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Probing issues

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  • undefined
    medicusdkfz
    last edited by medicusdkfz 17 Jan 2021, 20:51

    Sorry, that is exactly what I have done (line 32 in my mesh.g)... And than I get this warning!

    But thank you for your help!

    undefined 1 Reply Last reply 17 Jan 2021, 21:01 Reply Quote 0
    • undefined
      fcwilt @medicusdkfz
      last edited by fcwilt 17 Jan 2021, 21:01

      @medicusdkfz said in Probing issues:

      Sorry, that is exactly what I have done (line 32 in my mesh.g)... And than I get this warning!

      I cannot find where you execute G30 after leveling the gantry but before creating the height map.

      In the bed.g file I see where you execute G28 Z but in the homez.g file I see that you are homing to an end stop switch but I don't see G30.

      Frederick

      Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

      1 Reply Last reply Reply Quote 0
      • undefined
        medicusdkfz
        last edited by 17 Jan 2021, 21:34

        In my mesh macro you will find in line 15 a G32 command and after that before the G29 S0 the G30...

        undefined 1 Reply Last reply 17 Jan 2021, 21:39 Reply Quote 0
        • undefined
          fcwilt @medicusdkfz
          last edited by 17 Jan 2021, 21:39

          @medicusdkfz said in Probing issues:

          In my mesh macro you will find in line 15 a G32 command and after that before the G29 S0 the G30...

          Yes I see that but you also have to do a G30 BEFORE creating the height map as well as before loading a height map.

          Also remember that you don't need to load the height map after just creating it - the height map remains loaded after creation until something else unloads it.

          Frederick

          Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

          1 Reply Last reply Reply Quote 0
          • undefined
            medicusdkfz
            last edited by medicusdkfz 18 Jan 2021, 07:07

            I have done all this, but this doesn't explain the warning... I go a step further and perform with every print a mesh. I know, that's an overkill, but I suppose, that the thermal expansion is not consistent. But again: I don't understand the warning...

            @medicusdkfz said in Probing issues:

            ... and now I get the error again and again: "Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh."
            To fix the mesh bed levelling is getting me me mad...

            The papertest with G28 Z (z microswitch) is ok!

            1 Reply Last reply Reply Quote 0
            • undefined
              medicusdkfz
              last edited by 18 Jan 2021, 14:29

              Is there any perspective of help here? If it has a professional service, I would also pay for it... The issue is important to me and I would like to get it solved!

              undefined undefined 2 Replies Last reply 18 Jan 2021, 14:34 Reply Quote 0
              • undefined
                fcwilt @medicusdkfz
                last edited by 18 Jan 2021, 14:34

                @medicusdkfz said in Probing issues:

                Is there any perspective of help here? If it has a professional service, I would also pay for it... The issue is important to me and I would like to get it solved!

                Can you show us where you perform the G30 before creating the height map?

                Frederick

                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                1 Reply Last reply Reply Quote 0
                • undefined
                  jay_s_uk @medicusdkfz
                  last edited by 18 Jan 2021, 14:35

                  @medicusdkfz shall we start a fresh?
                  Post your latest files.
                  Your original comments around the value not always showing in DWC when probing, the DWC doesn't update quick enough to show the change in value, but don't worry, its being recorded at the correct trigger height

                  Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                  1 Reply Last reply Reply Quote 0
                  • undefined
                    medicusdkfz
                    last edited by 18 Jan 2021, 16:02

                    Ok, thank you for your help... I will deliver this evening the necessary information.

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      medicusdkfz
                      last edited by 18 Jan 2021, 17:43

                      Here are my actual files...

                      mesh.g:

                      ; give one last chance to cancel...
                      M291 P"This will replace the existing bed mesh. Are you sure?" R"Bed Mesh" S3
                      ; Level the gantry so we can park the carriage in the middle of the bed
                      G32
                      M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                      ; Heat the bed to 100C
                      M291 P"Heating up the bed..." R"Probing New Bed Mesh" T5
                      M190 S110
                      ; Set the hotend to 260C
                      M291 P"Heating up the hotend..." R"Bed Mesh" T5
                      G10 P0 S260
                      M116
                      ; Level the gantry again while everything is hot
                      M291 P"QGL while everything is hot..." R"Bed Mesh" T5
                      G32
                      ; ignore current heightmap
                      ;M561 ; already done in G32 (bed.g)
                      M98 P"/macros/print_scripts/do_nozzle_wipe.g"
                      M98 P"/macros/print_scripts/do_nozzle_wipe.g"
                      ; Get the reference Z offset
                      M291 P"Get reference Z offset..." R"Bed Mesh" T5
                      G28 Z ; first home z again before G30
                      ; Probe a new bed mesh!
                      M291 P"Probing now!" R"Bed Mesh" T5
                      ;M98 P"/macros/Mesh/mesh_420_points.g"
                      ;M98 P"/macros/Mesh/mesh_121_points.g"
                      ;M98 P"/macros/Mesh/mesh_81_points.g"
                      M98 P"/macros/Mesh/mesh_49_points.g"
                      ;M98 P"/macros/Mesh/mesh_36_points.g"
                      ;M98 P"/macros/Mesh/mesh_25_points.g"
                      ;M98 P"/macros/Mesh/mesh_16_points.g"
                      M98 P"/macros/print_scripts/goto_bed_center_probe.g" ; Probe is above center of the bed
                      G1 Z5
                      G30
                      G1 Z5
                      G29 S0 ; create new mesh with xx points (uncomment one entry line 34 to 40)
                      ; Done, move to center
                      M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                      ;M291 P"Deactivate actual mesh?" R"Bed Mesh" S3
                      ;G29 S2

                      config.g:

                      ; Configuration file for Duet 3 (firmware version 3)
                      ; 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
                      M564 S1 H1 ; Forbid axis movements when not homed
                      ; Network
                      M552 P10.0.0.2 S1 ; enable network and acquire dynamic address via DHCP
                      M554 P10.0.0.1 ; gateway
                      M553 P255.255.255.0 ; subnet mask
                      M586 P0 S1 ; enable HTTP
                      M586 P1 S1 ; enable FTP (for remote backups)
                      M586 P2 S0 ; disable Telnet
                      ; General setup
                      M669 K1 ; Select CoreXY mode (2.03 and up)
                      M550 PVoron 2.4 350mm^3 ; set printer name
                      ; Drives for XY
                      M569 P0.4 S1 ; A motor (X)
                      M569 P0.5 S0 ; B motor (Y)
                      ; Drives for Z
                      M569 P0.0 S1 ; Front left
                      M569 P0.1 S0 ; Back left
                      M569 P0.2 S1 ; Back right
                      M569 P0.3 S0 ; Front right
                      ; Drive for extruder
                      M569 P1.0 S1 ; physical drive 1.0 goes forwards
                      ; Motor mapping and steps per mm
                      M584 X0.4 Y0.5 Z0.0:0.1:0.2:0.3 E1.0 ; set drive mapping
                      M350 X16 Y16 Z16 E16 I1 ; Use 1/16 microstepping with interpolation everywhere
                      M92 X160 Y160 Z800 ; Set XYZ steps per mm (0.9deg motors)
                      M92 E410 ; Set Extruder steps per mm
                      ; Drive currents
                      M906 X1200 Y1200 Z1200 E1000 ; XYZ and E current
                      M906 I30 ; Idle current percentage
                      M84 S120 ; Idle timeout
                      ; Accelerations and speed
                      M98 P"/macros/print_scripts/speed_printing.g"
                      ; Axis travel limits
                      M208 X0 Y1 Z-2 S1 ; set axis minima
                      M208 X346 Y355 Z320 S0 ; set axis maxima
                      ; Endstops
                      M574 X2 S1 P"!io1.in" ; X Hall effect endstop
                      M574 Y2 S1 P"!io2.in" ; Y Hall effect endstop
                      ;M574 Z0 P"nil" ; no Z endstop ## fulg ##
                      M574 Z1 S1 P"io3.in" ; Z microswitch endstop
                      ; Z-Probe
                      ;M558 K0 P9 C"io4.in" H4 F70 R0.2 T12000 A5 B0 ; BLtouch
                      ;M950 S0 C"io4.out" ; servo BLtouch
                      ;G31 X0 Y23 Z2.600 P25
                      M558 K0 P5 C"io4.in" H3 F150 T18000 A5 S0.01 ; set Z probe type to switch and the dive height + speeds (S-1 -> nimmt die Anzahl des A-Parameters zum Testen), B1 (schaltet heaters aus)
                      G31 P500 X0 Y25 Z0.845 ; (0.845 hot, black PEI-sheet) set Z probe trigger value, inductive probe offset and trigger height (Papiertest, G92 Z0 setzen und anschliessend G30 S-1/G1 Z5 mehrfach wiederholen -> Höhe = Offset
                      ;M558 K1 P8 C"io3.in" T18000 F50 H2 A5 S-1 R0.2 ; ## fulg ##
                      ;G31 K1 P500 X0 Y0 Z-0.700 ; ## fulg ## Z switch offset (if positive, greater value = lower nozzle. if negative, more negative = higher nozzle)
                      M671 X-62:-62:407.5:407.5 Y-1:429:429:-1 S20 ; Define Z belts locations (Front_Left, Back_Left, Back_Right, Front_Right)
                      M557 X10:340 Y30:320 S33:29 ; Anfahrtpunkte für Sonde!!! define mesh grid (for G29) - overwrite mesh settings in DOW after restart
                      ; Hotbed (dual thermistor setup)
                      M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Keenovo" ; configure sensor 0 as thermistor on pin temp0 (heater sensor)
                      M308 S2 P"temp2" Y"thermistor" T100000 B3950 A"Heizbett direkt" ; configure sensor 2 as thermistor on pin temp2
                      M950 H0 C"out0" T2 Q10 ; Heater --> SSD-Steuerung
                      M307 H0 A261.9 C549.2 D0.7 V24.0 B0 ; Heater 0 model: gain 261.9, time constant 549.2, dead time 0.7, max PWM 1.00, calibration voltage 24.0, mode PID
                      M140 P0 H0 ; Map heated bed to heater 0 - Keenovo 220V, 750W
                      M143 H0 P1 T0 A2 S130 C0 ; Regulate (A2) bed heater (H0) to have pad sensor (T0) below 115°C. Use Heater monitor 1 for it
                      M143 H0 P2 T0 A1 S135 C0 ; Shut off (A1) bed heater (H0) if pad sensor (T0) exceeds 125°C. Use Heater monitor 2 for it
                      M143 H0 S120 ; Set bed heater max temperature to 120°C, use implict monitor 0 which is implicitly configured for heater fault
                      M307 H0 B1 S0.6 ; Enable Bang Bang mode and set PWM to 60% to avoid warping
                      ; Hotend
                      M308 S1 P"temp1" Y"thermistor" T500000 B4723 C1.196220e-7 A"Mosquito" H-6 ; Thermistor H-Wert eicht die Temp R3950
                      M950 H1 C"out1" T1 ; Heater
                      M307 H1 A593.7 C180.4 D7.6 V24.0 B0 ; Heater 1 model: gain 593.7, time constant 180.4, dead time 7.6, max PWM 1.00, calibration voltage 24.0, mode PID
                      M143 H1 S350 ; Sets temperature limit for extruder - Mosquito
                      ; DHT22 sensor
                      ;M308 S10 P"0.spi.cs0" Y"dht22" A"Chamber Temp" ; Temperature (connected to cs0 port on the temp daughterboard slot
                      ;M308 S11 P"S10.1" Y"dhthumidity" A"Chamber Hum[%]" ; Humidity
                      ; MCU sensors
                      M308 S3 Y"mcu-temp" A"MCU"
                      ; Main fans
                      M950 F0 C"1.out6" Q500 ; Part cooling fan
                      M106 P0 S0 B0.1 H-1 ; Default off; booststart for 0.1s (B0.1); thermostatic control off
                      M950 F1 C"out7" Q500 ; Hotend cooling fan
                      M106 P1 S255 H1 T50 ; Default on; thermistatic control on above 50C
                      ; Aux fans (option to control daughter board fans based on main board temp sensor coming in RRF3.3, for now has to be manual)
                      M950 F2 C"1.out7" Q500 ; Electronics compartment fan 1
                      M106 P2 S1.0 H-1 ; Default on; thermostatic control off
                      M950 F3 C"1.out8" Q500 ; Electronics compartment fan 2
                      M106 P3 S1.0 H-1 ; Default on; thermostatic control off
                      M950 F6 C"out8" Q500 ; Noctua exhaust filter fan
                      M106 P6 S0 H-1 ; Default off
                      ; LED-Stripes
                      ;M950 F5 C"out9" Q500 ; LED-Streifen rechts --> derzeit nicht installiert
                      ;M106 P5 S1.0 H-1 ; Default on; thermostatic control off
                      ; Misc
                      M912 P0 S-4 ; MCU temperature calibration (yours will be different)
                      M575 P1 S1 B115200 ; enable support for PanelDue
                      ; Tools
                      M563 P0 D0 H1 F0 ; Define tool 0 using fan 0 for M106
                      G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
                      G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
                      ; DAA tuning (you will need to change this for your slicer)
                      M80 ; turn on PSU & mains voltage
                      M501 ; load config-override.g
                      T0 ; select tool 0
                      ; workaround for bug in 3.2beta3, M143 needs to be done after all M950, M307, M140 and M141. https://forum.duet3d.com/topic/19031/m143-issue/25?_=1605986986974
                      M143 H0 S115
                      M143 H1 S350

                      bed.g:

                      ; bed.g
                      ; Called to align the gantry to the bed plane via G32
                      ; Clear any bed transform
                      M561
                      ; Turn off noisy Extruder motor
                      M84 E
                      ; Home all axes
                      if !move.axes[0].homed || !move.axes[1].homed
                      echo "Printer was not homed. Homing now."
                      G28
                      ; Lower currents, speed & accel
                      M98 P"/macros/print_scripts/speed_probing.g"
                      M98 P"/macros/print_scripts/xy_current_low.g"
                      ; Probe the bed at 4 points multiple times
                      while true
                      if iterations = 7
                      abort "Too many auto calibration attempts"
                      G30 P0 X10 Y28 Z-99999 ; probe near front left belt
                      if result != 0
                      continue
                      G30 P1 X10 Y315 Z-99999 ; probe near back left belt
                      if result != 0
                      continue
                      G30 P2 X340 Y315 Z-99999 ; probe near back right belt
                      if result != 0
                      continue
                      G30 P3 X340 Y28 Z-99999 S4 ; probe near front right belt
                      if result != 0
                      continue
                      if move.calibration.initial.deviation <= 0.007
                      break
                      ; If there were too many errors or the deviation is too high - abort and notify user
                      echo "Repeating calibration because deviation is too high (" ^ move.calibration.initial.deviation ^ "mm)"
                      ; end loop
                      echo "Auto calibration successful, deviation", move.calibration.initial.deviation ^ "mm"
                      ; Restore high currents, speed & accel
                      M98 P"/macros/print_scripts/speed_printing.g"
                      M98 P"/macros/print_scripts/xy_current_high.g"
                      G28 Z
                      M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                      G1 Z5

                      homez.g:

                      ; homez.g
                      ; called to home the Z axis
                      ; do nothing if XY is not homed yet
                      if move.axes[0].homed && move.axes[1].homed
                      G91 ; relative positioning
                      G1 H2 Z10 F6000 ; lift Z relative to current position
                      G90 ; absolute positioning
                      M98 P"/macros/print_scripts/speed_probing.g"; Setup low speed & accel
                      ; Home Z microswitch
                      M98 P"/macros/print_scripts/goto_z_switch.g"
                      G1 H1 Z-600 F360 ; move Z down until the endstop is triggered
                      G1 Z4 F1800 ; go back a few mm
                      G1 H1 Z-600 F80 ; move slowly to Z axis endstop once more (second pass)
                      G92 Z-0.50
                      G1 Z10
                      M98 P"/macros/print_scripts/speed_printing.g"; Restore normal speed & accel
                      M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"

                      homeall.g:

                      ; homeall.g
                      ; called to home all axes
                      ; Relative positioning
                      G91
                      ; Lower currents, speed & accel
                      M98 P"/macros/print_scripts/xy_current_low.g"
                      M98 P"/macros/print_scripts/speed_probing.g"
                      ; Lift Z relative to current position if needed
                      if !move.axes[2].homed
                      G1 Z10 F9000 H1
                      elif move.axes[2].userPosition < 10
                      G1 Z10 F9000
                      ; Coarse home X or Y
                      G1 X600 Y600 F2400 H1
                      ; Coarse home X
                      G1 X600 H1
                      ; Coarse home Y
                      G1 Y600 H1
                      ; Move away from the endstops
                      G1 X-5 Y-5 F9000
                      ; Fine home X
                      G1 X600 F360 H1
                      ; Fine home Y
                      G1 Y600 H1
                      ; Absolute positioning
                      G90
                      ; Home Z microswitch
                      M98 P"/macros/print_scripts/goto_z_switch.g"
                      G1 H1 Z-600 F360 ; move Z down until the endstop is triggered
                      G1 Z4 F1800 ; go back a few mm
                      G1 H1 Z-600 F80 ; move slowly to Z axis endstop once more (second pass)
                      G92 Z-0.50
                      G1 Z10
                      ; Restore high currents, speed & accel
                      M98 P"/macros/print_scripts/xy_current_high.g"
                      M98 P"/macros/print_scripts/speed_printing.g"
                      1 Reply Last reply Reply Quote 0
                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by 18 Jan 2021, 20:22

                        The main problem I see is that your homeall and homez are using the endstop switch for homing Z and you're using them to home Z in your bed.g for the leveling. Every time you call G28 or G28 Z you are using the endstop instead of the probe to set Z0.

                        In your bed.g add a single G30 before and after the 4 point leveling routine. You can still home with G28 at the start, but you need a G30 before the leveling passes. And then after those instead of using G28 Z, use a G30 at the center of the bed instead.

                        Then in your mesh.g don't use G28 Z at all after you've used G32. It's not needed. Once the leveling routine has been done, do not use G28 or G28 Z.

                        Z-Bot CoreXY Build | Thingiverse Profile

                        undefined 1 Reply Last reply 18 Jan 2021, 20:36 Reply Quote 0
                        • undefined
                          medicusdkfz @Phaedrux
                          last edited by medicusdkfz 18 Jan 2021, 20:36

                          @Phaedrux G30 always with inductive probe in bed center? Thank you!!! That's a valuable hint. I'll try this and I'll get back to you with more information...

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            medicusdkfz
                            last edited by 19 Jan 2021, 06:06

                            This ist my actual 420 points mesh:
                            Bildschirmfoto 2021-01-19 um 06.58.25.png

                            I modified my homez.g and homeall.g and abandoned my z-microswitch...

                            homez.g:

                            ; homez.g
                            ; called to home the Z axis
                            ; do nothing if XY is not homed yet
                            if move.axes[0].homed && move.axes[1].homed
                            G91 ; relative positioning
                            G1 H2 Z10 F6000 ; lift Z relative to current position
                            G90 ; absolute positioning
                            M98 P"/macros/print_scripts/speed_probing.g"; Setup low speed & accel
                            ; Home Z inductive probe
                            M98 P"/macros/print_scripts/goto_bed_center_probe.g"
                            G30 Z-9999
                            G1 Z5
                            M98 P"/macros/print_scripts/speed_printing.g"; Restore normal speed & accel
                            M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"

                            bed.g:

                            ; bed.g
                            ; Called to align the gantry to the bed plane via G32
                            ; Clear any bed transform
                            M561
                            ; Turn off noisy Extruder motor
                            M84 E
                            ; Home all axes
                            if !move.axes[0].homed || !move.axes[1].homed
                            echo "Printer was not homed. Homing now."
                            G28
                            ; Lower currents, speed & accel
                            M98 P"/macros/print_scripts/speed_probing.g"
                            M98 P"/macros/print_scripts/xy_current_low.g"
                            M98 P"/macros/print_scripts/goto_bed_center_probe.g"
                            G30
                            G1 Z5
                            M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                            ; Probe the bed at 4 points multiple times
                            while true
                            if iterations = 7
                            abort "Too many auto calibration attempts"
                            G30 P0 X10 Y28 Z-99999 ; probe near front left belt
                            if result != 0
                            continue
                            G30 P1 X10 Y315 Z-99999 ; probe near back left belt
                            if result != 0
                            continue
                            G30 P2 X340 Y315 Z-99999 ; probe near back right belt
                            if result != 0
                            continue
                            G30 P3 X340 Y28 Z-99999 S4 ; probe near front right belt
                            if result != 0
                            continue
                            if move.calibration.initial.deviation <= 0.007
                            break
                            ; If there were too many errors or the deviation is too high - abort and notify user
                            echo "Repeating calibration because deviation is too high (" ^ move.calibration.initial.deviation ^ "mm)"
                            ; end loop
                            echo "Auto calibration successful, deviation", move.calibration.initial.deviation ^ "mm"
                            ; Restore high currents, speed & accel
                            M98 P"/macros/print_scripts/speed_printing.g"
                            M98 P"/macros/print_scripts/xy_current_high.g"
                            M98 P"/macros/print_scripts/goto_bed_center_probe.g"
                            G28 Z ; G30 Z-9999
                            M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"

                            mesh.g:

                            ; give one last chance to cancel...
                            M291 P"This will replace the existing bed mesh. Are you sure?" R"Bed Mesh" S3
                            ; Heat the bed to 100C
                            M291 P"Heating up the bed..." R"Probing New Bed Mesh" T5
                            M190 S110
                            ; Set the hotend to 260C
                            M291 P"Heating up the hotend..." R"Bed Mesh" T5
                            G10 P0 S260
                            M116
                            ; Level the gantry again while everything is hot
                            M291 P"QGL while everything is hot..." R"Bed Mesh" T5
                            G32
                            ; ignore current heightmap
                            ;M561 ; already done in G32 (bed.g)
                            M98 P"/macros/print_scripts/do_nozzle_wipe.g"
                            M98 P"/macros/print_scripts/do_nozzle_wipe.g"
                            ; Get the reference Z offset
                            M291 P"Get reference Z offset..." R"Bed Mesh" T5
                            ; Probe a new bed mesh!
                            M291 P"Probing now!" R"Bed Mesh" T5
                            M98 P"/macros/Mesh/mesh_420_points.g"
                            ;M98 P"/macros/Mesh/mesh_121_points.g"
                            ;M98 P"/macros/Mesh/mesh_81_points.g"
                            ;M98 P"/macros/Mesh/mesh_49_points.g"
                            ;M98 P"/macros/Mesh/mesh_36_points.g"
                            ;M98 P"/macros/Mesh/mesh_25_points.g"
                            ;M98 P"/macros/Mesh/mesh_16_points.g"
                            M98 P"/macros/print_scripts/goto_bed_center_probe.g"
                            G30
                            G1 Z5
                            M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                            G29 S0 ; create new mesh with xx points (uncomment one entry line 34 to 40)
                            ; Done, move to center
                            M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"

                            But I get the warning from a substantial z-offset again... The bed center is at the right height in the mesh.

                            1 Reply Last reply Reply Quote 0
                            • Phaedruxundefined
                              Phaedrux Moderator
                              last edited by 19 Jan 2021, 06:13

                              At what point do you get the warning about the offset?

                              What is your bed center point that you are probing? It's odd that there is a negative dip in the center. If that's where you are probing, that should be 0.

                              Z-Bot CoreXY Build | Thingiverse Profile

                              undefined 1 Reply Last reply 19 Jan 2021, 07:10 Reply Quote 0
                              • undefined
                                fcwilt
                                last edited by 19 Jan 2021, 06:29

                                Hi,

                                In homez.g you have G30 Z-9999. That Z parameter may be causing problems.

                                In mesh.g you create the height map which leaves it "loaded" and then you issue G29 S0 to load it again.

                                I find the structure of your files rather confusing.

                                JOOC why do you change the speed, acceleration, currents?

                                Thanks.

                                Frederick

                                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                                undefined 1 Reply Last reply 19 Jan 2021, 07:19 Reply Quote 0
                                • undefined
                                  medicusdkfz @Phaedrux
                                  last edited by medicusdkfz 19 Jan 2021, 07:10

                                  @Phaedrux I suppose, that the bed center is not the deepest point of the bed. I probe in the center of the bed. I get the warning at the end of G29 S0... Sometimes I wish, I have a gcode-log...

                                  1 Reply Last reply Reply Quote 0
                                  • undefined
                                    medicusdkfz @fcwilt
                                    last edited by medicusdkfz 19 Jan 2021, 07:19

                                    @fcwilt This is the phase of testing. I don't want to create a 420-point mesh with every print. Therefore I activate the actual one before printing. And I have to use mbl because my thermal warping is so big... Some Voron users struggle with RRF mbl too and don't use that feature. Duet hardware is not the standard with Voron 2.4. Most of the users >90% use SKR hardware with Klipper...

                                    At some point, I have to set z=0. This is with G28 Z... Am I wrong? With my Voron I have two possibilities to set z=0 - with the microswitch or the inductive probe. To reduce problems with mesh bed levelling, I use right now the inductive sensor. It is accurate enough. But how is the best way, to zero my z-axis? G30 Z-9999 or G30 without any param?

                                    undefined 1 Reply Last reply 19 Jan 2021, 10:18 Reply Quote 0
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                                      fcwilt @medicusdkfz
                                      last edited by fcwilt 19 Jan 2021, 10:18

                                      @medicusdkfz said in Probing issues:

                                      But how is the best way, to zero my z-axis? G30 Z-9999 or G30 without any param?

                                      If you read the docs G30 Z-9999 is not valid.

                                      As I mentioned I don't know if that is causing any problem - perhaps the Z-9999 is just ignored.

                                      The only time you use a parameter of Z-9999 is when you have a P# parameter.

                                      So just use G30 - I know that works.

                                      Frederick

                                      Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

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                                        medicusdkfz
                                        last edited by medicusdkfz 19 Jan 2021, 18:47

                                        THANK YOU! I changed G30 Z-9999 to G30 and now it's working. First layer looks good and consistent - even at bigger areas. No need of a microswitch. The SuperPINDA is highly accurate. But I had to reduce my poll rate:

                                        M558 K0 P5 C"io4.in" H5 F80 T18000 A5 S0.01 ; set Z probe type to switch and the dive height + speeds (S-1 -> nimmt die Anzahl des A-Parameters zum Testen), B1 (schaltet heaters aus)
                                        G31 P500 X0 Y25 Z0.575 ; (0.475 mm hot, black PEI-sheet) set Z probe trigger value, inductive probe offset and trigger height (Papiertest, G92 Z0 setzen und anschliessend G30 S-1/G1 Z5 mehrfach wiederholen -> Höhe = Offset
                                        ; wenn die korrigierten Z-Babysteps positiv sind (z.B. 0.080 mm), dann werden sie vom Z-Parameter unter G31 aufsummiert!

                                        For the sake of completeness:

                                        homez.g:

                                        ; homez.g
                                        ; called to home the Z axis
                                        ; do nothing if XY is not homed yet
                                        if move.axes[0].homed && move.axes[1].homed
                                        G91 ; relative positioning
                                        G1 H2 Z10 F6000 ; lift Z relative to current position
                                        G90 ; absolute positioning
                                        M98 P"/macros/print_scripts/speed_probing.g"; Setup low speed & accel
                                        ; Home Z microswitch
                                        ;M98 P"/macros/print_scripts/goto_z_switch.g"
                                        ;G1 H1 Z-600 F360 ; move Z down until the endstop is triggered
                                        ;G1 Z4 F1800 ; go back a few mm
                                        ;G1 H1 Z-600 F80 ; move slowly to Z axis endstop once more (second pass)
                                        ;G92 Z-0.70
                                        ;G1 Z10
                                        ;M98 P"/macros/print_scripts/speed_printing.g"; Restore normal speed & accel
                                        ;M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
                                        ; Home Z inductive probe
                                        M98 P"/macros/print_scripts/goto_bed_center_probe.g"
                                        G30
                                        G1 Z5
                                        M98 P"/macros/print_scripts/speed_printing.g"; Restore normal speed & accel
                                        M98 P"/macros/print_scripts/goto_bed_center_nozzle.g"
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