Adding the Duet 3 3HC for additional Extruders

[dc42]

Is the constant blinking rapid, or is it slow and in sync with the blinking LED on the main board?

If it is rapid blinking, then it sounds to me that you don't have the correct CAN bus wiring. What cable are you using between the MB6HC main board and the EXP3HC expansion board?

[mrenz999]

@dc42 Rapid blinking. I am using the CAN cable that came with the 3HC when I purchased it from filastruder.

[mrenz999]

@dc42 I have a DSL cable. Plugged that in and getting the same result. Did I get a bad board ? Is there something else I can try ?

[dc42]

As you have tried a different cable, I suspect that either the main board or the expansion board has a faulty CAN port. Please contact your supplier and discuss with them whether they wish to try replacing just one of them or would rather you return both of them.

[JuJuDelta]

Forgive me for stating the obvious, or if you have checked already:

DSL cables come in 2 flavours, 1:1 wiring and cross over.
The first few I grabbed out of my junk box were cross over, didn't work.
Wasted an hour debugging.

1:1 is needed for Duet 3

[dc42]

Good point! Use a multimeter to check that the two middle pins of the RJ11 connectors are wired straight through.

[mrenz999]

@dc42 It is correctly wired. Tested both the DSL and the Cable I purchased with the 3HC from filastruder. So the cables aren't the issue.

[dc42]

Thanks! Please contact Filastruder and see how they want to establish which board has the faulty CAN port. Assuming neither board shows signs of damage, my guess is that it's the MB6HC, because almost all the tests we do on the EXP3HC rely on the CAN port working.

[mrenz999]

@dc42 Will do. Neither have any visible signs of damage.

[mrenz999]

@dc42 Emailed filastruder. Filled out the warranty form. Looks like I need to mail it back and then a few days after they receive the board a replacement will be sent out.