I'm having an issue with the bl-touch probe randomly deploying and then instantly retracting. Right now, I have to disconnect the probe before printing as it caused the probe to crash into the print before.
I believe it starts doing it when the extruder heater is running.
All of the cables in my printer are shielded (besides the first and last 2-3 cm), with the shields going to a ground point. Besides that the only notable thing I can think of is the cables are a bit on the longer side at about 5 m (the printer is my old cnc that I slapped an extruder on). The cable for the bl-touch is 5-wire 0.34 mm2.
I was originally using a cheap clone, but replaced it with a genuine one. The only difference I could tell is that the clone had a more "distinct" movement, and the genuine one feels a bit sluggish.
Also with the genuine I cannot run the bed mesh, as it will fail to deploy after a dozen or two points.
Everything is running on a Duet3 MB 6HC (no sbc) with the following commands:
Config:
; Z-Probe
M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X34 Y0 Z1.677 ; set Z probe trigger value, offset and trigger height
M557 X15:385 Y10:190 S20 ; define mesh grid
Deploy probe:
M280 P0 S10
Retract probe:
M280 P0 S90
I've been dealing with this for a while, and it's driving me crazy.