Duet3 wifi bltouch wiring



  • Using the wiki page https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe, I have connected my bltouch on IO_7 connector: io7.in, io7.out, gnd (black and brown), 5v. For software, I used the configuration tool and set: Input Pin io7.in, Modulation Pin io7.out, PWM Control Channel (OUT7). I also set endstop to z-probe, bltouch.

    I suspect that the PWM control channel OUT7 is incorrect. It seems that the schematic isn't released yet... but my guess is that one of the PWM pins has an optional output on io7.out. Is that right? Which one?

    Love to get the schematic so that I can figure these things out for myself :).
    Could you update the wiki page to provide this info?

    Thank you,
    Bruce



  • @bjbeare To be clear... I am using Duet3 6HC.



  • @bjbeare said in Duet3 wifi bltouch wiring:

    I suspect that the PWM control channel OUT7 is incorrect.

    did you invert the pwm signal?



  • Just tried that. Thank you. It didn't seem to make a difference. Here is the current config.g bits.

    ; Endstops
    M574 X1 S0 P"!^io0.in" ; configure active-low endstop for low end on X via pin !^io0.in
    M574 Y1 S0 P"!^io1.in" ; configure active-low endstop for low end on Y via pin !^io1.in
    M574 Z1 S2 ; configure Z-probe endstop for low end on Z

    ; Z-Probe
    M950 S0 C"!out7" ; create servo pin 0 for BLTouch
    M558 P9 C"io7.in+io7.out" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
    M557 X15:215 Y15:195 S20 ; define mesh grid



  • @bjbeare said in Duet3 wifi bltouch wiring:

    M950 S0 C"!out7" ; create servo pin 0 for BLTouch
    M558 P9 C"io7.in+io7.out" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds

    can you try
    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



  • ; Z-Probe
    M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
    M558 P9 C"io7.in" H10 F120 T3600 ; set Z probe type to bltouch and the dive height + speeds

    I have a functional BLtouch on io7 with these commands.



  • @Luke-sLaboratory said in Duet3 wifi bltouch wiring:

    M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
    M558 P9 C"io7.in" H10 F120 T3600 ; set Z probe type to bltouch and the dive height + speeds

    The bltouch flashes and probe does not deploy.

    ; deployprobe.g
    ; called to deploy a physical Z probe
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.4 on Sun Dec 29 2019 09:17:44 GMT-0800 (Pacific Standard Time)
    M280 P0 S10 ; deploy BLTouch

    ; retractprobe.g
    ; called to retract a physical Z probe
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.4 on Sun Dec 29 2019 09:17:44 GMT-0800 (Pacific Standard Time)
    M280 P0 S90 ; retract BLTouch

    ; Configuration file for Duet 3 (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.4 on Sun Dec 29 2019 09:17:44 GMT-0800 (Pacific Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"Duet 3" ; set printer name

    M667 S1 ; select CoreXY mode

    ; Drives
    M569 P0.0 S1 ; physical drive 0.0 goes forwards
    M569 P0.1 S1 ; physical drive 0.1 goes forwards
    M569 P0.2 S1 ; physical drive 0.2 goes forwards
    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 Z4000.00 E420.00 ; 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 X450 Y450 Z450 S0 ; set axis maxima

    ; Endstops
    M574 X1 S0 P"!^io0.in" ; configure active-low endstop for low end on X via pin !^io0.in
    M574 Y1 S0 P"!^io1.in" ; configure active-low endstop for low end on Y via pin !^io1.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" H10 F120 T3600 ; set Z probe type to bltouch and the dive height + speeds

    G31 P500 X0 Y0 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"out0" T0 ; create bed heater output on out0 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"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
    M143 H1 S280 ; set temperature limit for heater 1 to 280C
    M307 H1 B0 S1.00 ; disable bang-bang mode for the nozzle heater and set PWM limit

    ; Fans
    M950 F0 C"out8" Q500 ; create fan 0 on pin out8 and set its frequency
    M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"out9" Q500 ; create fan 1 on pin out9 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



  • @bjbeare said in Duet3 wifi bltouch wiring:

    The bltouch flashes and probe does not deploy.

    if it fails the self test on powerup, something else is wrong.

    did you try the inversion?



  • @bjbeare said in Duet3 wifi bltouch wiring:

    M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
    M558 P9 C"io7.in" H10 F120 T3600 ; set Z probe type to bltouch and the dive height + speeds

    These suggestions have been good. I'm able to send commands now and get the probe to deploy/test/retract. I'm still getting a flashing indication during homing and homing is failing. Working the issue.



  • @bjbeare

    Thanks for reporting back!

    Sounds like a wiring issue or something with the ferrous core positioning -

    Is it mounted straight in reference to gravity? Sometimes they bind funny


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