@pickett
Well, not really, but after tuning steps/mm on all motors the issue suddenly disapeared. Also i checked and rang all wires

@pickett
Well, not really, but after tuning steps/mm on all motors the issue suddenly disapeared. Also i checked and rang all wires

@dc42
Sorry for long response, tried to move BLTouch cable from motor as far as I could, double checked and tested the GND wire, but it did nothing to me

@dc42 Yes, all cables from the printing head as well as the cable from a stepper motor are in the same harness

@dkkovalev
But after removing the ^ from M558 the probe started to deploy and retract much less often

@dc42
No, removing the ^ from M558 didn't help

Just noticied that fan0 control also triggers BLTouch probe deployment and retraction

@peter247
G28
Error: Probe already triggered at start of probing move

For example

@phaedrux
I noticied that it starts doing that with every console error

My board is Duet 3

Hello, after updating my firmware to 3.3, my BLTouch started to act very strangely. The probe repeatedly deploys and retracts. How do I fix this?

Video

My gcode:

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Sun Jul 11 2021 22:49:11 GMT+0300

; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Duet 3"                                     ; set printer name
M669 K1                                            ; select CoreXY mode

; Drives
M569 P0.0 S1                                       ; physical drive 0.0 goes forwards
M569 P0.1 S1                                       ; physical drive 0.1 goes forwards
M569 P0.2 S0                                       ; physical drive 0.2 goes backwards
M569 P0.5 S1                                       ; physical drive 0.5 goes forwards
M584 X0.0 Y0.1 Z0.2 E0.5                           ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E420.00                  ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00                ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00            ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00                ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30                       ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X550 Y350 Z400 S0                             ; set axis maxima

; Endstops
M574 X1 S1 P"io2.in"                               ; configure active-high endstop for low end on X via pin io2.in
M574 Y1 S1 P"io5.in"                               ; configure active-high endstop for low end on Y via pin io5.in
M574 Z1 S2                                         ; configure Z-probe endstop for low end on Z

; 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
M558 H30                                           ;*** Remove this line after delta calibration has been done and new delta parameters have been saved
G31 P500 X0 Y0 Z2.5                                ; set Z probe trigger value, offset and trigger height
M557 X15:550 Y15:350 S50                           ; define mesh grid

; Heaters
M308 S0 P"temp1" Y"thermistor" T100000 B4138       ; configure sensor 0 as thermistor on pin temp1
M950 H0 C"out0" T0                                 ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                                   ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
M308 S1 P"temp0" Y"thermistor" T100000 B4138       ; configure sensor 1 as thermistor on pin temp0
M950 H1 C"out1" T1                                 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 R3.618 C135.2:115.2 D6.65 S1.00         ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                       ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"out8" Q500                               ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out7" Q500                               ; create fan 1 on pin out8 and set its frequency
M106 P1 S1 H1 T45                                  ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0                                   ; define tool 0
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss