Duet 3 and BL Touch
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Hi All,
I'm setting up my BL touch on my Duet 3 board, but I can't seem to get the settings correct.
My BL touch is Creality branded and has white, black, yellow, blue and red wires. I have followed the wiki guide and connected the plug to IO_7.
The plug is wired as follows:
3.3V -> left unpopulated
IN -> White
GND -> Black and Blue
OUT-> Yellow
+5V -> RedI have tested resistance from the terminal at the BL touch to terminal at the Duet 3 and the wiring is continuous.
On startup, the BLtouch LED is frequently flashing in sets of 2 quick red pulses , and the pin does not move on M401/M402. The pin does not deploy on G30 and the hotend will crash into the bed if I don't Emergency stop.
I have rewired the connectors, and also tried connecting to IO_4 & IO_5.
I've replaced the BL touch pin, and even tried swapping the white and black wires without luck.Read the following pages as well...
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe
https://duet3d.dozuki.com/Wiki/BLTouch_Troubleshooting
https://betrue3d.dk/bltouch-on-duet-wifi-configuratio-and-usage/#Macroslooking forward to your expert advice!
config.g; Configuration file for Duet 3 (firmware version 3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Mar 31 2021 21:23:47 GMT+1100 (Australian Eastern Daylight Time) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"duet 3" ; set printer name ; Network M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; Drives M569 P0.0 S1 ; physical drive 0.0 goes forwards M569 P0.1 S0 ; physical drive 0.1 goes backwards M569 P0.2 S0 ; physical drive 0.2 goes backwards M569 P0.3 S1 ; physical drive 0.3 goes forwards M584 X0.0 Y0.1 Z0.2 E0.3 ; 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 X12000.00 Y12000.00 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 Y1000 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 X450 Y450 Z470 S0 ; set axis maxima ; Endstops M574 X1 S1 P"io4.in" ; configure active-high endstop for low end on X via pin io4.in M574 Y2 S1 P"io3.in" ; configure active-high endstop for high end on Y via pin io3.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 G31 P500 X-41 Y5 Z2.5 ; set Z probe trigger value, offset and trigger height M557 X15:215 Y15:195 S20 ; define mesh grid ; Heaters M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0 M950 H0 C"out2" T0 ; create bed heater output on out2 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"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1 M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1 M307 H1 B0 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"out9" Q500 ; create fan 0 on pin out9 and set its frequency M106 P0 S0 H T45 ; set fan 0 value. Thermostatic control is turned on M950 F1 C"out8" 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 P1 S"extruder 1" D0 H1 F0 ; define tool 1 G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C ; Custom settings are not defined ; Miscellaneous M501 ; load saved parameters from non-volatile memory M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power lossdeployprobe.g
code_t; deployprobe.g ; called to deploy a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Mar 31 2021 21:23:47 GMT+1100 (Australian Eastern Daylight Time) M280 P0 S10 ; deploy BLTouch extretractprobe.g
; retractprobe.g ; called to retract a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Mar 31 2021 21:23:47 GMT+1100 (Australian Eastern Daylight Time) M280 P0 S90 ; retract BLTouch -
@akayoshi What happens if you apply just 5v and ground? The probe should power up and do a self test if it's vertical at the time.
Can you also provide the results of M122 and M98 P"config.g"?
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This post is deleted! -
I worked it out last night. The creality branded bl touch loom was wired differently to what the guide indicates https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe . I bought a new bl touch and compared the terminals. I guess not all is lost, now I can install the spare bl touch on my second machine!
The guide instructions
3.3V - nil
In - White
GND - black and brown or blue
Out - Orange or yellow
+5V - RedThe creality loom from left to right(with metal terminals facing you)
white
black
yellow
red
blueThe Official BL touch loom from left to right(with metal terminals facing you)
brown
red
yellow
black
whiteSo in the end I connected the duet end as follows:
3.3V - Nil
In - blue
GND - red + white
Out - Yellow
+5v - blackHopefully this will help somebody else with a creality based BL-touch.
Cheers
P
