I got a new Biqu H2V2 for my Ender 3 pro , since myold hotend started getting unreliable and that was a great excuse for yet another upgrade.
I wasn't happy with the carriage holder I printed, so I wanted to print a new one. After afew hours of printing, I needed to abandon one part, since it was incredibly messy with blobs of PLA gooped on the print. Since I needed the new carriage mount, I didn't think anything off it and simply abandoned that part and continued the other ones.
Today, I saw that the heating block is completely gooped up with PLA (see pictures). So now, I got two questions:
- How should I remove that gunk? I was thinking o| carefully peeling of everything without the silicone sleeve while the hotend is at a low PLA-bending temp, like 150°C, or 175°C.
- What caused this? Flowrate too high (the prints look the part)? Too fast extrusion? Heatcreep?
Thanks in advance. (:
@Prunebutt
If it is only external, heat to 230-240 C and use a brass brush to clean it off.
If it has also clogged inside, heat to 230-240 C and run PETG through to push it out. PETG has a higher melting point than PLA.
If even that doesn't work, hubby said something about doing a hard pull, but not sure exactly how he does that, so I'll leave it up to others to explain.
Hard pull or Atomic pull means to allow the pla inside the hotend to either cool to or heat up to ~80-100°C and then pull it out through the top. The semi melted plastic grabs clogs on its way out. Very easy and effective remedial action for small internal clogs.
Honestly, I do it every time I switch filaments.
It doesn't cost much time and you get a nice clean nozzle for a perfect print.
Same, actually.