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    BLTOUCH + DUET3 6HC

    Scheduled Pinned Locked Moved Solved
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    • nico.rastundefined
      nico.rast
      last edited by

      Hi guys!
      Yesterday, I finally received the Duet3 6HC, and following the guide, I managed to install everything. I calibrated the X and Y axes with their respective endstops, but I am having trouble zeroing the Z-axis with the BLTouch. As mentioned in the title, I have a Duet3 6HC, and following your guide, I wired the BLTouch.
      Upon startup, if I bring the Z-axis to the lower point where the BLTouch makes contact, it starts blinking. However, if I perform a reset without touching the print bed, it remains solid red.

      It doesn't respond to any command, neither the classic M280 nor M401 or M402.

      ; Configuration file for RepRapFirmware on Duet 3 Main Board 6HC
      ; executed by the firmware on start-up
      ;

      ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+3 on Tue Jan 16 2024 12:12:38 GMT+0100 (Ora standard dell’Europa centrale)

; General
M550 P"Duet 3" ; set hostname

; Smart Drivers
M569 P0.0 S0 D2 ; driver 0.0 goes backwards (X axis)
M569 P0.1 S1 D2 ; driver 0.1 goes forwards (Y axis)
M569 P0.2 S1 D2 ; driver 0.2 goes forwards (Z axis)
M569 P0.3 S1 D2 ; driver 0.3 goes forwards (Z axis)
M569 P0.4 S1 D2 ; driver 0.4 goes forwards (extruder 0)
M569 P0.5 S1 D2 ; driver 0.5 goes forwards (extruder 1)

; Motor Idle Current Reduction
M906 I30 ; set motor current idle factor
M84 S30 ; set motor current idle timeout

; Axes
M584 X0.0 Y0.1 Z0.2:0.3 ; set axis mapping
M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation
M906 X4000 Y4000 Z2000 ; set axis driver currents
M92 X64 Y40 Z400 ; configure steps per mm
M208 X0:400 Y0:800 Z0:450 ; set minimum and maximum axis limits
M566 X900 Y900 Z12 ; set maximum instantaneous speed changes (mm/min)
M203 X24000 Y24000 Z180 ; set maximum speeds (mm/min)
M201 X1500 Y1500 Z100 ; set accelerations (mm/s^2)

; Extruders
M584 E0.4:0.5 ; set extruder mapping
M350 E16:16 I1 ; configure microstepping with interpolation
M906 E800:800 ; set extruder driver currents
M92 E409:409 ; configure steps per mm
M566 E120:120 ; set maximum instantaneous speed changes (mm/min)
M203 E3600:3600 ; set maximum speeds (mm/min)
M201 E250:250 ; set accelerations (mm/s^2)

; Kinematics
M669 K0 ; configure Cartesian kinematics

; Probes
M558 K0 P9 C"io4.in" H5 F120 T6000 ; configure BLTouch probe via slot #0
G31 P500 X120 Y30 Z5 ; set Z probe trigger value, offset and trigger height
M950 S0 C"io4.out" ; create servo #0 for BLtouch

; Endstops
M574 X1 P"io0.in" S1 ; configure X axis endstop
M574 Y1 P"io1.in" S1 ; configure Y axis endstop
M574 Z1 S2 ; configure Z axis endstop

; Mesh Bed Compensation
M557 X25:415 Y25:700 S40:40 ; define grid for mesh bed compensation

; Sensors
M308 S0 P"temp0" Y"thermistor" A"PIATTO" T100000 B3988 ; configure sensor #0
M308 S1 P"temp1" Y"thermistor" A"UGELLO 1" T100000 B4138 ; configure sensor #1
M308 S2 P"temp2" Y"thermistor" A"UGELLO 2" T100000 B4138 ; configure sensor #2

; Heaters
M950 H0 C"out0" T0 ; create heater #0
M143 H0 P0 T0 C0 S140 A0 ; configure heater monitor #0 for heater #0
M307 H0 R2.43 D5.5 E1.35 K0.56 B1 ; configure model of heater #0
M950 H1 C"out1" T1 ; create heater #1
M143 H1 P0 T1 C0 S350 A0 ; configure heater monitor #0 for heater #1
M307 H1 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #1
M950 H2 C"out2" T2 ; create heater #2
M143 H2 P0 T1 C0 S350 A0 ; configure heater monitor #0 for heater #2
M307 H2 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #2

; Heated beds
M140 P0 H0 ; configure heated bed #0

; Fans
M950 F0 C"out7" ; create fan #1
M106 P0 C"UGELLO" S0 B0.1 H1 T45 ; configure fan #0
M950 F2 C"out8" ; create fan #2
M106 P2 C"UGELLO 1 MATERIALE" S0 L0 X1 B0.1 ; configure fan #2
M950 F3 C"out9" ; create fan #3
M106 P3 C"UGELLO 2 MATERIALE" S0 L0 X1 B0.1 ; configure fan #3

; Tools
M563 P0 S"UGELLO 1" D0 H1 F2:0 ; create tool #0
M568 P0 R0 S0 ; set initial tool #0 active and standby temperatures to 0C
M563 P1 S"UGELLO 2" D1 H2 F3:1 ; create tool #1
M568 P1 R0 S0 ; set initial tool #1 active and standby temperatures to 0C

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+3 on Tue Jan 16 2024 12:12:41 GMT+0100 (Ora standard dell’Europa centrale)

; lift Z
G91 ; relative positioning
G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home Z
var xCenter = move.compensation.probeGrid.mins[0] + (move.compensation.probeGrid.maxs[0] - move.compensation.probeGrid.mins[0]) / 2 - sensors.probes[0].offsets[0]
var yCenter = move.compensation.probeGrid.mins[1] + (move.compensation.probeGrid.maxs[1] - move.compensation.probeGrid.mins[1]) / 2 - sensors.probes[0].offsets[1]
G1 X{var.xCenter} Y{var.yCenter} F6000 ; go to bed centre
G30 ; probe the bed

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+3 on Tue Jan 16 2024 12:12:41 GMT+0100 (Ora standard dell’Europa centrale)

; lift Z
G91 ; relative positioning
G1 H2 Z5 F6000 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home XY
var xTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
var yTravel = move.axes[1].max - move.axes[1].min + 5 ; calculate how far Y can travel plus 5mm
G91 ; relative positioning
G1 H1 X{-var.xTravel} Y{-var.yTravel} F600 ; coarse home in the -X and -Y directions
G1 H2 X5 Y5 F6000 ; move back 5mm
G1 H1 X{-var.xTravel} Y{-var.yTravel} F300 ; fine home in the -X and -Y directions
G90 ; absolute positioning

; home Z
var xCenter = move.compensation.probeGrid.mins[0] + (move.compensation.probeGrid.maxs[0] - move.compensation.probeGrid.mins[0]) / 2 - sensors.probes[0].offsets[0]
var yCenter = move.compensation.probeGrid.mins[1] + (move.compensation.probeGrid.maxs[1] - move.compensation.probeGrid.mins[1]) / 2 - sensors.probes[0].offsets[1]
G1 X{var.xCenter} Y{var.yCenter} F6000 ; go to bed centre
G30 ; probe the bed

      I've tried with two new original BLTouch versions 3.1. I don't know what to do. Thanks in advance!

      oliofundefined 1 Reply Last reply Reply Quote 0
      • oliofundefined
        oliof @nico.rast
        last edited by

        @nico-rast if it doesn't respond to commands, you will most likely have mixed up GND and Signal wires (black and white). Try swapping them around.

        <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

        nico.rastundefined 1 Reply Last reply Reply Quote 0
        • nico.rastundefined
          nico.rast @oliof
          last edited by

          @oliof I've checked the connections, and they are done correctly. I connected as follows:

          io4.in --> yellow cable
          next to io4.in i put Brown and black (GND)
          io4.out --> white cable
          last pin red wire +5V

          It's possible that I'm using a cable that's too long? Approximately 3 meters.

          All the cables of my printer are insulated.

          oliofundefined 2 Replies Last reply Reply Quote 0
          • oliofundefined
            oliof @nico.rast
            last edited by oliof

            @nico-rast 3m isnlonger than I would use, but it may work. Make sure the wires are shielded, braided, or protected against noise with a ferrite bead, especially if they run along motor wires.

            Also, just for completeness sake: If this isn't a genuine BLTouch, the wire colors may be different.

            <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

            nico.rastundefined 1 Reply Last reply Reply Quote 0
            • nico.rastundefined
              nico.rast @oliof
              last edited by

              @oliof
              genuine bltouch!
              The last test I want to do is to connect it with the original BLTouch extension to the board and see if it works. I'm not so sure that the programming is correct, but I followed the guide. Hopefully, it goes well.

              1 Reply Last reply Reply Quote 0
              • oliofundefined
                oliof @nico.rast
                last edited by

                @nico-rast swap yellow and white. The instructions on https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_connecting are a bit confusing.

                white needs to go on io4.in, yellow on io4.out.

                Also please make sure that brown or black are really on GND, there are 5 pins on the IO header.

                <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

                nico.rastundefined 1 Reply Last reply Reply Quote 0
                • nico.rastundefined
                  nico.rast @oliof
                  last edited by

                  @oliof
                  Thanks man IT WORKS!!!!

                  1 Reply Last reply Reply Quote 1
                  • Phaedruxundefined Phaedrux marked this topic as a question
                  • Phaedruxundefined Phaedrux has marked this topic as solved
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