Connecting a tool board to Distribution board CAN_OUT

A Former User

is there anything else connected to the distribution board?

you need to bypass any unused toolboard connections and remove the temination jumper to use the CAN_OUT. And ensure you connect CAN(1)_H to CAN_H.

What else is involved with this setup?

dc42

@DDD said in Connecting a tool board to Distribution board CAN_OUT:

Hello
I want to connect a 1LC tool board to the CAN_OUT of the Distribution board, but I cannot find the wiring and connecting them with the regular CAN bus cable doesn't work.
I tried with and without the Terminator pin with no success.
Thanks

Why do you want to connect it to CAN_OUT? Is it because you have another 4 Tool Boards connected to the distribution board? If so, the wiring would be the same as described at https://duet3d.dozuki.com/Wiki/Duet_3_Tool_Board#Section_Connecting_WITHOUT_Duet_3_Tool_Distribution_Board.

DDD

i have 4 1LC connected to the distribution board and need a fifth one. I'll double check my wiring because doesn't work even with the resistor in place

A Former User

@DDD picture might enable some peer review; but sounds like it should just work with no jumpers on the distribution board and the resistor on the connection to the last toolboard as shown in the link dc42 posted

dc42

Does the 5th tool board work if you use the same cable to connect it directly to the main board?

DDD

@dc42 I made a new RJ11 connector using the diagram from https://d17kynu4zpq5hy.cloudfront.net/igi/duet3d/IgXsNbOKcEAWjeNO.huge

Connect the board directly to the Mainboard to have a fast blinking red light.

Re-do the connector making sure that everything was as specified but the same result happened.

dc42

Have you definitely connected the wires to the two middle pins of the RJ11 connector? Have you tried swapping the two wires? Does another tool board work with the same cable?

DDD

@dc42 Yes, I swapped cables and tool boards with the same result. I swapped with the PIN 1 and 2 on the tool board with the same results.

Connecting 1LC´s using the distribution board works perfectly.

dc42

Have you used a multimeter to test your cable for continuity?

A Former User

@DDD said in Connecting a tool board to Distribution board CAN_OUT:

same result

with the risk of repeating myself; maybe you're overlooking something that someone here would spot if you added a picture.

DDD

Continuity was checked and there is no problem there. Double-checked the resistor and its a 120 ohm one.

A Former User

~~If you peel off the tape, insert the RJ11 plug into the RJ12 socket on the Duet do you have continuity from the Duet to the exposed leads after the plug?~~ go with dc42's approach, much more elegant as usual!

At a distance it looks like the crimp might have left the contacts at an angle

dc42

Here's another test: plug the RJ11 connector into the Duet, then with power off measure the resistance across your 120 ohm resistor. It should read 60 ohms, because the 120 ohm terminator on the Duet should be connected in parallel with it via the cables.

DDD

Seems like the RJ11 connector is the one to blame, continuity is present between 1LC and the connector but somehow the connector makes no contact with the CAN connector.

I'll get a adsl cable to salvage the connectors and hopefully solve this issue

A Former User

@DDD said in Connecting a tool board to Distribution board CAN_OUT:

Seems like the RJ11 connector is the one to blame

If you don't mind could you do a close up of it? and which tool was used? Might be good to add to the knowledgebank of the hivemind to try to understand why it turned out the way it did.

DDD

It's fixed. Got another set of RJ11 connectors from a different vendor and everything worked out. Maybe those were defective. Old RJ11 connectors run out after a few tests, so comparing them against new ones is not possible.

I was using a generic RJ11 crimping tool with a generic RJ11 source from a local electronics shop.

It is worth mentioning that one time I over crimped the connector. There was conductivity from the 1LC to RJ11 but not from 1LC connected to the CAN connector on the mainboard.