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bigtreetech / SKRat

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Can Bus terminal resistor jumper - J49 #2

Open devil-77 opened 1 year ago

devil-77 commented 1 year ago

Is it necessary to set jumper on J49 in order to use CanBus? These are the two pins between the CanBus connector and Four-Wire FAN0 connector. In the manual i can't find any info about the terminal resistor for CanBus.

Tina-Builds commented 4 months ago

If you want to use canbus you have to set terminal resistor on the 1st and last can device on the bus. Eg. If you only use the SKRat and a can toolhead board like a EBB36, You have to set the terminal resistor on both. The general rule is 120R on 1st can device -> no 120R on next can device -> ... -> 120R on last can device. Eg. I have a Manta E3EZ, a MBB board and 2 EBB36 in a IDEX printer. I set it up this way: MBB with 120R jumper placed -> E3EZ no 120R -> EBB36 no 120R -> EBB36 with 120R jumper placed.