BLTouch not working after Firmware upgrade



  • Hi i just upgraded my Duet Ethernet to the newest reprap firmware 3.x
    Before i was using reprap 2.x and my BLTouch worked good. I have not changed any connections. I've included my config.g and how i have the BLTouch wired, hoping someone can figure out what i did wrong. I used the reprap config tool. When I 1st turn on the printer the bltouch glows red, the probe deploys and retracts and then it sits there flashing red , it doesn't respond when i try to deploy or retract from the console and resetting the bltouch from the console doesn't help.

    Capture.JPG

    Config.g

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.8 on Fri Nov 20 2020 16:34:34 GMT-0500 (Eastern Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"TLM" ; set printer name
    M665 R160 L437 B160 H250 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; put your endstop adjustments here, or let auto calibration find them

    ; 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 S1 ; physical drive 0 goes forwards
    M569 P1 S1 ; physical drive 1 goes forwards
    M569 P2 S1 ; physical drive 2 goes forwards
    M569 P3 S1 ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3 ; set drive mapping
    M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z80.00 E407.63 ; set steps per mm
    M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
    M201 X1000.00 Y1000.00 Z1000.00 E1000.00 ; set accelerations (mm/s^2)
    M906 X1250 Y1250 Z1250 E1000 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 Z0 S1 ; set minimum Z

    ; Endstops
    M574 X2 S1 P"xstop" ; configure active-high endstop for high end on X via pin xstop
    M574 Y2 S1 P"ystop" ; configure active-high endstop for high end on Y via pin ystop
    M574 Z2 S1 P"zstop" ; configure active-high endstop for high end on Z via pin zstop

    ; Z-Probe
    M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch
    M558 P9 C"^zprobe.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 R155 S20 ; 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
    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
    M143 H0 S90 ; set temperature limit for heater 0 to 90C
    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
    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"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
    M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency
    M106 P2 S1 H1 T45 ; set fan 2 value. Thermostatic control is turned on

    ; Tools
    M563 P0 S"Hotend" 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
    M575 P1 S1 B57600 ; enable support for PanelDue
    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 loss


  • Moderator

    Did you also update your deploy and retract macros? The config tool would have generated new ones as well.



  • @Phaedrux yes, im using the ones that reprap config created.


  • Moderator

    Can you post them?

    If sending M401 M402 doesn't deploy or retract either the servo pin you're using doesn't match the pin name used in M950, or the servo index needs to change to 0 to match your M950 command, which would make sense if you were still using your old files, but not if you're using the new files from the generator.



  • @Phaedrux

    here they are

    ; deployprobe.g
    ; called to deploy a physical Z probe
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.8 on Fri Nov 20 2020 16:34:34 GMT-0500 (Eastern Standard Time)
    M280 P0 S10 ; deploy BLTouch

    ; retractprobe.g
    ; called to retract a physical Z probe
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.8 on Fri Nov 20 2020 16:34:34 GMT-0500 (Eastern Standard Time)
    M280 P0 S90 ; retract BLTouch



  • config.json

    also this, not sure if helps you


  • Moderator

    Those look correct. Are you sure you're using heater3 pin? Try heater7 pin instead?



  • @Phaedrux

    My friend i appreciate the time you have spent trying to help. However it appears nothing was wrong. i had a close look at the bltouch and discovered there was a string of PETG wrapped around the bltouch pin, once i removed that all works as it should. Cant believe i didn't notice that earlier.


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