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Hi Everyone,

Hopefully someone can help with this one.

I recently got an Anet A8/Prusia i3 which, when delivered, was missing the cabling for the heatbed - so I figured on upgrading the cabling whilst I’m at making a new lead up.

The connections look like standard 3 & 6 pin JST Connectors - Can anyone who has the same printer show me where the wires lead off to for the heatbed? i.e where the B_T & BED leads go in the ++ – 6 pin connector?

Regards

James

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Hi James,

I included two photos to clarify how to hook up the heated bed to the Anet A8 motherboard. In short:

  • Connect motherboard left bed connector to + on heated bed with thick red wire
  • Connect motherboard right bed connector to - on heated bed with thick black wire
  • The two middle pins of the heated bed should be connected to pin 1 and 3 of the connector marked B_T on the motherboard. Polarity shouldn’t matter.

Good luck.

Regards,

Paul

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Paul,

Thank you so much for taking the time to reply & for the photo’s!

I’ll wire it up & test, I take it the extra + & - pins are for a bed upgrade such as the Mosfet upgrade & not used as standard?

Hopefully will be able to start using the printer now!

Kind Regards

James

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Hi James,

The connector in my photo is the unmodified, original version, but I’m going to replace it with a MOSFET module. This is highly recommended to prevent overheating the wires and/or other parts of the printer. The standard connector and wiring set is not designed to handle large amounts of current. It’s a design flaw from Anet that should have been fixed.
Learn more about this here: https://3dprint.wiki/reprap/electronics/heatbed_mosfet

If you’re not going to use a MOSFET module, I recommend that you connect the red wire to both + terminals on the heated bed and the black wire to both - terminals. This way the current is distributed more evenly.

Regards,

Paul

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Thanks again Paul.

I’ll consider the Mosfet upgrade once I run a few prints & get the hang of the printer.

Good tip on the wiring to the heatbed too - as I’m making a new cable up I’ll certainly use both terminals & some decent wire.

I appreciate your time

Regards

James

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Hey,

Just a random question, appears we have the same heatbed, was one of the four corners screw holes larger than the other 3? I appreciate your time.

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Nope,

The screw holes were the same size on mine.

Do your screws fit the bottom section where you screw on the butterfly nut underneath?

Regards

James