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    Heigh error after calibrating

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    • TristanKoelnundefined
      TristanKoeln
      last edited by

      Hey im using a duet wifi for my 3d printer, i changed the print head. than i wanted to re-calibrate the printer using a bl touch, but now the print head is allways to high, i tried to higher the offset and to lower the z abs value with no result, can some one help me ?

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      • ziggymanpopoundefined
        ziggymanpopo
        last edited by

        Check out the documentation
        tab on this site ,,go to the "wifi" secton ,,,then setup
        There you will find a section that says calibtate
        Z probe if you follow the instuction that should fix your issue πŸ™‚

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        • TristanKoelnundefined
          TristanKoeln
          last edited by

          I calibrated using
          G30
          than moving nozzel down till it hits the bed
          G92 Z0
          G1 Z10
          G30 S-1

          than i put the offset in the config, that not worked

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          • Stephen6309undefined
            Stephen6309
            last edited by Stephen6309

            @TristanKoeln To get the probe closer to the bed you need to increase the Z offset in G31. Make sure you have homed all the axes. Also make sure you one have one G31.

            I use a macro that I call in the slider's start gcode to set G31.
            For example:
            ; CXY-MSv1
            G31 P500 X0 Y-60 Z1.98 ; Set Z probe trigger value, offset and trigger height; increase to get closer
            M291 P"PETG Offset" S0 T5

            I use the paper method to find Z0.

            I use this since it's faster to edit macro than waiting for the duet to reboot. I do have a G31 in config.g with Z0 for the offset.

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            • TristanKoelnundefined
              TristanKoeln
              last edited by

              @Stephen6309 what do you mean with puting it in a macro to edit it faster?

              Stephen6309undefined 1 Reply Last reply Reply Quote 0
              • Stephen6309undefined
                Stephen6309 @TristanKoeln
                last edited by Stephen6309

                @TristanKoeln The code I showed above it in a macro, in the macors folder and it called PETGOffset. In the slicers start gcode I have added: M98 P"/macros/PETGOffset" ; set z probe offsets
                to call the macro. Editing a macro is faster than editing config.g and then waiting for the duet to restart after the edit.

                Also, I have a different one for setting PLA, since the hotend is at a lower temp than PETG. First line in the macro is the printer's name, since I have two printers.

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                • ziggymanpopoundefined
                  ziggymanpopo
                  last edited by

                  Another way is to use M564 S0 that will allow you to probe down to the glas it overrided the previous G92 Z0 comand which tells the printer where Z0
                  Or your bed height is at ....
                  Checknout the documentation tab on this site (three bars top left)
                  You will find all of the process under the z prob section look for a link to calibrate z-probe
                  This link takes you to what you seek
                  Good luck..πŸ™‚

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    Post your config.g homeall homez bed.g and start gcode so we can see everything that could be going on in sequence.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    TristanKoelnundefined 1 Reply Last reply Reply Quote 0
                    • TristanKoelnundefined
                      TristanKoeln @Phaedrux
                      last edited by

                      @Phaedrux here are all my files:
                      homez.g homeall.g config.g bed.g
                      Startcode:
                      M98 P"/macros/PLA_Offset" ;set z probe offsets
                      G29 S1 ;load heighmap
                      @Stephen6309 i add the macro thing xD

                      fcwiltundefined 1 Reply Last reply Reply Quote 0
                      • fcwiltundefined
                        fcwilt @TristanKoeln
                        last edited by

                        @TristanKoeln said in Heigh error after calibrating:

                        Startcode:
                        M98 P"/macros/PLA_Offset" ;set z probe offsets
                        G29 S1 ;load heighmap
                        @Stephen6309 i add the macro thing xD

                        Adjusting the probe Z trigger height is a curious way to make such an adjustment.

                        The probe Z trigger height should be a constant that only varies with temperature perhaps.

                        If you wish to tweak the Z height when printing different materials you may want to use the "baby steps" setting instead - see M290.

                        You can, if you wish, make use of the filament handling feature of DWC to specify different filaments at the start of a print and obtain different Z height "tweaks" using M290 based on the selected filament.

                        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

                        TristanKoelnundefined 1 Reply Last reply Reply Quote 0
                        • TristanKoelnundefined
                          TristanKoeln @fcwilt
                          last edited by

                          @fcwilt thx for you advice, but first i want that my printer prints something befor i will realy start tweaking out some thing, right now my problem is that the nozzel is allways 1-2 mm to high

                          fcwiltundefined 1 Reply Last reply Reply Quote 0
                          • fcwiltundefined
                            fcwilt @TristanKoeln
                            last edited by

                            @TristanKoeln said in Heigh error after calibrating:

                            @fcwilt thx for you advice, but first i want that my printer prints something befor i will realy start tweaking out some thing, right now my problem is that the nozzel is allways 1-2 mm to high

                            OK that should be easy to correct.

                            One thing you need to remember is that before creating a height map with G29 S0 and before loading the height map with G29 S1 you need to perform a G1 to move the probe to the center of the bed and then do a single G30 to set the Z=0 datum.

                            And of course for the Z probe to work properly it's Z trigger height value (in G31) needs to be set to the correct value.

                            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

                            Stephen6309undefined 1 Reply Last reply Reply Quote 0
                            • TristanKoelnundefined
                              TristanKoeln
                              last edited by

                              @fcwilt all of that is done see in the homeZ and the trigger hiegh is calibrated with :
                              Move the nozzel to the middle
                              G30
                              than moving nozzel down till it hits the bed
                              G92 Z0
                              G1 Z10
                              G30 S-1

                              fcwiltundefined 1 Reply Last reply Reply Quote 0
                              • fcwiltundefined
                                fcwilt @TristanKoeln
                                last edited by

                                @TristanKoeln said in Heigh error after calibrating:

                                @fcwilt all of that is done see in the homeZ and the trigger hiegh is calibrated with :
                                Move the nozzel to the middle
                                G30
                                than moving nozzel down till it hits the bed
                                G92 Z0
                                G1 Z10
                                G30 S-1

                                That calibration looks fine.

                                However homeZ.g looks a bit wonky.

                                I've re-posted it here using the </> tag:

                                ; homez.g
                                ; called to home the Z axis
                                ;
                                G91               ; relative positioning
                                G1 H2 Z10 F6000   ; lift Z relative to current position
                                G1 H1 Z-500 F3000 ;Go down till endstop
                                G1 H2 Z10 F6000
                                G1 X200 Y200 F4000 ;go to midle
                                G30 ; move Z down until the endstop is triggered
                                G92 Z0         ; set Z position to axis minimum (you may want to adjust this)
                                
                                ; Uncomment the following lines to lift Z after probing
                                ;G91              ; relative positioning
                                ;G1 Z10 F100      ; lift Z relative to current position
                                G90              ; absolute positioning
                                

                                This line, which occurs after the G30, may be the cause of your problems:

                                G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

                                On my printer, running firmware 3.2.2, after a G30 the Z position is the probe dive height (the H parameter in M558) plus the Z trigger height (the Z parameter in G31).

                                But the G92 is telling the firmware that the Z position is 0.

                                Perhaps that is correct for your firmware but it would cause a problem with mine.

                                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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                                • TristanKoelnundefined
                                  TristanKoeln
                                  last edited by

                                  @fcwilt with the G92 Z(dive heigh+triger high)
                                  is still the same problem

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                                  • fcwiltundefined
                                    fcwilt @TristanKoeln
                                    last edited by fcwilt

                                    @TristanKoeln said in Heigh error after calibrating:

                                    @fcwilt with the G92 Z(dive heigh+triger high)
                                    is still the same problem

                                    After you performed the calibration routine you posted did you go back and update the G31 command with the correct Z trigger height as reported by the G30 S-1?

                                    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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                                    • TristanKoelnundefined
                                      TristanKoeln
                                      last edited by

                                      @fcwilt jup its 3.760

                                      fcwiltundefined 1 Reply Last reply Reply Quote 0
                                      • fcwiltundefined
                                        fcwilt @TristanKoeln
                                        last edited by

                                        @TristanKoeln said in Heigh error after calibrating:

                                        @fcwilt with the G92 Z(dive heigh+triger high)
                                        is still the same problem

                                        Since the G30 leaves Z at dive height + trigger height setting it again to the same value with G92 is redundant.

                                        It doesn't hurt but isn't needed.

                                        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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                                        • fcwiltundefined
                                          fcwilt @TristanKoeln
                                          last edited by

                                          @TristanKoeln said in Heigh error after calibrating:

                                          @fcwilt jup its 3.760

                                          Are you still running the "PLA" macro?

                                          If so what does it look like.

                                          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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                                          • TristanKoelnundefined
                                            TristanKoeln
                                            last edited by

                                            @fcwilt

                                            G31 X-31.7 Y3,16 Z3,760 P25
                                            M291 P"PLA Offset" S0 T5
                                            
                                            fcwiltundefined 1 Reply Last reply Reply Quote 0
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