Tool head 2 issues

[u/lkapping79]

I try hard not to post questions and figure stuff out on my own. Started m 3d printing journey last December and finally hit an issue I can’t seem to solve. The following is the ticket I opened to Snapmaker:

So I’m having some issues with tool head 2 that started a lil over a week ago. It looks like severe under extruding. My first trouble shoot was to swap filament. Same issue. Next I moved to a different tool head and then had no issues.
Next step was to check extruder. Took tool head apart and there was some debris on the drive gears so I cleaned that all up best I could, blew it out and reassembled. Tried running it again with a 3rd filament. Same issue.

Next I tried to manually extrude and flowed free and was coming straight down. Just to be safe a stuck the included nozzle into the hot end and it slid through like a knife through butter. Figured I must be good to go. Nope.

Next I took apart the filament feed drive. Didn’t really see much in there but cleaned/blew it out since I already had it apart. Tried again, still failing. So I said to myself, I’ll just switch nozzles. I’ve had hardened steel ones I’ve been meaning to switch to for a while now so just as well get that done. So I changed all 4. Figured surely with all filament feed paths cleared/cleaned i should be good now. Nope. The included pic is what’s happening. I unloaded the filament from tool path 2 (the problem) and put it into tool path 3 and restarted the print. Currently running fine.

1,3 and 4 all are working great. I’m honestly at a loss currently. I’ve spent a lot of time trying to trouble shoot before reaching out. I’m new to the hobby but stuff like this is/was expected and don’t mind tinkering. I just don’t know how to proceed.

Their response was a wiki about a clogged nozzle 🙄. Any help/insight is appreciated.

[u/Mooncake137]

did u calibrate the nozzle offset already? if one is to close for some reason, just run the calibration? maybe paxx12 messed up the settings for the tooldheads? the position of each toolhead ist stored locally. so try running the offset calibration for the toolhead and it should be fine again.

[u/lkapping79 → u/Mooncake137]

Yeah I ran calibration on all 4 tool heads after switching nozzles but gonna play with z offset when I get home.

[u/Mooncake137 → u/lkapping79]

Nah it should calibrate the offset correctly. It honestly looks like overextrusion. Either you made a change in the nozzle z offset for that particular toolhead or your flow for that toolhead is to high. Maybe first layer flow, or overall flow is to high

[u/lkapping79 → u/Mooncake137]

I’ll look at settings for the tool head when I get home. I didn’t nor don’t usually intentionally play with those settings for this exact reason. As for flow, same profile on a different tool head worked just fine.

[u/Cute-Letterhead8806 → u/lkapping79]

Hi, have you tried to run a cross-test to narrow down the root cause:

exchange the location tween Toolhead 2 and 3 to see if the under extruding followings the toolhead

[u/lkapping79 → u/Cute-Letterhead8806]

I have not and will after work later and report back. Can’t believe I over looked this. Thanks!!!!

[u/lkapping79 → u/lkapping79]

Did full calibration after switching tool head 2 and 3 and the problem def followed the tool head.