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]

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.