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    Z probing offset

    Tuning and tweaking
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    • Donpi
      Donpi last edited by

      Hi everyboy,

      It' seems that the G29 command does'nt care about the X and Y offset I setted with the command G31.

      The probing process move the nozzle at the coordinate instead of the prob.

      Here is a part of my config.g:

      ; Z-Probe
      M307 H3 A-1 C-1 D-1                            ; Disable heater on PWM channel for BLTouch
      M558 P9 H5 F100 T6000                          ; Set Z probe type to bltouch and the dive height + speeds
      G31 P500 X0 Y79.3 Z1.72                        ; Set Z probe trigger value, offset and trigger height
      M557 X20:280 Y20:280 S20                       ; Define mesh grid
      

      Ana here is my Bed.g:

      M561 ; clear any bed transform
      G29  ; probe the bed and enable compensation
      

      My bed is 300 * 300 and every point over Y 220 is not probed.

      Anynody can help ?

      Bye
      Juan

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      • jens55
        jens55 last edited by

        You have defined a y offset of 79.3 mm. The probe can't physically reach 300 mm.
        With the offset being positive, I would expect the probing to start at y=100 (offset of 80 and 20 offset as per your probing setup on M557) but I am not certain here.

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        • aidar
          aidar last edited by

          Your mesh grid is defined as up to 280. Now, when Y220 work fine, your next probing point on Y axis are 220 + 20 (S parameter in M557) + 79.3 (probe offset) = 319.3 . So your probe just cant reach that, your bed is 300.
          If it can, i mean if it is over bed when you are at Y300, then your probe offset is with wrong sign.

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          • Donpi
            Donpi last edited by

            To more clear,

            when the nozzle is at 300 the prob is at 379.3 that is outside of the print area.

            Now for example : when I prob 150:150, i'm expect the prob at 150:150 and the nozzle at 150:70.7

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            • jens55
              jens55 last edited by

              Shouldn't that read "when I probe at 150:150 the nozzle will be at 150:229.3" ?

              Donpi 1 Reply Last reply Reply Quote 0
              • Donpi
                Donpi @jens55 last edited by

                @jens55 said in Z probing offset:

                Shouldn't that read "when I probe at 150:150 the nozzle will be at 150:229.3" ?

                Nop,

                I juste trie to put -79.3 to the y offset and it "compensate" twice the offset.

                I'am doing something wrong but can't find what is it...

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                • aidar
                  aidar last edited by

                  Please post your config.g file

                  Donpi 1 Reply Last reply Reply Quote 0
                  • Donpi
                    Donpi @aidar last edited by

                    @aidar Ok here is my entire config.g

                    ; Configuration file for Duet WiFi (firmware version 1.21)
                    ; executed by the firmware on start-up
                    ;
                    ; generated by RepRapFirmware Configuration Tool v2 on Wed Jul 10 2019 22:12:37 GMT+0200 (heure d’été d’Europe centrale)
                    
                    ; General preferences
                    G90                                            ; Send absolute coordinates...
                    M83                                            ; ...but relative extruder moves
                    
                    M669 K1                                        ; Select CoreXY mode
                    
                    ; Network
                    M550 P"Hyper Cube La Muerte"                   ; Set machine name
                    M552 S1                                        ; Enable network
                    M587 S"HUIT-FILLES" P"Muahahaha" ; Configure access point. You can delete this line once connected
                    M586 P0 S1                                     ; Enable HTTP
                    M586 P1 S0                                     ; Disable FTP
                    M586 P2 S0                                     ; Disable Telnet
                    
                    ; Drives
                    M569 P0 S0                                     ; Physical drive 0 goes forwards
                    M569 P1 S0                                     ; Physical drive 1 goes forwards
                    M569 P2 S0				       ; Physical drive 2 goes forwards
                    M569 P3 S0                                     ; Physical drive 3 goes forwards
                    M350 X256 Y256 Z256 E256 I0                    ; Configure microstepping without interpolation
                    M92 X1280.00 Y1280.00 Z6400.00 E13395.20      ; Set steps per mm
                    ;M566 X900.00 Y900.00 Z12.00 E120.00            ; Set maximum instantaneous speed changes (mm/min)
                    M566 X1000.00 Y1000.00 Z50.00 E120.00            ; Set maximum instantaneous speed changes (mm/min)
                    M203 X6000.00 Y6000.00 Z500.00 E3000.00        ; Set maximum speeds (mm/min)
                    ;M201 X750.00 Y750.00 Z20.00 E250.00            ; Set accelerations (mm/s^2)
                    M201 X1000.00 Y1000.00 Z100.00 E250.00            ; Set accelerations (mm/s^2)
                    M906 X800.00 Y800.00 Z1200.00 E800.00 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 X300 Y300 Z300 S0                         ; Set axis maxima
                    
                    ; Endstops
                    M574 X1 Y1 S3                               ; Set endstops controlled by motor load detection
                    M574 Z1 S2
                    M915 X Y S7 R1
                    
                    ; Z-Probe
                    M307 H3 A-1 C-1 D-1                            ; Disable heater on PWM channel for BLTouch
                    M558 P9 H5 F100 T6000                          ; Set Z probe type to bltouch and the dive height + speeds
                    G31 P500 X0 Y79.3 Z1.28;Z1.72                        ; Set Z probe trigger value, offset and trigger height
                    M557 X20:280 Y20:280 S20                       ; Define mesh grid
                    
                    ; Heaters
                    M307 H0 B0 S1.00                               ; Disable bang-bang mode for the bed heater and set PWM limit
                    M305 P0 T100000 B3950 R4700                    ; Set thermistor + ADC parameters for heater 0
                    M143 H0 S150                                   ; Set temperature limit for heater 0 to 150C
                    
                    M305 P1 T100000 B4725 C7.060000e-8             ; Set thermistor + ADC parameters for heater 1
                    M143 H1 S280                                   ; Set temperature limit for heater 1 to 280C
                    
                    ; Fans
                    ;M106 P0 S0 I0 F500 H T45                       ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
                    ;M106 P1 S1 I0 F500 H1 T45                      ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
                    M106 P1 S0 I0 F500 H-1
                    M106 P2 T45:65 H100:101:102
                    
                    ; Tools
                    M563 P0 D0 H1 F1                                  ; 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
                    M572 D0 S0.25 ;S0.15
                    
                    ; Automatic saving after power loss is not enabled
                    
                    ; Custom settings are not configured
                    
                    ; Miscellaneous
                    M501                                           ; Load saved parameters from non-volatile memory
                    
                    
                    
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                    • Donpi
                      Donpi last edited by

                      Just in case
                      21a90b72-7a88-496f-a32c-4fef514784f3-image.png

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                      • aidar
                        aidar last edited by aidar

                        Something is wrong with your coordinate system. If you probe offset is really Y almost 80, then you should be able to probe Y up to 300 easy, however you can not probe Y less then 80.
                        In your case you have opposite problem, so either your probe offset is with wrong sign, or your Y + and - are swapped.

                        I also reccomend to update firmware to latest 2 series, it is 2.05.1

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                        • Donpi
                          Donpi last edited by

                          100 % okay with min 80 and max 300 for the prob area ( at least I anderstand right )

                          It seams now it works fine again.
                          It like when I changed the config.g to test oposit sign, it reseted something.
                          Now it works well with my original +79.3

                          can the M501 at the end cause this behaviour ?

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                          • aidar
                            aidar last edited by

                            Depends what you have in your config-override.g file

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                            • Donpi
                              Donpi last edited by

                              only the pwm configuration

                              ; config-override.g file generated in response to M500 at 2019-07-13 14:44
                              ; This is a system-generated file - do not edit
                              ; Heater model parameters
                              M307 H0 A155.6 C454.0 D3.3 S1.00 V25.6 B0
                              M307 H1 A523.8 C225.8 D3.4 S1.00 V25.5 B0
                              M307 H2 A434.6 C193.2 D3.9 S1.00 V23.4 B0
                              M307 H4 A340.0 C140.0 D5.5 S1.00 V0.0 B0
                              M307 H5 A340.0 C140.0 D5.5 S1.00 V0.0 B0
                              M307 H6 A340.0 C140.0 D5.5 S1.00 V0.0 B0
                              M307 H7 A340.0 C140.0 D5.5 S1.00 V0.0 B0
                              G10 L2 P1 X0.00 Y0.00 Z0.00
                              G10 L2 P2 X0.00 Y0.00 Z0.00
                              G10 L2 P3 X0.00 Y0.00 Z0.00
                              G10 L2 P4 X0.00 Y0.00 Z0.00
                              G10 L2 P5 X0.00 Y0.00 Z0.00
                              G10 L2 P6 X0.00 Y0.00 Z0.00
                              G10 L2 P7 X0.00 Y0.00 Z0.00
                              G10 L2 P8 X0.00 Y0.00 Z0.00
                              G10 L2 P9 X0.00 Y0.00 Z0.00
                              
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                              • aidar
                                aidar last edited by

                                Looks ok, however i would delete all unused commands from there, or even better put used M307 commands ( i see you have 3 of them) in config.g and not to use config-override at all.

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