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    Can't Home Z with a Z Probe installed

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    • Vaeiundefined
      Vaei
      last edited by Vaei

      I recently connected an EZABL and everything is working - when I put my finger under it, it's triggered.

      However I can't home Z.

      I read the guide here and specifically "Homing Z using a Z probe": https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter#Section_Homing_Z

      It's illogical to me because it tells you to G30 to effectively home the Z using the probe but G30 can't run without Z homed. What do I do?

      I tried using M574 to set Z end stop to use the probe but that didn't work either.

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      • dc42undefined
        dc42 administrators
        last edited by

        G30 needs X and Y to be homed first, but not Z.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • Vaeiundefined
          Vaei
          last edited by Vaei

          X and Y are homed yet the error still occurs. What does it need?

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          • Vaeiundefined
            Vaei
            last edited by

            This is my config.json for reprapfirmware configurator if that helps

            https://drive.google.com/open?id=12VJ0j6iLhLLwgAJG4DQbLxDPtQtFVlSx

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            • Phaedruxundefined
              Phaedrux Moderator
              last edited by

              Can you post your config.g and your homing files?

              Z-Bot CoreXY Build | Thingiverse Profile

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              • Vaeiundefined
                Vaei
                last edited by

                @phaedrux said in Can't Home Z with a Z Probe installed:

                Can you post your config.g and your homing files?

                Sure

                https://drive.google.com/open?id=15q-ReiRuzfv0u6V4hmQRy1bwbsqbV75e

                Phaedruxundefined 1 Reply Last reply Reply Quote 0
                • Phaedruxundefined
                  Phaedrux Moderator @Vaei
                  last edited by

                  @vaei unable to access your drive

                  Z-Bot CoreXY Build | Thingiverse Profile

                  dc42undefined 1 Reply Last reply Reply Quote 0
                  • dc42undefined
                    dc42 administrators @Phaedrux
                    last edited by

                    @phaedrux said in Can't Home Z with a Z Probe installed:

                    @vaei unable to access your drive

                    Same here.

                    Duet WiFi hardware designer and firmware engineer
                    Please do not ask me for Duet support via PM or email, use the forum
                    http://www.escher3d.com, https://miscsolutions.wordpress.com

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                    • Vaeiundefined
                      Vaei
                      last edited by T3P3Tony

                      That's odd somehow the public sharing turned off

                      <edited to remove the link>!

                      Phaedruxundefined 1 Reply Last reply Reply Quote 0
                      • Phaedruxundefined
                        Phaedrux Moderator @Vaei
                        last edited by

                        @vaei I don't think you meant to link that.

                        Z-Bot CoreXY Build | Thingiverse Profile

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                        • Phaedruxundefined
                          Phaedrux Moderator
                          last edited by

                          I'm not sure if it matters, but you have your M574 command set to use a Z endstop currently.

                          Try changing that to M574 Z1 S2 ; Use zprobe and home to Z Min.

                          I say it may not matter because in the next few lines you specify the z probe in M558.

                          Your Homeall.g looks ok.

                          Your Homez.g won't work unless XY and already homed or you add S2 to your G1 move to get the probe in position.

                          Z-Bot CoreXY Build | Thingiverse Profile

                          Vaeiundefined 1 Reply Last reply Reply Quote 0
                          • Vaeiundefined
                            Vaei @Phaedrux
                            last edited by

                            @phaedrux said in Can't Home Z with a Z Probe installed:

                            I'm not sure if it matters, but you have your M574 command set to use a Z endstop currently.

                            Try changing that to M574 Z1 S2 ; Use zprobe and home to Z Min.

                            I say it may not matter because in the next few lines you specify the z probe in M558.

                            Your Homeall.g looks ok.

                            Your Homez.g won't work unless XY and already homed or you add S2 to your G1 move to get the probe in position.

                            Thanks for the help 🙂 Unfortunately the same thing occurs.

                            By the way, does the reprap configurator have a setting for Mode 5? None of them have their mode numbers shown and it's 5 that works for mine. The others don't see it trigger. I keep having to manually set it after the fact.

                            I thought I uploaded the config.zip - if so what was in it that I shouldn't have linked it? Wifi p/w?

                            Well, I'm more or less at a loss.

                            T3P3Tonyundefined 1 Reply Last reply Reply Quote 0
                            • T3P3Tonyundefined
                              T3P3Tony administrators @Vaei
                              last edited by

                              @vaei said in Can't Home Z with a Z Probe installed:

                              I thought I uploaded the config.zip - if so what was in it that I shouldn't have linked it? Wifi p/w?

                              You linked your timesheet spreadsheet which is why i removed the link!

                              the older link works for your config.zip

                              Try adding an S2 after the movement commands in your homeZ and home all.g:

                              G1 X15 Y73.5 F6000 S2

                              You have the EZABL setup as probe type 1, is that correct ( I don't know how it works - capacitive?)? You say it triggers correctly so I will assume it has an analog output, actually i just saw this:

                              @vaei said in Can't Home Z with a Z Probe installed:

                              By the way, does the reprap configurator have a setting for Mode 5? None of them have their mode numbers shown and it's 5 that works for mine.

                              Your sharedconfig.g has the mode set to 1 in M558:

                              M558 P1 H5 F120 T6000

                              the RepRapFirmware configurator lets you choose the type of Z probe:
                              0_1530635754385_2a481633-40f0-49d9-ae9c-3896334eb3a9-image.png

                              With it set to "switch" I get "M558 P0.." which is wrong it should be P4 or P5. Thanks for finding this bug - I will report it to @chrishamm

                              www.duet3d.com

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                              • Vaeiundefined
                                Vaei
                                last edited by

                                I got it triggering correctly with Mode 1 but I need to set I1 with M558 also for it to work.

                                Unfortunately I still can't home, even after the changes adding S2.

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                                • Phaedruxundefined
                                  Phaedrux Moderator
                                  last edited by

                                  What do your config and homing files look like now?

                                  Z-Bot CoreXY Build | Thingiverse Profile

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