noticed. When I took the covers off of the printheads and checked, I just needed to use a little canned air and spray them to get the dust and grime out. This also gave them a good spin as well which seemed to wake them up.
Now my prints are back to perfect and I thank you for the suggestion on this thread, it fixed things for me!
Dennis
RE: Constant PLA oozing at any temperature
In my case, with exception of PETG, I only get that kind of oozing with wet filament. I live in the Seattle area, and the RH in my house was 57% (at 62F) this morning. If I leave flammant, even PLA in the open for more that a couple days I get oozing and other annoying phenomena.
As others will say, this problem in not universal for everyone. It really depends on your local weather conditions.