Duet3 Expansion Board 3HC - No CAN-Connection

CR3D

now i have the same phenomenon with the x axis. This axis is also controlled from the 3HC.
Here it is a bit different ... the end stop reacts to the first hint, then reduces the speed and then it no longer reacts to the second trigger ...
The other axes, which are controlled by the main board, work perfectly ...

I really have no idea what is the problem here ...

deckingman

@CR3D Bit of a long shot here but try this. After the first G1 H1 (first pass), the axes will (should) be flagged as homed. So after that, you don't need to use the H2 parameter to move away from the end stop. Try taking out that H2 in those G1 Y-5 and X-5 moves( but you ned to leave it in for the Z moves).

CR3D

@deckingman

I will test this too!

@dc42 any ideas now?

CR3D

I think we can narrow down the error further ... it definitely has something to do with the 3HC ....

I have now put X0 and Y on the mainboard and the homing of X0 and Y worked!

JoergS5

@CR3D what is strange that the Y had different rotation directions: S0 and S1 when on 1.1 and 1.2. In your original config (Jun 23rd) it was same direction. In your new mapping it's S1 both again. Do you have different stepper wirings? (or direction is wrong and your Z isn't working now, S0-S0-S1)

CR3D

@JoergS5

No ... you are right...

but that's right ... I need different directions ... before that it was set wrong ... and here I also had a mistake ... but the directions have nothing to do with it ... I only had a few things were adjusted and at the beginning I had not installed any straps ...

the error only ever occurs when I control the axes from the 3HC, ...

dc42

I've made a note to try to reproduce this next week. It looks like a firmware bug to me.

deckingman

@dc42 said in Duet3 Expansion Board 3HC - No CAN-Connection:

I've made a note to try to reproduce this next week. It looks like a firmware bug to me.

No problems here with my CoreXYUVAB and assorted motors/end stops/expansion boards. The only thing that jumps out at me is that the OP has end stops on the high end whereas mine are all at the low end. So if there is a bug, it might be related to using end stops at the high end?? Just a thought...................

dc42

I was thinking the the original issue might be related to using more than one Y motor.

deckingman

@dc42 said in Duet3 Expansion Board 3HC - No CAN-Connection:

I was thinking the the original issue might be related to using more than one Y motor.

I'm using 3off Y motors. But thinking about it, they get re-mapped to individual axes for homing so you could well be right.