On my Duet 2 Wifi, RRF 3.1.1, after I cancel a running print job, my bltouch no longer functions. That is, all servo control commands to the BLTouch no longer cause the pin to retract or deploy.
After resetting the board, everything functions as normal, but another cancelled print job will cause the same behavior.
Any help solving this appreciated!
Both ground wires are connected as described by the z-probe setup guide
But your comment on stepper noise had me thinking:
"If it's stepper noise, why does it only occur after cancelling a print, and not when I'm swinging the effector around beforehand"
Which led me to the root cause of my issue, my extruder stepper. Specifically (I guess), the hold current.
I tested this with manual control. BlTouch pin down, up. Works great.
Extrude 1mm, command BLTouch, no result.
Issue a M18 E0, bltouch immediately follows the last command sent.
So looks like my extruder stepper is the noisy one. This makes sense, following wire routing.
For now I guess I'll just issue a M18 within my cancel.g.
Unsure what would have caused this to only act up starting with RRF 3.1.1 - perhaps the configurator has a higher default extruder current than it did the last time I ran it?