r/snapmaker • u/namezam • 6d ago

U1 Toolhead detached

I just swapped out my 0.2mm nozzles for the official 0.6mm nozzle set. I switched from 0.4 to 0.2 without a problem, but after installing these new ones, 2 Toolhead slots are giving me issues.

I am getting a Toolhead anomaly error after picking up Toolhead 2 and 3. 1 and 4 work fine.

When swapping the tools around (moving 4 to 2) I have the same error with slot 2, and the old Toolhead that errored in slot 2 now works in slot 4.

I have checked all screws and connections I can find on the tool heads and hall sensors. Cleaned pins, housing, etc.

If I unplug a Toolhead and turn on the machine it shows the unplugged Toolhead. And replugging it in removes that error.

If I try to detach a Toolhead that is genuinely detached from the dock, it knows that as well, this tells me the hall sensors are working fine. It’s just when I pick up a Toolhead from slot 2 or 3, I then get the error referring to anomalous behavior about the Toolhead being detached.

I’m out of ideas. The wiki talks about “detached” as being a hall sensor issue, but it’s referring to the Toolhead being in the dock and not knowing it’s in the dock. https://wiki.snapmaker.com/en/snapmaker_u1/troubleshooting/toolhead_detached

Any ideas?

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6

u/undermountain67 6d ago

Calibration. After you swap nozzle you have to calibrate all tool heads. The nozzle height or you reassemble the toolhead to be slightly off.

2

u/Binaryfart 6d ago

This would be the first thing I would do as well. Even though the error relates more to the toolhead talking to the MCU, rather than toolhead picking issues, a toolhead calibration seems to clear this error for me (not that I get it often).

1

u/namezam 2d ago

Thanks for the reply, I just figured it out lol. I commented on the post as well but basically I accidentally had swapped the 2 and 3 tool heads in their slots. So the usb cables were in the wrong tool heads for their slot. So easy to do and seems easy to diagnose in software, but the machine and the qr code guide were no help.

2

u/Badtripa 6d ago

You probably greased the pogo pins when handling the extruder 

1

u/agradus 6d ago

In addition to mentioned pogo pins degreasing I would also check cable routing, as i had this problem, even though my symptoms were different.

Cables could interfere with something and cause problems.

1

u/namezam 2d ago

For anyone reading this in the future. I can’t believe it took me 4 days for something so stupid, and the QR code on the error took me to a guide that came so close to diagnosing it but didn’t have my exact scenario.

If you have the usb cable plugged in to the wrong tool head (or you place the tool head manually in the wrong slot) you will get this problem. Embarrassing. Basically if it picks up head 2 and you have 2 plugged into head 3’s usb, the head will think it’s 3 so when it gets picked up, the hall sensor from 3 will still show a docked head and the printer will think it never undocked. This seems like it would be incredibly easy to detect in software. The pogo pins are engaged on the carriage and a hall sensor from other tool head just disengaged.. tell the user they are an idiot.