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    Mesh Bed Leveling Not moving bed

    Duet Hardware and wiring
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    • CTRDevelopmentsundefined
      CTRDevelopments
      last edited by

      Hi

      I am finding that mesh bed leveling is not moving the bed. I have even tried with a really badly distorted bed, and still the z axis does not move

      Running M122 I get

      Bed compensation in use: none, comp offset 0.000

      My homez is

      ; homez.g
      ; called to home the Z axis
      G29 S2
      G91 ; Relative mode
      G1 S2 Z5 F5000 ; Lower the bed
      G90 ; back to absolute positioning
      G1 X150 Y100 F50000 ; Position the endstop above the bed centre
      G91 ; Relative mode
      G4 P500 ; wait 500msec
      G1 Z-300 S1 F1000 ; Move Z down until the switch triggers (first pass)
      G4 P500 ; wait 500msec
      G1 Z5 F5000 ; Lift Z
      G4 P500 ; wait 500msec
      G30
      G4 P500 ; wait 500msec
      G1 Z5 F5000 ; Drop the Bed
      G90 ; Back to absolute positioning

      the start of my GCODE calls

      G28 ; Home All Axis
      G29 S0 ; Probe Bed For Mesh Bed Levelling

      and homeall just calls homex, homey and homez

      any thoughts?

      Is there anyway to see the compensation moves as I understand the z position on the webpage is just the commanded 'overall' not including the compensation

      Cheers

      Matt

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      • timcurtis67undefined
        timcurtis67
        last edited by

        If your bed is twisted or wraped below Z0.0 then your Z axis travel limits must be set to allow the Z axis to travel below 0.0 (M208 settings in your config.g file)

        See https://duet3d.dozuki.com/Wiki/Gcode#Section_M208_Set_axis_max_travel

        So if your bed is warped to .6 below Z 0.0 then set your M208 Z-.6 S1 in config.g.

        Then the hotend can follow the bed wrap below Z0.

        *** caution - you will have the ability to move your hotend Z axis to -.6 which could cause a crash into the bed if you don't have mesh comp turned on.

        You can turn on mesh comp at the end of your config.g file to help avoid crashes by adding a G29 S1 on the last line.

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        • timcurtis67undefined
          timcurtis67
          last edited by

          One more thing occurred after re-reading your post. You are turning on bed mesh comp right?

          Somewhere you need a G29 S1 to use the bed mesh comp.

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          • CTRDevelopmentsundefined
            CTRDevelopments
            last edited by

            Tim, yes, I do have a G29 S1, but my min z is 0 in the config so could well be the issue. I will try that now. Many thanks

            question, on G29 S1 vs S0. If I do G29 S0 do i actually need the S1 afterwards? Does the S0 not also turn it on as well as probe?

            timcurtis67undefined 1 Reply Last reply Reply Quote 0
            • timcurtis67undefined
              timcurtis67 @CTRDevelopments
              last edited by

              @CTRDevelopments said in Mesh Bed Leveling Not moving bed:

              Tim, yes, I do have a G29 S1, but my min z is 0 in the config so could well be the issue. I will try that now. Many thanks

              question, on G29 S1 vs S0. If I do G29 S0 do i actually need the S1 afterwards? Does the S0 not also turn it on as well as probe?

              Hi, Yes G29 S0 is suppose to turn on the bed mesh comp after probing per the gcode docs.

              "S0 (default if no S parameter) Probe the bed, save the height map in a file on the SD card, and activate bed compensation. The height map is stored in file is /sys/heightmap.csv."

              https://duet3d.dozuki.com/Wiki/Gcode#Section_G29_Mesh_bed_probe

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              • CTRDevelopmentsundefined
                CTRDevelopments
                last edited by

                I am still not getting any response from the mesh leveling. I have previously set up the C axis

                M584 X0 Y1 Z2 C7 E3:4:5:6
                M208 X-35:328.5 Y-49:243 Z-1:300 C0:500

                Cheers

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                • Phaedruxundefined
                  Phaedrux Moderator
                  last edited by

                  Please post your full config.g and homeall.g

                  What firmware version and board are you using?

                  If you are getting Bed compensation in use: none then it is being turned off at some point.

                  What happens if you send G29 S1 in the console and then send M122, does it show Bed compensation in use: mesh?

                  Are you able to view the heightmap in DWC?

                  Z-Bot CoreXY Build | Thingiverse Profile

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                  • CTRDevelopmentsundefined
                    CTRDevelopments
                    last edited by

                    Firmware 2.05
                    Sending G29 S1 and M122 gives ---- Bed compensation in use: mesh, comp offset 0.000
                    Yes, I can view the heightmap and it has a max deviation of 0.3mm (deliberately bad to test)

                    ; Configuration; Configuration file for Duet WiFi / Ethernet
                    ; executed by the firmware on start-up

                    ; General preferences
                    M111 S0 ; Debugging off
                    G21 ; Work in millimetres
                    G90 ; Send absolute coordinates...
                    M83 ; ...but relative extruder moves
                    M555 P2 ; Set firmware compatibility to look like Marlin

                    ; Network

                    ; Removed Network Details for Post

                    M552 S1 ; Enable Networking
                    M586 P0 S1 ; Enable HTTP
                    M586 P1 S0 ; Disable FTP
                    M586 P2 S0 ; Disable Telnet

                    M667 S1 ; Select CoreXY mode

                    ; Endstops
                    M574 X1 Y1 S3 ; Set X / Y endstop stall detection
                    M574 Z1 S2 ; Set Z endstop probe
                    M558 P7 X0 Y0 Z2 H3 F360 I0 T20000 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds
                    G31 P200 X0 Y0 Z0 ; Set Z probe trigger value, offset and trigger height
                    M557 X10:290 Y20:180 S40 ; Define mesh grid

                    ; Drive direction
                    M569 P0 S0 ; Drive 0 X
                    M569 P1 S0 ; Drive 1 Y
                    M569 P2 S1 ; Drive 2 Z
                    M569 P3 S0 ; Drive 3 E0
                    M569 P4 S0 ; Drive 4 E1
                    M569 P5 S1 ; Drive 5 E2
                    M569 P6 S1 ; Drive 6 E3
                    M569 P7 S0 ; Drive 7 COUPLER
                    M569 P8 S0 ; Drive 8 UNUSED
                    M569 P9 S0 ; Drive 9 UNUSED

                    M584 X0 Y1 Z2 C7 E3:4:5:6 ; Apply custom drive mapping
                    M208 X-35:328.5 Y-49:243 Z-1:300 C0:500 ; Set axis maxima & minima
                    M350 E8:8:8:8 C8 I0 ; Configure microstepping without interpolation
                    M350 X16 Y16 Z16 I1 ; Configure microstepping with interpolation
                    ;M92 X100 Y100 Z1600 C100 E417:417:417:417 ; Set steps per mm, Pre Hemera
                    M92 X100 Y100 Z1600 C100 E417:417:199:417 ; Set steps per mm
                    M566 X200 Y200 Z8 C2 E2:2:2:2 ; Set maximum instantaneous speed changes (mm/min) M566 X400 Y400 Z8 C2 E2:2:2:2
                    M203 X35000 Y35000 Z1200 C5000 E5000:5000:5000:5000 ; Set maximum speeds (mm/min)
                    M201 X2000 Y2000 Z400 C500 E2500:2500:2500:2500 ; Set accelerations (mm/s^2) M201 X6000 Y6000 Z400 C500 E2500:2500:2500:2500
                    M906 X2000 Y2000 Z1330 C400 E1680:1680:1330:1680 I30 ; Set motor currents (mA) and motor idle factor in percent
                    M84 S120 ; Set idle timeout

                    ;Stall Detection
                    M915 C S5 F0 H200 R4700 ; Coupler

                    ;Stall Detection
                    M915 X Y S5 F0 H400 R4700 ; X / Y Axes

                    ; Heaters
                    M305 P0 T100000 B4138 C0 ; Set thermistor
                    M143 H0 S225 ; Set temperature limit for heater 0 to 225C

                    M305 S"T0" P1 X201 ; Set thermistor
                    M143 H1 S300 ; Set temperature limit for heater 1 to 300C

                    M305 S"T1" P2 X200 ; Set thermistor
                    M143 H2 S300 ; Set temperature limit for heater 2 to 300C

                    M305 S"T2" P3 X203 ; Set thermistor
                    M143 H3 S300 ; Set temperature limit for heater 3 to 300C

                    M305 S"T3" P4 X202 ; Set thermistor
                    M143 H4 S300 ; Set temperature limit for heater 4 to 300C

                    ; Tools
                    M563 P0 S"T0" D0 H1 ; Define tool 0
                    G10 P0 X0 Y0 Z0 ; Reset tool 0 axis offsets
                    G10 P0 R0 S0 ; Reset initial tool 0 active and standby temperatures to 0C

                    M563 P1 S"T1" D1 H2 ; Define tool 1
                    G10 P1 X0 Y0 Z0 ; Reset tool 1 axis offsets
                    G10 P1 R0 S0 ; Reset initial tool 1 active and standby temperatures to 0C

                    M563 P2 S"T2" D2 H3 ; Define tool 2
                    G10 P2 X0 Y0 Z0 ; Reset tool 2 axis offsets
                    G10 P2 R0 S0 ; Reset initial tool 2 active and standby temperatures to 0C

                    M563 P3 S"T3" D3 H4 ; Define tool 3
                    G10 P3 X0 Y0 Z0 ; Reset tool 3 axis offsets
                    G10 P3 R0 S0 ; Reset initial tool 3 active and standby temperatures to 0C

                    ; Fans
                    M106 P0 S0 ; UNUSED
                    M106 P1 S255 H1 T70 ; T0 HE
                    M106 P2 S0 ; T0 PCF
                    M106 P3 S255 H2 T70 ; T1 HE
                    M106 P4 S0 ; T1 PCF
                    M106 P5 S255 H3 T70 ; T2 HE
                    M106 P6 S0 ; T2 PCF
                    M106 P7 S255 H4 T70 ; T3 HE
                    M106 P8 S0 ; T3 PCF

                    M593 F50 ; cancel ringing at 50Hz
                    M376 H4 ; bed compensation taper

                    ;tool offsets ; Positive Value of Z moves the head closer to the bed
                    G10 P0 X-9 Y39 Z-4.8 ; T0
                    G10 P1 X-9 Y39 Z-4.8 ; T1
                    G10 P2 X25.5 Y39 Z-5.6 ; T2
                    G10 P3 X-9 Y39 Z-5.6 ; T3

                    ;Heater PID
                    M307 H0 A341.8 C197.6 D4.1 S1.00 V24.2 B0 ; Set PID tune for Heated Bed
                    M307 H1 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H2 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H3 A718.8 C250.1 D3.3 S1.00 V24.4 B0 ;M307 H3 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H4 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H5 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H6 A200.0 C146.1 D3.0 S1.00 V24.3 B0
                    M307 H7 A200.0 C146.1 D3.0 S1.00 V24.3 B0

                    ;deselect tools
                    T-1

                    ;M572 D0 S0.2 ; pressure advance T0
                    ;M572 D1 S0.2 ; pressure advance T1
                    ;M572 D2 S0.2 ; pressure advance T2
                    ;M572 D3 S0.2 ; pressure advance T3

                    ; homeall.g
                    ; called to home all axes

                    M98 Phomec.g ; Home C (ToolHead)

                    M98 Phomey.g ; Home Y

                    M98 Phomex.g ; Home X

                    M98 Phomez.g ; Home Z

                    G1 X150 Y-49 F15000 ; Park

                    ; homez.g
                    ; called to home the Z axis

                    M98 P/macros/Coupler - Unlock ;Open Coupler

                    G29 S2

                    G91 ; Relative mode
                    G1 S2 Z5 F5000 ; Lower the bed
                    G90 ; back to absolute positioning

                    G1 X150 Y100 F50000 ; Position the endstop above the bed centre

                    G91 ; Relative mode

                    G4 P500 ; wait 500msec
                    G1 Z-300 S1 F1000 ; Move Z down until the switch triggers (first pass)

                    G4 P500 ; wait 500msec
                    G1 Z5 F5000 ; Lift Z

                    G4 P500 ; wait 500msec
                    ;G1 Z-300 S1 F300 ; Move Z down until the switch triggers (second pass)
                    G30

                    G4 P500 ; wait 500msec
                    G1 Z5 F5000 ; Drop the Bed

                    G90 ; Back to absolute positioning

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                    • CTRDevelopmentsundefined
                      CTRDevelopments
                      last edited by

                      @CTRDevelopments said in Mesh Bed Leveling Not moving bed:

                      M376 H4 ; bed compensation taper

                      aha, it seems to work if I comment out this line. Not sure why though?

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