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?
Thanks in advance. (:
Fenderfreek@lemmy.world 1 day ago
You have an incorrectly torqued connection between the heatbreak tube, nozzle, and heater block that is allowing filament to work its way past the threads and out the top/bottom. You’ll likely need to clean off what you can while hot in order to get it to a place where it can be disassembled and fully cleaned.
You may need to heat or even torch some of those parts clean, since there’s no generally available solvent for PLA to soak it off.
To prevent this, make sure you’re properly torquing those parts together according to the manufacturer’s instructions. Final torque is normally applied with the hotend empty and at temp.
Prunebutt@slrpnk.net 1 day ago
Harumpf 🙄😤. It came like that. I only attached the extruder to the printer. I didn’t expect that I need to open it up.
Maybe I should have fastened the nozzle, though.
gafu@techhub.social 1 day ago
@Prunebutt @Fenderfreek
Its not about torque only.
If build up correct, the nozzle flange does not touch the aluminium heater block. There must be a gap, can be a tiny gap.
You dont want to screw the nozzle against the block, but you want to screw the nozzle backside face (around the filament bore) against the heatbreak end face. This is the place where you close the oozing hole, the threads are not tight against liquid plastic.
unexposedhazard@discuss.tchncs.de 1 day ago
Yeah something is mega fucked. Never seen it like this.