Creality BLtouch

daniel.armstrong

Hello Everyone,

I have been working to install my Creality BLtouch on to my newly upgraded replicator 2x + Duet 2 Wifi. I have been following a couple of threads and blogs of people who have completed it as well as the official Duet documentation. So far it looks like its wired correctly and powers up, however i am struggling to get it to test deploy.

Would some one mind looking over my config.g for any errors or obvious noob mistakes?
Any and all help would be appreciated.

config.g
; Configuration file for Duet WiFi (firmware version 3.1.1)
; executed by the firmware on start-up
;
; Modified from V3 config.g on 4-06-2020

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin
M208 X0 Y0 Z0 S1 ; Set axis minima (bed offset 12 and 10 from zero)
M208 X270 Y140 Z150 S0 ; Set axis maxima (reduced by offset above)

; Enable Panel Due Connector
M575 P1 S1 B57600 ; Enables connector and sets baud rate

; Endstops- Switches
M574 X1 S1 P"!xstop" ; X min active high endstop switch
M574 Y1 S1 P"!ystop" ; Y min active high endstop switch
M574 Z1 S1 P"!zstop" ; Z min active high endstop switch - Config for hard Z Endstop

; Endstops- Z Probe
M574 X1 S1 P"!xstop" ; X min active high endstop switch
M574 Y1 S1 P"!ystop" ; Y min active high endstop switch
M574 Z1 S1 P"!zstop" ; Z min active high endstop switch - Config for Z Probe

;Touch Probe
M558 P9 C"^zprobe.in" H5 F100 T2000 ; BLTouch Probe
G31 P50 X43.07 Y4.68 Z1.5 ; Set Z probe trigger value, offset and trigger height - Increase Z value to move bed closer to nozzle

;M557 X5:204 Y3:242 S20 ; Define mesh grid

; Drives
M569 P0 S0 ; Drive 0 goes backwards
M569 P1 S0 ; Drive 1 goes backwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M569 P4 S1 ; Drive 4 goes forwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X88.573186 Y177.78 Z400 E409 ; Set steps per mm
M566 X900 Y900 Z300 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X1080000 Y1080000 Z600 E96000 ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z100 E2000 ; Set accelerations (mm/s^2)
M906 X900 Y1000 Z400 E1200 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3974 C0 R4700 ; 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
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 H0 R0.261 K0.401:0.000 D3.11 E1.35 S1.00 B0 ; Set PID values for Heatedbed - derived from autotune
M307 H1 R1.219 K0.254:0.000 D6.15 E1.35 S1.00 B0 V19.9 ; Set PID values for Extruder 1 - derived from autotune

; Disabled heater to free up PWM pin For BLTouch
M307 H3 A-1 C-1 D-1

; Network
M550 P"Duet_Rep2X" ; Set machine name
;M551 P"XXXXX" ; Set password
M552 S1 ; Enable network
;M552 P192.168.0.98 ;Fixed IP Address
;M554 P192.168.0.1 ;Gateway
;M553 P255.255.255.0 ;Netmask

; Access point is configured manually via M587 by the user
M586 P0 S1 ; Enable HTTP
M586 P1 S1 ; Enable FTP
M586 P2 S0 ; Disable Telnet

; Fans
M950 F0 C"fan0" Q500 ; Set fan 0 value, PWM signal inversion and frequency.
M106 P0 T45 H1 ; Set fan 0. Thermostatic control is turned on at 45 celcius.
M106 P0 S0 ; Switch cooling fan off

; Accelerometer
M955 P0 C"spi.cs3+spi.cs4"

; Tools
M563 P0 D0 H1 F0 ; Define tool 0
G10 P0 X50.5 Y56 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
M207 S1.2 F1200 ; set 1.2mm retract distance for G10 command

; Select Tool
T0

; Custom settings are not configured

deployprobe.g
; BLTouch probe deploy
M280 P3 S10

retractprobe.g
; BLTouch probe retract
M280 P3 S90

droftarts

@daniel-armstrong

I'm assuming you are using RRF 3.x. It looks like you have some RRF 2.x code in your config.g. See https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_connecting#software-setup

You haven't defined the probe servo pin with M950:

;Touch Probe
M558 P9 C"^zprobe.in" H5 F100 T2000 ; BLTouch Probe
G31 P50 X43.07 Y4.68 Z1.5 ; Set Z probe trigger value, offset and trigger height - Increase Z value to move bed closer to nozzle

So add
M950 S0 C"exp.heater3" ; define probe servo pin

You don't need this line:

; Disabled heater to free up PWM pin For BLTouch
M307 H3 A-1 C-1 D-1

Your probe commands should reference the probe servo pin, not the pin directly (that's RRF 2.x)

deployprobe.g
; BLTouch probe deploy
M280 P3 S10

retractprobe.g
; BLTouch probe retract
M280 P3 S90

So above should be M280 P0 S10 and M280 P0 S90

Ian

daniel.armstrong

droftarts,
Thanks so much for the help, the probe is now deploying and retracting on command.