Tool board to Duet 3 wiring



  • Hi,

    I am trying to wire up my tool board to my Duet 3. Per the documentation of the DUET 3 and tool board I have connected the following Pins via twisted pair cat5
    Tool CAN pin 1 w/orange - Duet Can Pin 4
    Tool CAN pin 2 orange - Duet Can Pin 1
    Tool CAN pin 3 w/blue - Duet Can Pin 3
    Tool CAN pin 4 blue - Duet Can Pin 2

    No luck connecting however with M115 B121 or b10 . I get the following messages:
    4/29/2020, 8:56:27 PM Connection to Duet established
    4/29/2020, 8:56:26 PM Warning: Lost connection to Duet (Timeout while waiting for transfer ready pin)

    Previously I also tried a straight through connection pin 1 to pin 1, pin 2 to pin 2 etc...

    Does someone know what I am missing here?



  • Duet 6HC connector, RJ11:

    1e6b9a0b-4d60-43ce-9f86-2d800953b484-image.png

    Toolboard connector, JST ZH:

    15b38257-97f1-42b5-a321-71ebd8e980cb-image.png

    With CAN, H connects to H, and L to L. The 6HC uses CAN1, the center pins, as primary. (CAN0 may have future uses). Therefore, the cable that connects a 6HC and a Toolboard must connect:

    • 6HC pin 3 to Toolboard Pin 4
    • 6HC Pin 4 to Toolboard Pin 3

    If you add tool boards, to chain them:

    • toolboard0 pin 2 to toolboard1 pin 4
    • toolboard0 pin 1 to toolboard1 pin 3

    And finally (ha ha), to terminate the CAN bus:

    • The 'last' toolboard in the chain must have a 120Ohm resistor across pins 1 and 2. It will probably seem to run without this, but not having it can cause very obscure problems down the road.

    All above is what a 'tool distribution board' does, with jumpers to let you select which connectors are bypassed and who terminates (or not).



  • P.S. Those schematics are on Github.



  • @jdumoulin said in Tool board to Duet 3 wiring:

    Tool CAN pin 1 w/orange - Duet Can Pin 4
    Tool CAN pin 2 orange - Duet Can Pin 1
    Tool CAN pin 3 w/blue - Duet Can Pin 3
    Tool CAN pin 4 blue - Duet Can Pin 2

    try

    Tool CAN pin 4 blue - Duet Can Pin 4 3
    Tool CAN pin 3 w/blue - Duet Can Pin 3 4

    and a 120R termination resistor accross tool CAN pin 1 and 2.

    edit: whops, I guess thats why i normally link to the answer instead of reproducing it..
    https://forum.duet3d.com/post/133825



  • @bearer said in Tool board to Duet 3 wiring:

    try

    Tool CAN pin 4 blue - Duet Can Pin 4
    Tool CAN pin 3 w/blue - Duet Can Pin 3

    Copy of above with H and L added:
    Tool CAN pin 4 (CAN_H) blue - Duet Can Pin 4 (CAN_L)
    Tool CAN pin 3 (CAN_L) w/blue - Duet Can Pin 3 (CAN_H)

    @bearer that seems to reverse H/L. Did I miss something?



  • Hey guys,

    Thank you for your help. I really did search all over the forum but didn't realize to check GitHub.

    Thanks again. I will give this a try next week when I am near my printer again.



  • @jdumoulin said in Tool board to Duet 3 wiring:

    Hey guys,

    Thank you for your help. I really did search all over the forum but didn't realize to check GitHub.

    Thanks again. I will give this a try next week when I am near my printer again.

    I followed danal’s directions, as I asked your question a week or so ago too - works perfectly. The key was the terminating resistor.



  • @Nuramori said in Tool board to Duet 3 wiring:

    I followed danal’s directions, as I asked your question a week or so ago too - works perfectly. The key was the terminating resistor.

    Thank you. It is working now


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