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    Z-probe triggers way above table during HOME ALL

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    • Billsrf
      Billsrf last edited by

      @dc42 my IR Z-probe has started triggering way above the table during the home.all movement. But, once you have home.all, you can push Z-home and it performs the correct Z-movement at the correct height. I can not find anything that has changed. Worked flawlessly for over 1000 hours of print time, now this just showed up. Any suggestions???0_1555958591161_config.g 1_1555958650642_homez.g 0_1555958650641_homeall.g

      www.dpp3d.com , pellet fed large format 3d printers

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      • dc42
        dc42 administrators last edited by

        Various possibilities:

        • If it's the old style sensor with through hole optical components, those components may have been bent out of position
        • Has the bed surface changed? Some sensors trigger at large heights when the bed is highly reflective.
        • Is there bright sunlight (no clouds in front of the sun) shining directly on the bed? That can saturate the sensor, and the LED will blink rapidly to indicate this.
        • Have the optical components become contaminated with filament or dust? You can clean them using a cotton bud moistened with isopropanol.

        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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        • Billsrf
          Billsrf last edited by

          @dc42 said in Z-probe triggers way above table during HOME ALL:

          If it's the old style sensor with through hole optical components, those components may have been bent out of position
          Has the bed surface changed? Some sensors trigger at large heights when the bed is highly reflective.
          Is there bright sunlight (no clouds in front of the sun) shining directly on the bed? That can saturate the sensor, and the LED will blink rapidly to indicate this.
          Have the optical components become contaminated with filament or dust? You can clean them using a cotton bud moistened with isopropanol.

          Nothing has changed. I even swapped out the sensor for a new one. Same exact thing.
          I even went back and uploaded the firmware again, no change.

          My big question is, why it works perfectly when i use HOME Z, but not HOME.ALL?0_1555959586222_Firmware version.JPG

          www.dpp3d.com , pellet fed large format 3d printers

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          • dc42
            dc42 administrators last edited by

            When it triggers prematurely, does the red LED on the sensor illuminate?

            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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            • Billsrf
              Billsrf last edited by

              How do check that? I attached my config.g, home.all and home.z files. my home.all calls for a G30 to trigger and the config.g z-probe calls for a G31 at the same point. When I change the G31 in the config file to G30, it crashed into the bed without triggering, so I changed it back to G31

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              • Billsrf
                Billsrf last edited by

                swap that, HOME.ALL calls for G30, CONFIG.G calls for G31, HOME.Z calls for a G30

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                • dc42
                  dc42 administrators @Billsrf last edited by

                  @billsrf said in Z-probe triggers way above table during HOME ALL:

                  How do check that?

                  By observing it when you run homeall. When it stops prematurely, also look at the Z probe reading in DWC, or send G31 without parameters to report it.

                  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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                  • Billsrf
                    Billsrf @dc42 last edited by

                    @dc42 yes it flashes just like it is at the bed

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                    • dc42
                      dc42 administrators @Billsrf last edited by

                      @billsrf said in Z-probe triggers way above table during HOME ALL:

                      @dc42 yes it flashes just like it is at the bed

                      Can you confirm that it flashes just once? Not 2 or 4 times, like it does when it initialises?

                      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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                      • Billsrf
                        Billsrf last edited by

                        it is roughly 50mm above the bed, it flashed 1 time just like normal then moves up 5mm. 0_1555960761051_Z probe.JPG

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                        • Phaedrux
                          Phaedrux Moderator last edited by

                          G31 P500 X570 Y570 Z0

                          This looks a little off from your config.g.

                          Is the probe really X570 and Y570 away from your nozzle?

                          You also haven't calibrated the Z trigger height.

                          Z-Bot CoreXY Build | Thingiverse Profile

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                          • Billsrf
                            Billsrf last edited by

                            after home.all, I can push HOME.Z and it moves to the bed and sets the correct nozzle height

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                            • Billsrf
                              Billsrf @Phaedrux last edited by

                              @phaedrux i have the offset Z trigger height set to zero for testing. What should the X-Y settings be for the G31? isnt it center of my build plate?

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                              • Phaedrux
                                Phaedrux Moderator @Billsrf last edited by

                                @billsrf The X and Y values for G31 should be the distance of the probe from the nozzle. Just as the Z value is the distance from the probe to the nozzle tip in Z.

                                If the probe is to the left, the value will be -x.
                                If the probe is to the right, the value will be +x.
                                If the probe is to the front, the value will be -y.
                                If the probe is to the back, the value will be +y.

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • Billsrf
                                  Billsrf last edited by

                                  my BED.G looks like it is missing a lot of information now for some reason. 0_1555961191732_bed.g

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                                  • Phaedrux
                                    Phaedrux Moderator last edited by

                                    It looks like your bed.g is currently setup to just do a mesh grid compensation run.

                                    Z-Bot CoreXY Build | Thingiverse Profile

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                                    • Billsrf
                                      Billsrf @Phaedrux last edited by

                                      @phaedrux ok, i will measure the offset and change that in the G31 in config.g

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                                      • Billsrf
                                        Billsrf last edited by

                                        If I am not using a bed compensation. Why would that be making my trigger so high off my build surface? It moves down about 20 mm then triggers during home.all. But, if i do a home.z afterwards it moves to the correct trigger height and it is ready to go

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                                        • Phaedrux
                                          Phaedrux Moderator last edited by

                                          Have you gone through these steps?

                                          https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

                                          Z-Bot CoreXY Build | Thingiverse Profile

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                                          • Billsrf
                                            Billsrf last edited by

                                            yes 9 times. I will change the offsets and then go through the probe set up again

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                                            • Billsrf
                                              Billsrf last edited by

                                              @dc42 went through the same set up process as described in test and calibrate Z probe, same results as before, it moves down 10 mm then triggers then stops. I did nottice, as it is moving towards the X-Y home position, the IR sensor flashes 3 times like it is just initialized. Never done that before either.

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                                              • Billsrf
                                                Billsrf @Phaedrux last edited by

                                                @phaedrux went through the same set up process as described in test and calibrate Z probe, same results as before, it moves down 10 mm then triggers then stops. I did nottice, as it is moving towards the X-Y home position, the IR sensor flashes 3 times like it is just initialized. Never done that before either.

                                                www.dpp3d.com , pellet fed large format 3d printers

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                                                • Billsrf
                                                  Billsrf last edited by

                                                  Tried running a G29 and this is what I am getting back now. I have never had this kind of issue with my duet3d before. its triggering during moves.0_1555968974806_G29 Probing.JPG

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                                                  • Phaedrux
                                                    Phaedrux Moderator last edited by

                                                    Is the sensor on the IR probe dirty or damaged at all?

                                                    Z-Bot CoreXY Build | Thingiverse Profile

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                                                    • Billsrf
                                                      Billsrf @Phaedrux last edited by

                                                      @phaedrux No, i have even swapped it out with a new probe and it does the same thing!! I am baffled!!! to say the least. As you can see it won't run a G29 anymore either

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