Heatbed Port Overcurrent #31309 (CORE One) #26309 (MK4S) #1…

What happened?

Your printer is showing the message: "Overcurrent detected on xBuddy/Buddy heatbed port, disconnect the device."

Error name: Heatbed Port Overcurrent

Error code: #31309 (CORE One) #26309 (MK4S) #13309 (MK4) #27309 (MK3.9S) #21309 (MK3.9) #28309 (MK3.5S) #23309 (MK3.5) #12309 (MINI)

The error is shown when there is a damaged cable on the heatbed or any of its connections.

How to fix it?

Before manipulating any cables or electronic components, ensure the printer is fully cooled down to room temperature and switched off.
Avoid touching the surface of the xBuddy/Buddy mainboard, touch it only from its edges.

The most likely cause of this issue is damage to the heatbed cable. Check the path between the heatbed and the xBuddy/Buddy board, and see if there are any parts that are broken or pinched.

In case there is no damage, check the cable connection to the heatbed and to the xBuddy/Buddy board. Try reconnecting the connectors.

In rare cases, this error message can be shown in case of damage to the mainboard. So if the cables and connectors are intact, try checking the board for any damage.


CORE One heatbed	MK4/S, MK3.9/S, MK3.5/S heatbed

xBuddy board (CORE One, MK4/S, MK3.9/S, MK3.5/S)


MINI/+ heatbed (bottom)	MINI/+ heatbed (top)

MINI/+ Buddy board	MINI/+ Buddy board

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16 comments

Blockhead

•

Ich hatte vor einen druck mit 230 grad Düsentemparatur zu drucken. Nach ein paar schichten hab ich eine Redscreen mit der QR-Code Fehlermeldung 31309 bekommen. Ich habe alle kabel überprüft und die Platine hat keine offensichtlichen schäden. Ich habe gedacht wenn ich den treiber neu lade dann funktioniert es wieder aber leider schmiert er mir jetzt jedes mal nachdem er alle achsen refferenziert hat ab und nach dem er wieder neu hochfährt bekomme ich die Fehlermeldung.

austinsmithyrex

•

I have the same problem, wires are all good, connections tight and board is in good shape (only been in service about 6 months) I don’t see any damage to bed or anything. Any ideas?

thebbb

•

I have an MK3.5, the heatbed is 5 years old and the black paint on the bed is damaged here and there. That caused a short, through a structured sheet. Without the sheet, there was no short. I fixed the problem by applying heat resistant paint to the damaged areas (barbecue paint).

tetralite

•

Pre-heating is the work around for this.
When starting with the MK4 cold, selecting a file to print, and then starting the print, all the steppers and the bed heater and the hot end are turned on all at once, causing a current surge large enough to trigger the over-current sensor. So pre-heating reduces that surge when the other things are powered up at the start of a print, and printing can then be initiated. I would suggest that the firmware needs to be revised to apply power to the steppers, bed heater and hot end sequentially.

chrihag

•

unfortunately that doesn't work for me. Turning printer on and then using the preheat option (PETG) immediately triggers that error

Jbaumjr

•

I've had this twice now in the past week. It seems to be triggered by changing the filament and then immediately printing from the LCD. I found that if I pre-heat the printer to the proper settings for the new filament, then the alert doesn't trigger. Hope this helps.