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    Switch Z-probe not inverting

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    • dc42undefined
      dc42 administrators
      last edited by

      What is the exact M558 command that you tried? Are you certain that there isn't another M558 line later in config.g ?

      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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      • madmattcoundefined
        madmattco
        last edited by

        0_1530394460156_config.g

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        • madmattcoundefined
          madmattco
          last edited by

          It is set to I0 in that file but I also tried I1 too

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          • madmattcoundefined
            madmattco
            last edited by

            Would it be prudent to try a version where the E param was still valid in M574?

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            • dc42undefined
              dc42 administrators
              last edited by dc42

              That M558 command looks ok to me. Changing between I0 and I1 should make the Z probe reading when not triggered change between 0 and 1000.

              Check that you don't have a M558 command in config-override.g.

              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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              • deckingmanundefined
                deckingman
                last edited by

                I've just had a thought - does the switch have a series LED by any chance? The Metrol positioning switch that I use does, and so the value for the probe reading doesn't go to zero but only down to around 600 IIRC. So I use P1 for the probe type in my M558 and then in G31 I use P700 for the trigger value. Even if the switch doesn't have an LED, it might be worth checking that the Z probe reading does in fact go to zero when triggered. If it doesn't, using P1 for the probe type and setting an appropriate trigger threshold in G31 might be a solution?

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

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                • madmattcoundefined
                  madmattco
                  last edited by

                  I don't have a config-override file. And there is no led here. this is a film touch switch style leveling probe that attaches to the nozzle

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                  • madmattcoundefined
                    madmattco
                    last edited by

                    @deckingman can you or @dc42 tell me exactly what the trigger value is for? ive set it at 0. 600 and 1000 so far with it making no changes.

                    deckingmanundefined T3P3Tonyundefined 2 Replies Last reply Reply Quote 0
                    • deckingmanundefined
                      deckingman @madmattco
                      last edited by

                      @madmattco

                      DC42 is the man really but as he's on vacation and taking some well earned time off, I'll do my best. When you use a Z probe with a output that isn't a simple on-off, the probe reading will change when it gets near or at the trigger point. So when it isn't triggered, it'll read 1,000 ( I think) and when it is triggered, it'll read something else. If it's a simple switch, that "something else" will be zero but with say an IR probe, it'll be about 500 or less. What does it show for you on the machine properties tab?

                      Ian
                      https://somei3deas.wordpress.com/
                      https://www.youtube.com/@deckingman

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                      • T3P3Tonyundefined
                        T3P3Tony administrators @madmattco
                        last edited by

                        @madmattco

                        It should show 0 when not triggered and 1000 when triggered if its a simple switch.

                        www.duet3d.com

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                        • madmattcoundefined
                          madmattco @T3P3Tony
                          last edited by

                          @t3p3tony It does the opposite of that

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                          • madmattcoundefined
                            madmattco @deckingman
                            last edited by

                            @deckingman https://puu.sh/AP65q/df543c1ca3.png is untriggered.
                            https://puu.sh/AP66h/a74ec1a9b0.png is triggered

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                            • resamundefined
                              resam
                              last edited by

                              I think the DWC display is not aware of any invert flags you configured.
                              Don't rely on the raw value displayed in DWC. Use M119 instead.

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                              • madmattcoundefined
                                madmattco @resam
                                last edited by

                                @resam https://puu.sh/AP6v0/8242eb7b3f.png bottom line is not triggered. top is triggered.

                                T3P3Tonyundefined 1 Reply Last reply Reply Quote 0
                                • resamundefined
                                  resam
                                  last edited by

                                  And does it change with M558 P4 I1 H5 F120 T3000?

                                  madmattcoundefined 1 Reply Last reply Reply Quote 0
                                  • madmattcoundefined
                                    madmattco @resam
                                    last edited by

                                    @resam No. Thats my dilemma. Its driving me nuts lol

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                                    • resamundefined
                                      resam
                                      last edited by

                                      Did you try:
                                      M574 X2 Y2 Z0 S0 and M558 P4 I1 H5 F120 T3000 (or I0)

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                                      • madmattcoundefined
                                        madmattco
                                        last edited by

                                        Will having Z set to 0 work properly when on a delta?

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                                        • T3P3Tonyundefined
                                          T3P3Tony administrators @madmattco
                                          last edited by

                                          @madmattco so if you send:

                                          M558 I1 does the probe setting change;
                                          0_1530457869993_b531902b-be8e-4e97-9072-15863069a2ea-image.png

                                          Ignore my other settings in the screen shot
                                          As you can see you can send M558 with no parameters to get a read out of the current settings
                                          Try M119 after both M558 I0 and M558 I1

                                          www.duet3d.com

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                                          • madmattcoundefined
                                            madmattco @T3P3Tony
                                            last edited by

                                            @t3p3tony I owe you a pint. https://puu.sh/AP6NT/d101e9887d.png
                                            My question is, Why would it suddenly work when only issuing the M558 I1 command by its self?

                                            deckingmanundefined 1 Reply Last reply Reply Quote 0
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