A nozzle of my printhead got clogged during my second print - is there anywhere a repair manual / instructions how to fix that issue on a dual print head ?
Thanks in advance
heat it up 20 to 30 degrees Celcius higher than you were printing. Try to unload the filament from there. If it doesn’t work, I’ve been taking a pair of clippers, and snipping the filament just above the entrance to the removable hot end piece. In the cases where the filament does not unload properly I have had to take that hot end piece out, disassemble it, and torch the heat zone/nozzle area in order the melt the filament out. Is this an officially supported method? No. Could it damage your part if you aren’t careful? Yes.
Unfortunately clogging in the dual extruder head has been extremely prevalent for me, and it appears others have had the same issue. So far, I’ve gathered that playing with; retraction distance, nozzle switch retraction distance, and standby temperature, are the settings that will help somewhat minimize the issue.
On longer prints, I’m still getting the issue, and have no way of completely solving it. It always results in the same issue. If I catch it when it happens, it has an expanded, hardened end that is stuck in the end of the heat zone. If I don’t catch it, it will continuously grind the filament between the gears. If this is your issue, stay tuned to the forums and look out for official word from SM, hopefully we’ll get a fix soon…
Hi Spark - thanks for the hint but unfortunately it did not work. With disassembling I am little bit hesitant - i might lose warranty. Are there any instructions anywhere available?
I never had clogging on my a250 but Artisan seems to be special here …
Actually I am frustrated … having an expansive printer with a non working print head …
Unfortunately I have not run into any official instructions on resolving this issue yet. I have had my fair share of frustrations when dealing with this new print head as well. The first time was the worst. Snapmaker has not responded yet to these issues as far as I know, but I feel like they’ll be responding sooner or later. Until then the only advice I can offer is to remove that hotend. After removing the heating element, temp sensor, and silicone shroud on that heating block, you should be able to melt the filament out with a lighter or torch. That’s all I got unfortunately 
I think it only requires one or two tiny screws to get to that point, but I understand your hesitance to dissemble it… I was extremely worried I was going to mess something up when I did that.
Sorry to hear you’re having issues with the Artisan, it does look like a very sleek machine from the advertising. Best of luck resolving the clog. To keep this from happening in the future, I would experiment with lowering retraction values during a nozzle switch. It seemed to help me a bit. My clog could have been caused by something else though.
so I can’t simply unscrew the nozzle? (sounds like a facepalm)
Well… I never went about it that way, but yeah you could try that! Just remove that little silicone shroud on there and remove the nozzle! I know there is official documentation on that! Here’s a post with a video link!
ok - that worked for me … was rather simple … nozzle is free now but the area above the nozzle is still clogged … I give it a try without the nozzle and use the needle
Dang. My apologies if I gave a solution that wasn’t the simplest. I was just using my own experience on how I was able to solve the issue. Glad you got the nozzle unclogged! Best of luck getting it out of the area above the nozzle!
Spark - thanks anyway - I learned a lot today 
actually the needle comes out on the other side of the hot end but its to small to move the clogged material - might need a thicker needle which pushes the pla through the
Sweet! Glad to know there is another way of going about this that could be a bit simpler than what I did!
final solution: bought a drill with1,8 mm and removed the clogged material in the upper section with the drill.
Wow… that’s a big-gun solution.
Any advise so this doesn’t happen to you again or to anyone else?