Extreme oozing and stringing after maintenance of hotend
Hi,
my Mk3 recently had a blockage in the heatbrake. Up to that point it was printing well. I took the hotend apart and carefully removed the blockage using a drillbit. After reassembly the hotend oozes like crazy. There is also a lot of stringing.
I already changed the nozzle and the ptfe tube, with no effect. I torqued up the nozzle while heated.
I am still quite new to FDM printers. What could be wrong with the hotend?
Greets
Malte
Re: Extreme oozing and stringing after maintenance of hotend
Hi,
Did you use pla before the blockage or abs?
Usually when it oozes like crazy it means that the pressure inside the heat break is high and have to wait until the pressure equalize inside while the hotend is hot.
If the extruder filament through the nozzle is "too thin" than it was supposed to be, there may be some minor blockage inside heat break or the nozzle. Usually by extruding more by hand slowly until not much of a resistance and extruded plastic through the nozzle looks how it was supposed to be.
I may be wrong in trying to troubleshoot your problem.
If I remember correctly, I too had similar problem and if I'm not mistaken the problem itself lies with the filament.
Re: Extreme oozing and stringing after maintenance of hotend
Turns out it was bad filament. I just used some different filament spools and they came out fine. All PLA.
Re: Extreme oozing and stringing after maintenance of hotend
I had a similar situation with a pla spool that worked fine for half of the spool. Then it went crazy. Fixed it by baking it. Creating my own filament dryer and back in business.
RE: Extreme oozing and stringing after maintenance of hotend
Now I have exactly the same problem .. how did you fix it?
RE:
Another Zombie revived...
@amal2442 really, you have exactly the same problem? Including the blockage and the same actions taken on an Mk3??
If at first you don't succeed, skydiving is not for you.
RE: Extreme oozing and stringing after maintenance of hotend
I have replaced the hot end with new one .. then the stringing problem and low quality print appeared
RE: Extreme oozing and stringing after maintenance of hotend
Another Zombie revived...
@amal2442 really, you have exactly the same problem? Including the blockage and the same actions taken on an Mk3??
To be fair, this user does seem to have exactly the same problem as the OP in the OTHER thread she resurrected.... 🤨 Actually reading that other thread might have provided a possible solution (thermistor in new hot end may be reading differently from the old one).
If it's the same problem then the same fix should work. @gaston-d3 seems to have found it.
Cheerio,