BL Touch not triggering on Duex2

gbiski

Hello,

I connected a BL Touch to duet ethernet and duex2.
When i start the Duet the bltouch lights up and it triggers the pin down and up and then it stays correctly with the light on.
But when I tried to home to or sent a comment to push the pin down nothing happens..

My connections are as follows :

My config is:

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X280 Y300 Z290 S0 ; set axis maxima

; Endstops
M574 X1 Y1 S1 ; set active high endstops remove z1 for probe

; Z-Probe
M574 Z1 S1
M558 P9 F100 H5 R0.2 T6000 A5 B1 ; Set Z probe type/mode 9. H=Dive Height. F=Speed the bed moves
G31 P25 X35.0 Y0 Z0.001 ; Set Z probe trigger value,offset heigh + =lower to bed (prvs Z0.350)
M557 X35:280 Y20:280 S80 ; Define mesh grid

; BLTouch - Heater 3
M307 H3 A-1 C-1 D-1 ; Disable heater 3 to free up PWM channel 1 on the Duex board.

; Heaters
M140 H-1 ; disable heated bed
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C

My Home Z is

;
M280 P1 S160 ; Alarm Release and Push-Pin UP
G91 ; relative positioning
G90 ; back to absolute mode
G1 X140 Y150 F2000 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height

I also tried with the command without any success:
M280 P3 S160

I cannot figure where is my mistake.
Any ideas and help please ?

Danal

Please post your deployprobe.g and retractprobe.g

Also, try these commands to see if the BLt responds:

M280 P3 S160 I1
M280 P3 S10 I1
M280 P3 S90 I1

Phaedrux

I1 not needed for duex connections.

M280 P1 S160 is incorrect. It should be M280 P3 S160. The P# refers to the pin you've freed to use and M307 H3 A-1 C-1 D-1 has freed heater 3.

What do you have in the deploy and retract macros?

Double check the continuity of the wires and the crimps. This is the most common problem.

gbiski

@Phaedrux said in BL Touch not triggering on Duex2:

M280 P3 S160

I corrected the M280 P3 S160. I rechecked the cabling and this was an issue. Now when i run the macros Pin down and pin up it runs correctly.
But when I run the home z procedure or the G30 command I receive the error Z probe already triggered at start of probing move.
This is something to do with my config ?

aidar

Sound like you need to invert probe in pin, that is add I1 to you M558 command.

gbiski

@aidar said in BL Touch not triggering on Duex2:

I1

I did this the bed is started to move up but the pin of bltouch is not going down... So I stop the procedure.
If I test pin down pin up wit a macro the BLTouch responds correctly.
If I sent G30 again the bed is moving up but the bltouch has the light on and it does not move the pin down.

I have as home Z

; homez.g
; called to home the Z axis
;
M280 P3 S160 ; Alarm Release and Push-Pin UP
G91 ; relative positioning
G90 ; back to absolute mode
G1 X140 Y150 F2000 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height

and on config now:

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X280 Y300 Z290 S0 ; set axis maxima

; Endstops
M574 X1 Y1 S1 ; set active high endstops remove z1 for probe

; Z-Probe
M574 Z1 S1
M558 P9 F100 H5 R0.2 T6000 A5 B1 I1 ; Set Z probe type/mode 9. H=Dive Height. F=Speed the bed moves
G31 P25 X35.0 Y0 Z0.001 ; Set Z probe trigger value,offset heigh + =lower to bed (prvs Z0.350)
M557 X35:280 Y20:280 S80 ; Define mesh grid

; BLTouch - Heater 3
M307 H3 A-1 C-1 D-1 ; Disable heater 3 to free up PWM channel 1 on the Duex board.

Phaedrux

@gbiski said in BL Touch not triggering on Duex2:

But when I run the home z procedure or the G30 command I receive the error Z probe already triggered at start of probing move.

Check the white wire.