@Phaedrux said in Type of wire, duet 3 to toolboard:
it's phone cable for the boards with an actual connector.
https://docs.duet3d.com/en/User_manual/Machine_configuration/CAN_connection
Yes you'd want to ground the metal work as decribed.
Magic that answered what I needed, hopefully the last part till it's reliable
Then to the upgrades 40x40 instead of 20x20