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    G32 Dual Z axis constant 0.6mm off-level difference

    Scheduled Pinned Locked Moved
    Tuning and tweaking
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    • rudenickundefined
      rudenick
      last edited by

      Full config.g

      ; General preferences
      G90                                            ; send absolute coordinates...
      M83                                            ; ...but relative extruder moves
      M550 P"Ender1"                                 ; set printer name
      
      ; Network
      ;M552 S0                                        ; disable network
      
      ; Drives
      M569 P0 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 0 goes backwards using TMC220x driver timings
      M569 P1 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 1 goes backwards using TMC220x driver timings
      M569 P2 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 2 goes forwards using TMC220x driver timings
      M569 P3 S0 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
      M569 P4 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
      ;M569 P0 S0                                     ; physical drive 0 goes forwards using default driver timings
      ;M569 P1 S0                                     ; physical drive 1 goes forwards using default driver timings
      ;M569 P2 S1                                     ; physical drive 2 goes forwards using default driver timings
      ;M569 P3 S0                                     ; physical drive 3 goes forwards using default driver timings
      
      M584 X0 Y1 Z2:4 E3                               ; set drive mapping
      M350 X16 Y16 Z16 E32 I1 					   ; configure microstepping with interpolation 
      M92 X80.00 Y80.00 Z400 E194.68                   ; set steps per mm 210.00 without m350
      M566 X1200.00 Y1200.00 Z24.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
      M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
      M201 X500.00 Y500.00 Z100.00 E5000.00            ; set accelerations (mm/s^2)
      M906 X800 Y800 Z800 E1000 I30                   ; set motor currents (mA)
      M572 D0 S0.42                                 ; set pressure advance for direct drive
      M84 S30                                        ; Set idle timeout
      
      ;dual z axis limits                             ;TO BE CORRECTED
      M671 X-30:260 Y115:115 S1                        ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
      ;M208 X45:195 Y30:185                            ; X carriage moves from -5 to 205, Y bed goes from 0 to 200
      
      ; Axis Limits
      M208 X0 Y0 Z0 S1                               ; set axis minima
      M208 X252 Y230 Z230 S0                         ; set axis maxima
      
      ; Endstops
      M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
      M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
      M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop
      
      ; Z-Probe PINDA
      M558 P5 C"probe" H3 F120 T6000 A20 S0.005     ; PINDA
      ;M308 S2 P"e1temp" A"PINDA" Y"thermistor" T100000 B3950 ; PINDA TEMP OK
      G31 P100 X-35 Y-4 ;Z0.540
      M557 Y20:220 X19:215 P9                        ; define mesh grid OK
      
      
      
      ; Heaters
      M140 H0                                        ; remap heated bed to heater 0
      M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp
      M950 H0 C"bed" T0                              ; create bed heater output on bed and map it toensor 0
      M143 H0 S110                                    ; set temperature limit for heater 0 to 150C
      M307 H0 A149.8 C505.7 D0.3 S1.0 V0.0 B0      ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H0 S90
      
      M308 S1 P"e0temp" Y"thermistor" T100000 B4092  ; configure sensor 1 as thermistor on pin e0temp
      M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
      M143 H1 S265                                   ; set temperature limit for heater 1 to 275C
      M307 H1 A348.1 C142.2 D5.1 S1.0 V0.0 B0        ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H1 S260
      
      
      ; Fans
      M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
      M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
      M950 F1 C"e1heat" Q500                         ; create fan 1 on pin e1heat and set its frequency
      M106 P1 H1 T40 S255                           ; set fan 1 value. Speed is set to 255. Thermostatic control is off
      
      
      
      
      ; Tools
      M563 P0 D0 H1 F0                               ; define tool 0
      ;G10 P0 X0 Y-13 Z-0.80                                ; set tool 0 axis offsets
      G10 P0 X0 Y-13 Z0                                ; set tool 0 axis offsets
      G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C
      
      ; Custom settings are not defined
      
      ; Miscellaneous
      T0                                             ; select first tool
      
      

      full homeall.g

      G91                     ; relative positioning
      G1 H2 Z5 F6000          ; lift Z relative to current position
      M190 S60           ; set temp to 60
      G1 H1 X-240 Y-240 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
      G1 H2 X5 Y5 F6000       ; go back a few mm
      G1 H1 X-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
      G1 H2 Z5 F6000          ; lift Z relative to current position
      G1 X160 Y115 F3000      ; put head over the centre of the bed, or wherever you want to probe
      G30 F240                ; lower head, stop when probe triggered and set Z to trigger height
      G90                     ; back to absolute mode
      G1 H2 X0 Y0 Z20 F6000   ; Go to home position
      G32
      G31 Z0.498 ;Z0.540
      ;G29 S1
      G28 Z
      

      full bed.g

      G30 P0 X20 Y115 Z-99999 ; probe near a leadscrew, half way along Y axis
      G30 P1 X190 Y115 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
      G28 Z
      
      
      G90 ; absolute mode
      G1 Z5
      G1 X40 Y115 F6000 ; put head over the mid left corner
      G1 Z0
      G91 ; relative mode
      G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
      G90 ; back to absolute mode
      G30 S-1; lower head, stop when probe triggered and report the value
      
      G90 ; absolute mode
      G1 Z5
      M564 S0
      G1 X250 Y115 F6000 ; put head over the mid right corner
      M564 S1
      G91 ; relative mode
      G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
      G90 ; back to absolute mode
      G30 S-1; lower head, stop when probe triggered and report the value
      
      
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      • rudenickundefined
        rudenick
        last edited by rudenick

        I also have a trouble with changing Z offset, one week it's 2mm lower and after few prints it goes 2mm up while I'm consistent with the procedure and it is persistent on restarts.

        Phaedruxundefined 1 Reply Last reply Reply Quote 0
        • rudenickundefined
          rudenick
          last edited by

          If at least I could home onice:

          25/09/2020, 07:54:49	G28
          Leadscrew adjustments made: 0.052 -0.048, points used 2, (mean, deviation) before (0.005, 0.029) after (0.000, 0.000)
          Stopped at height 0.590 mm
          Stopped at height 0.540 mm
          
          Error: Homing failed
          25/09/2020, 07:47:56	G28
          Leadscrew adjustments made: 0.096 -0.089, points used 2, (mean, deviation) before (0.010, 0.054) after (0.000, 0.000)
          Stopped at height 0.595 mm
          Stopped at height 0.515 mm
          
          Error: Homing failed
          25/09/2020, 07:45:14	G28
          Leadscrew adjustments made: 0.164 -0.158, points used 2, (mean, deviation) before (0.014, 0.094) after (0.000, 0.000)
          Stopped at height 0.647 mm
          Stopped at height 0.505 mm
          
          Error: Homing failed
          25/09/2020, 07:42:46	G28
          Leadscrew adjustments made: 0.379 -0.333, points used 2, (mean, deviation) before (0.048, 0.209) after (0.000, 0.000)
          Stopped at height 0.908 mm
          Stopped at height 0.675 mm
          
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          • Phaedruxundefined
            Phaedrux Moderator @rudenick
            last edited by

            @rudenick said in G32 Dual Z axis constant 0.6mm off-level difference:

            I also have a trouble with changing Z offset, one week it's 2mm lower and after few prints it goes 2mm up while I'm consistent with the procedure and it is persistent on restarts.

            Are the springs on your Ender3 bed really loose? Is the magnetic bed moving around a lot?

            Ah I see you are using the Pinda probe which I think it quite sensitive to temp changes. I see you also had the pinda temp sensor configured but is now commented out. Have you tried using the temp correction with it yet? I think this is probably your biggest problem for consistency.

            Z-Bot CoreXY Build | Thingiverse Profile

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            • rudenickundefined
              rudenick
              last edited by rudenick

              @Phaedrux I printed a 2cm washers in PCABS and replaced the springs with them. Magnetic bed holds to the bed.

              At first it worked but I started to have hardware/connection issues with temperature sensor in pinda probe. I never used temp corretion, I thought it is not available.

              I always use 60C temp for homing and printing unless I use PCABS but that's not in the equation/files right now.

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                You might find this thread interesting.

                https://forum.duet3d.com/topic/17383/polynomial-temp-compensation-for-probes?_=1601047729960

                I think it would be worthwhile to try out the temperature compensation again.

                https://duet3d.dozuki.com/Wiki/Gcode#Section_G31_Set_or_Report_Current_Probe_status

                Z-Bot CoreXY Build | Thingiverse Profile

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                • rudenickundefined
                  rudenick
                  last edited by

                  Yes but as I use 60C always - It's safe dependable value. Using temperature offsets would just add another fail point and would not impact anything that is failing currently

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                  • rudenickundefined
                    rudenick
                    last edited by

                    Duet software turns out to be very difficult to be made to work despite doing everything like the guides said.

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                    • Phaedruxundefined
                      Phaedrux Moderator
                      last edited by

                      It's not the temperature of the bed, it's the temperature of the probe. You've chosen a probe that is sensitive to temperature variance. It has a thermistor to help correct for that, but you're not using it.

                      You also seem to have some mechanical problems if there is that much sag.

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • rudenickundefined
                        rudenick
                        last edited by

                        @dc42 Hope it is a worthwhile bother. I'm at the wits end with configuring duet for my ender 3 and pinda probe since May.

                        The Z offset is inconsistent and two Z axis true leveling is inconsistent as well.

                        • I have replaced the springs with PCABS washers.
                        • Probe measures at static 60C
                        • Z rod distances, bed size, probe to nozzle distances are correct.
                        • Z motor order and cabling is correct.

                        Please, please help

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                        • rudenickundefined
                          rudenick
                          last edited by

                          But if the probe always meets the same bed temperature - the variance is constant right?
                          Thermistor is there to correct the non-constant bed temperatures to keep the same offset between 60 and 90C but I'm using only one

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                          • Phaedruxundefined
                            Phaedrux Moderator
                            last edited by

                            Let's do a test. Change your M558 to use P0 to enable manual probing. Then go through your normal homing and leveling routine. It will ask you to manually jog the nozzle to touch the bed when a probe is requested. This will eliminate the probe from the equation entirely.

                            I would suggest you remove this section from homeall entirely so that homeall is used for homing the axis only.

                            G1 H2 X0 Y0 Z20 F6000   ; Go to home position
                            G32
                            G31 Z0.498 ;Z0.540
                            ;G29 S1
                            G28 Z
                            

                            Then you can use bed.g/g32 for the leveling as that's where it's intended to exist.

                            Z-Bot CoreXY Build | Thingiverse Profile

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