Is there a workaround, or is it a known issue, that the motors in the dual extruder hang up?
I’m trying to get it working on my D3d header, but there are so many problems that I can’t tell when a particular one is occurring. I already have changed doors and additional clamp pressure. However, I see that another problem is the temporary or continuous interruption of the engines. This can, of course, occur when you are trying to print, and then it works without any problems during the filament loading procedure. However, sometimes it happens during this procedure (the filament does not load or unload, and the motor does not work even when I open the filament clamp - so that’s why I’m sure it is hanging).
Is there firmware that doesn’t have such hangups?
Or maybe a place/guide where you can find steps on how to go through all the problems one by one to get this module to work?
Did not hear of that problem before, so my guess would be you have a faulty unit. Either just a cable is loose, or the driver overheats? Is it affecting both extruders?
Whatever, I’d recommend reaching out to Snapmaker support.
Apparently that’s the case. I just sat down for the DH tests again. Right at the beginning, the engine stopped supplying filament. Even setting the flow rate to 150% did not help. Then, interrupting the printing attempt, I went to the control panel and tried to load/unload the filament, but it was impossible to do so at all. What’s more, even resetting the machine didn’t help - only after waiting a few minutes with the machine turned off, the filament loading came to life on both extruders.
I’ve filmed it during hang:
What’s more - I left the extruders warm after when they came back to life. After a few minutes, both stopped working again - which would suggest some overheating. However, after another 10 minutes of leaving them in exactly the same condition and temperature, they came to life again…so it is not overheating… I simply have a faulty header.
I guess your connectors of the extruder steppers are loose.
Open a support ticket or check it yourself:
There is also the guide which contains the unmantel and disassembling of the dual
extruder tool head.
Thanks for your reply! Unfortunately, there is a gap in your reasoning. As you can see in the video, the problem occurs in both extruders at the same time (it hangs and hangs up at the same time). If it was a loose plug - this should happen one at a time, and only sometimes both).
Regardless, I decided it wouldn’t hurt to try, so I followed tutorial - I pulled out and put both plugs back in (even though they didn’t look loose). Unfortunately, the problem still persists.
I have already registered my ticket.
Let us know the solution anyway 
.
Once more to try, reset the machine settings by entering M502 to the console.- (record your tweaks before)
I guess the pcb of your dual extruder is faulty…
Same issue just occurred for me today.
R extruder drive will not rotate as commanded but will rotated if pushed.
Also creates a buzzing sound.
Will let everyone know what support says
Hello fellow makers! Has anyone experienced no rotation of either stepper motor for the extruders? Neither Left nor Right extruder advances the gears to load/unload the filament. Checked the cabling, and it’s tight and proper.
@Jade, anything we can do more than checking proper connection of the extruder-steppers?
Anyway guys, open a support ticket and get further attention.
https://snapmaker.formcrafts.com/support-ticket
Checked the connections all are fine.
So its a mechanical in the motor it self or board issue.
missed the other end of the wire!!! For me it wasnt the white connector it was where the wire attaches to the motor.
Must of gotten pinched when i took it apart with the new door and filament breakage sensor upgrade.
So check the very tiny wires and the connection to the motor. Remember for me this is the right hand extruder which is the one that moves up and down for the filament change. Might be a bad design for a motor that moves up and down as much as this one does.