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    COREXY Homing issues

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    • Pierrelitoundefined
      Pierrelito
      last edited by

      Hello everybody,

      I am currently setting RRF 3.4 up on my Voron 0.1.
      I run into some issues with the axis and homing X and Y:

      • When I home X (to max position 120mm), it does the first bump into the endstop, goes back 5mm then ram the endstop and causing a slight movement in -Y. I have to hit "emergency stop", never been able to home this axis.

      • When I home Y (to max position 120mm), the first bump into the endstop is good, then it goes to Y80 while the X axis is moving toward its Lowest position.. It then does bump correctly in the endstop and considering the Homing OK.

      Config.g:
      General
      M550 P"Voron 0.1" ; set hostname

      ; Network
      M552 S1 ; configure WiFi adapter
      M586 P0 S1 ; configure HTTP
      M586 P1 S1 ; configure FTP

      ; Smart Drivers
      ;M569 P0.0 S1 D2 ; driver 0.0 goes forwards (X axis)
      ;M569 P0.1 S0 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 (extruder 0)

      M569 P0.0 S1 D3 V20 ; physical drive 0.0 goes forwards
      M569 P0.1 S1 D3 V20 ; physical drive 0.1 goes forwards
      M569 P0.2 S1 D3 V20 ; physical drive 0.2 goes forwards
      M569 P0.3 S1 D3 V20

      ; Kinematics
      M669 K1 ; configure CoreXY kinematics
      M667 S1;

      ; 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 ; set axis mapping
      M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation
      M906 X800 Y800 Z800 ; set axis driver currents
      M92 X80 Y80 Z400 ; configure steps per mm
      M208 X0:120 Y0:120 Z0:120 ; set minimum and maximum axis limits
      M566 X900 Y900 Z25 ; set maximum instantaneous speed changes (mm/min)
      M203 X6000 Y6000 Z180 ; set maximum speeds (mm/min)
      M201 X500 Y500 Z30 ; set accelerations (mm/s^2)

      ; Extruders
      M584 E0.3 ; set extruder mapping
      M350 E16 I1 ; configure microstepping with interpolation
      M906 E1000 ; set extruder driver currents
      M92 E735 ; configure steps per mm
      M566 E120 ; set maximum instantaneous speed changes (mm/min)
      M203 E3600 ; set maximum speeds (mm/min)
      M201 E250 ; set accelerations (mm/s^2)

      ; Probes
      ;M558 K0 P0 H5 F120 T6000 ; configure manual probe via slot #0
      ;G31 P500 X0 Y0 Z0.7 ; set Z probe trigger value, offset and trigger height

      ; Endstops
      M574 X2 P"io0.in" S1 ; configure X axis endstop
      M574 Y2 P"io1.in" S1 ; configure Y axis endstop
      M574 Z1 P"io2.in" S1 ; configure Z axis endstop

      ; Mesh Bed Compensation
      M557 X25:95 Y25:95 S40:40 ; define grid for mesh bed compensation

      ; Sensors
      M308 S0 P"temp0" Y"thermistor" A"Heated Bed" T100000 B4725 C7.06e-8 ; configure sensor #0
      M308 S1 P"temp1" Y"thermistor" A"Nozzle" T100000 B4725 C7.06e-8 ; configure sensor #1

      ; Heaters
      M950 H0 C"out0" T0 ; create heater #0
      M143 H0 P0 T0 C0 S115 A0 ; configure heater monitor #0 for heater #0
      M307 H0 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #0
      M950 H1 C"out1" T1 ; create heater #1
      M143 H1 P0 T1 C0 S290 A0 ; configure heater monitor #0 for heater #1
      M307 H1 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #1

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

      ; Fans
      M950 F0 C"out6" ; create fan #0
      M106 P0 S0 L0 X1 B0.1 ; configure fan #0
      M950 F1 C"out5" ; create fan #1
      M106 P1 S0 B0.1 H1 T20 ; configure fan #1
      ;M950 F2 C"out5" ; create fan #2
      ;M106 P2 S0 L0 X1 B0.1 ; configure fan #2

      ; Tools
      M563 P0 D0 H1 F0 ; create tool #0
      M568 P0 R0 S0 ; set initial tool #0 active and standby temperatures to 0C

      ; Miscellaneous
      M501 ; load saved parameters from non-volatile memory

      Homex.g
      ; homex.g
      ; called to home the X axis
      ;
      ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 20:05:47 GMT+0100 (heure normale d’Europe 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 X
      var maxTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
      G1 H1 X120 F600 ; coarse home in the -X direction
      G1 H2 X-5 F600 ; move back 5mm
      G1 H1 X120 F300 ; fine home in the -X direction
      G1 H2 Z-5 F6000 ; lower Z again

      Homey.g

      ; homey.g
      ; called to home the Y axis
      ;
      ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 20:05:47 GMT+0100 (heure normale d’Europe 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 Y
      var maxTravel = move.axes[1].max - move.axes[1].min + 5 ; calculate how far Y can travel plus 5mm
      G1 H1 Y120 F600 ; coarse home in the -Y direction
      G1 H2 Y-5 F3000 ; move back 5mm
      G1 H1 Y120 F500 ; fine home in the -Y direction
      G1 H2 Z-5 F6000 ; lower Z again

      Thank you in advance for any help you can provide.

      1 Reply Last reply Reply Quote 0
      • oliofundefined
        oliof
        last edited by

        your homex.gnand homey.g dontatch what you describe, they look like normal homing sequences to me. do you have homeall.g as well? if yes, please share.

        If a sudden stop of the X motion jumps your y motion, it's likely a mechanical issue (skewed X gantry or issues with (uneven) belt tension).

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

        Pierrelitoundefined 1 Reply Last reply Reply Quote 0
        • Pierrelitoundefined
          Pierrelito @oliof
          last edited by Pierrelito

          @oliof
          Hi
          The homeall only bump the y Axis on its max position until I shutdown the printer.
          Here is the Homeall.g

          ; homeall.g
          ; called to home all axes
          ;
          ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 14:10:44 GMT+0100 (heure normale d’Europe 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
          G1 H1 X{var.xTravel} F600 ; coarse home in the +X direction
          G1 H1 Y{var.yTravel} F600 ; coarse home in the +Y direction
          G1 H2 X-5 Y-5 F6000 ; move back 5mm
          G1 H1 X{var.xTravel} Y{var.yTravel} F300 ; fine home
          G1 H1 X{var.xTravel} F300 ; fine home in the +X direction
          G1 H1 Y{var.yTravel} F300 ; fine home in the +Y direction
          G90 ; absolute positioning

          ; home Z
          var zTravel = move.axes[2].max - move.axes[2].min + 5 ; calculate how far Z can travel plus 5mm
          G91 ; relative positioning
          G1 H1 Z{-var.zTravel} F600 ; coarse home in the -Z direction
          G1 H2 Z5 F6000 ; move back 5mm
          G1 H1 Z-10 F300 ; fine home in the -Z direction
          G90 ; absolute positioning

          Belts Tensions are very similar,
          Skew is around '0.9%) EDIT 0.9° according to various skew tests done this week with marlin

          Pierrelitoundefined 1 Reply Last reply Reply Quote 0
          • Pierrelitoundefined
            Pierrelito @Pierrelito
            last edited by

            I have solved my issue

            ; homex.g
            ; called to home the X axis
            ;
            ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 20:05:47 GMT+0100 (heure normale d’Europe 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 X
            G91
            var maxTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
            G1 H1 X{var.maxTravel} F600 ; coarse home in the +X direction
            G1 H1 X-5 F6000 ; move back 5mm
            G1 H1 X{var.maxTravel} F300 ; fine home in the +X direction
            ; relative positioning
            G1 H2 Z-5 ; move Z relative to current position to avoid dragging nozzle over the bed
            G90 ; absolute positioning ; lower Z again

            ; homey.g
            ; called to home the Y axis
            ;
            ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 20:05:47 GMT+0100 (heure normale d’Europe 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 Y
            var maxTravel = move.axes[1].max - move.axes[1].min + 5 ; calculate how far Y can travel plus 5mm
            G1 H1 Y{var.maxTravel} F600 ; coarse home in the +Y direction
            G1 H1 Y-5 F3000 ; move back 5mm
            G1 H1 Y{var.maxTravel} F500 ; fine home in the +Y direction
            G91 ; relative positioning
            G1 H1 Z-5 ; move Z relative to current position to avoid dragging nozzle over the bed
            G90 ; absolute positioning

            ; Configuration file for RepRapFirmware on Duet 3 Mini 5+ WiFi
            ; executed by the firmware on start-up
            ;
            ; generated by RepRapFirmware Configuration Tool v3.5.0-rc.2+6 on Fri Feb 23 2024 14:10:43 GMT+0100 (heure normale d’Europe centrale)

            ; General
            M550 P"Voron 0.1" ; set hostname

            ; Network
            M552 S1 ; configure WiFi adapter
            M586 P0 S1 ; configure HTTP
            M586 P1 S1 ; configure FTP

            ; Smart Drivers
            ;M569 P0.0 S1 D2 ; driver 0.0 goes forwards (X axis)
            ;M569 P0.1 S0 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 (extruder 0)

            M569 P0.0 S0 D3 V20 ; physical drive 0.0 goes forwards
            M569 P0.1 S0 D3 V20 ; physical drive 0.1 goes forwards
            M569 P0.2 S1 D3 V20 ; physical drive 0.2 goes forwards
            M569 P0.3 S1 D3 V20

            ; Kinematics
            M669 K1 ; configure CoreXY kinematics
            M667 S1;

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

            ; Axes
            M584 X0.1 Y0.0 Z0.2 ; set axis mapping
            M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation
            M906 X800 Y800 Z800 ; set axis driver currents
            M92 X80 Y80 Z400 ; configure steps per mm
            M208 X0:120 Y0:120 Z0:120 ; set minimum and maximum axis limits
            M566 X900 Y900 Z25 ; set maximum instantaneous speed changes (mm/min)
            M203 X6000 Y6000 Z180 ; set maximum speeds (mm/min)
            M201 X500 Y500 Z30 ; set accelerations (mm/s^2)

            ; Extruders
            M584 E0.3 ; set extruder mapping
            M350 E16 I1 ; configure microstepping with interpolation
            M906 E1000 ; set extruder driver currents
            M92 E735 ; configure steps per mm
            M566 E120 ; set maximum instantaneous speed changes (mm/min)
            M203 E3600 ; set maximum speeds (mm/min)
            M201 E250 ; set accelerations (mm/s^2)

            ; Probes
            ;M558 K0 P0 H5 F120 T6000 ; configure manual probe via slot #0
            ;G31 P500 X0 Y0 Z0.7 ; set Z probe trigger value, offset and trigger height

            ; Endstops
            M574 X2 P"io0.in" S1 ; configure X axis endstop
            M574 Y2 P"io1.in" S1 ; configure Y axis endstop
            M574 Z1 P"io2.in" S1 ; configure Z axis endstop

            ; Mesh Bed Compensation
            M557 X25:95 Y25:95 S40:40 ; define grid for mesh bed compensation

            ; Sensors
            M308 S0 P"temp0" Y"thermistor" A"Heated Bed" T100000 B4725 C7.06e-8 ; configure sensor #0
            M308 S1 P"temp1" Y"thermistor" A"Nozzle" T100000 B4725 C7.06e-8 ; configure sensor #1

            ; Heaters
            M950 H0 C"out0" T0 ; create heater #0
            M143 H0 P0 T0 C0 S115 A0 ; configure heater monitor #0 for heater #0
            M307 H0 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #0
            M950 H1 C"out1" T1 ; create heater #1
            M143 H1 P0 T1 C0 S290 A0 ; configure heater monitor #0 for heater #1
            M307 H1 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #1

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

            ; Fans
            M950 F0 C"out6" ; create fan #0
            M106 P0 S0 L0 X1 B0.1 ; configure fan #0
            M950 F1 C"out5" ; create fan #1
            M106 P1 S0 B0.1 H1 T20 ; configure fan #1
            ;M950 F2 C"out5" ; create fan #2
            ;M106 P2 S0 L0 X1 B0.1 ; configure fan #2

            ; Tools
            M563 P0 D0 H1 F0 ; create tool #0
            M568 P0 R0 S0 ; set initial tool #0 active and standby temperatures to 0C

            ; Miscellaneous
            M501 ; load saved parameters from non-volatile memory

            Phaedruxundefined gloomyandyundefined 2 Replies Last reply Reply Quote 0
            • Phaedruxundefined
              Phaedrux Moderator @Pierrelito
              last edited by

              @Pierrelito said in COREXY Homing issues:

              G1 H1 X-5 F6000 ; move back 5mm

              Don't use H1 on your back off move. The H1 means to move until an endstop switch is triggered. Just leave the H off entirely, or use H0 if you want to be specific.

              Z-Bot CoreXY Build | Thingiverse Profile

              1 Reply Last reply Reply Quote 0
              • gloomyandyundefined
                gloomyandy @Pierrelito
                last edited by

                @Pierrelito I'd also avoid the use of

                 G1 H2 X-5 Y-5 F6000 ; move back 5mm

                as well at that point your axis is homed so you can just use a normal (H0) move to back away from the endstop. H2 means use an individual motor move, which I'm not sure you want with a corexy printer.

                1 Reply Last reply Reply Quote 1
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