[Solved] problem DUEX 5 Bltouch RRF3

[Kaj]

Hi everyone,

I'm trying to get the bltouch working with the Duex 5 (installed triple Z) on RRF3 but I'm having problems.
(I had it working in the past without the Duex 5: https://forum.duet3d.com/topic/14485/rrf3-bltouch-setup?_=1582892234248)

On the Duex 5 I want to use heater 7 So I connected the red brown and yellow cables from the bltouch to PWM5 on the Duex.

The white and black wires are going to ZProbe "GND" and "Z Probe in" on the Duet 2 Wifi

When I turn on the power the Bltouch does a test (down up down) and turns red.
It's not going down when I do a Home Z and the Z goes up.
(I have to emergency stop)

The 5V jumper on the Duex 5 is on the 2 left pins.

I can't figure out what I'm doing wrong

Here's my Config.g

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Wed Feb 19 2020 10:30:38 GMT+0100 (Central European Standard Time)
 
; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"xypro"                                  ; set printer name
 
M667 S1                                        ; select CoreXY mode
 
; Network
M552 S1                                        ; enable network 
M552 P192.168.0.6                              ; IP set to 192.168.0.6
M554 P192.168.0.1                              ; Gateway
M663 p255.255.255.0                            ; Netmask
M586 P0 S1                                     ; enable HTTP
M586 P1 S0                                     ; disable FTP
M586 P2 S0                                     ; disable Telnet
 
; Drives
M569 P0 S0                                     ; physical drive 0 goes backwards
M569 P1 S0                                     ; physical drive 1 goes backwards
M569 P2 S1                                     ; physical drive 2 goes forwards
M569 P3 S1                                     ; physical drive 3 goes forwards
M584 X0 Y1 Z2:5:6 E3                           ; set drive mapping three Z motors connected to driver outputs 2, 5 and 6
M671 X-15:100:215 Y190:-10:190 S0.5            ; leadscrews at rear left, front middle and rear right
M350 X32 Y32 Z32 E32 I0                        ; configure microstepping with interpolation
M92 X160.00 Y160.00 Z800.00 E300               ; set steps per mm
M566 X900.00 Y900.00 Z12.00 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 X310 Y310 Z500 S0                         ; set axis maxima
 
; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2                                     ; set endstops controlled by probe
 
; Z-Probe
M307 H7 A-1 C-1 D-1                                      ; disable heater on PWM channel for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000 A10 R0.75 S0.02     ; set Z probe type to bltouch and the dive height + speeds
M950 S5 C"exp.heater7"                                  ; create servo pin 0 for BLTouch on exp.heater7
G31 P500 X-40 Y-0 Z5                                    ; set Z probe trigger value, offset and trigger height
M557 X50:350 Y15:300 S10                                ; define mesh grid
 
 
 
 
; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
M143 H0 S120                                   ; set temperature limit for heater 0 to 120C
M307 H0 B1 S1.00                               ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                        ; map heated bed to heater 0
M308 S1 P"e0temp" Y"thermistor" T100000 B4138  ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S280                                   ; set temperature limit for heater 1 to 280C
M307 H1 B0 S1.00                               ; disable bang-bang mode for heater  and set PWM limit
 
; Fans
M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                           ; create fan 1 on pin fan1 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
 

Deployprobe.g

; deployprobe.g
; called to deploy a physical Z probe
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Wed Feb 19 2020 09:30:43 GMT+0100 (Central European Standard Time)
;M280 P0 S10 ; deploy BLTouch
M280 P7 S10 ; duex deploy BLTouch
 

and retractprobe.g

; retractprobe.g
; called to retract a physical Z probe
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Wed Feb 19 2020 09:30:43 GMT+0100 (Central European Standard Time)
;M280 P0 S90 ; retract BLTouch
M280 P7 S90 ; retract BLTouch

[Phaedrux]

@Kaj said in problem DUEX 5 Bltouch RRF3:

M950 S5 C"exp.heater7"

I believe your deploy and retract commands must target your gpio pin you've defined in M950 and not the physical pin like it used to be in RRF2. So instead of P7, it would be... P5?

[Kaj]

@Phaedrux Okay I'll try it tomorrow! Thanks

[Danal]

I believe that P5 on the M280 will fix it...

At the same time, I am curious why you did not define the pin as S0? Just to keep things simple?

M950 S5 C"exp.heater7"
M950 S0 C"exp.heater7"

It is your "zero-th" servo, so it won't collide with anything.

[Kaj]

@Danal Because I don't fully understand what I'm doing yet. I assumed that the servo pin was linked to a physical pin on the board.

[Kaj]

@Phaedrux I tried P5 but same results, not coming down. Also tried to redefine S0 and the P0 in the retract and deploy but also no luck.

[Kaj]

I'm still setting it as exp.heater7, I'll try setting it as !duex.pwm5 since I'm using a duex now. I'll report my findings later.

[Kaj]

I managed to get it working.
For future reference:

Config.g

; Z-Probe
M307 H7 A-1 C-1 D-1                                     ; disable heater 7 on PWM channel for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000 A10 R0.75 S0.02     ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"duex.pwm5"                                    ; create servo pin 0 for BLTouch on exp.heater7 --> duex.pwm5

Deployprobe.g

M280 P0 S10 ; duex deploy BLTouch
 

Retractprobe.g

M280 P0 S90 ; retract BLTouch

[dc42]

@Kaj said in [Solved] problem DUEX 5 Bltouch RRF3:

I managed to get it working.
For future reference:

Config.g

; Z-Probe
M307 H7 A-1 C-1 D-1                                     ; disable heater 7 on PWM channel for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000 A10 R0.75 S0.02     ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"duex.pwm5"                                    ; create servo pin 0 for BLTouch on exp.heater7 --> duex.pwm5

Deployprobe.g

M280 P0 S10 ; duex deploy BLTouch
 

Retractprobe.g

M280 P0 S90 ; retract BLTouch

I'm glad you got it working. I believe your settings are essentially as described at https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Software_setup_RepRapFirmware_Num_3. Did you find that page unclear, or did you not find it?

[Kaj]

@dc42 Thanks! I did find the page and it did help me out.
I'm still learning how this all works. After some trial and error using multiple sources (including the page you linked) I ended up figuring it out.

An example for a duex board additionally to the wifi exp. example on that page would probably have helped clear things up with the duex.pwm pin naming for me.