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    Duet 3 Scanning Z probe

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    • T3P3Tonyundefined
      T3P3Tony administrators
      last edited by

      We have been working on a Scanning Z probe for Duet 3 / RepRapfirmware, I am happy to announce the details now:

      192e9420-fccf-4cf2-9a5f-69410a495e8d-image.png

      https://www.duet3d.com/blog/Duet3d-Scanning-Z-Probe

      https://docs.duet3d.com/en/Duet3D_hardware/Duet_3_family/Duet_3_Scanning_Z_Probe

      We are aiming to get supplies to our resellers by the 22 of November

      https://youtu.be/k-wD0_l69SQ

      www.duet3d.com

      fcwiltundefined oozeBotundefined jens55undefined zaptaundefined 5 Replies Last reply Reply Quote 10
      • fcwiltundefined
        fcwilt @T3P3Tony
        last edited by

        @T3P3Tony

        I am going to have to give that a try.

        Thanks.

        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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        • oozeBotundefined
          oozeBot @T3P3Tony
          last edited by

          @T3P3Tony what's the upper temp limitations on this initial version and is there any opportunity to use the build plate's temp within RRF to average at higher temps? Or will that only be available on future versions with a built-in thermistor to the probe? Also, is it possible to set actual z-height with the probe? Or just scan the surface once z-height has been set. Thanks!

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          • jens55undefined
            jens55 @T3P3Tony
            last edited by

            @T3P3Tony , just to confirm - this probe does not work with a glass surface ? .... and presumably doesn't work with any other non-metal surface such as PEI, gerolite etc etc?
            Thank you for mentioning the increased number of probing points available for the 6HC, I was unaware.

            1 Reply Last reply Reply Quote 0
            • fcwiltundefined
              fcwilt @T3P3Tony
              last edited by

              @T3P3Tony

              And if it works like I hope I have printers running on v2 hardware that will need to be updated.

              So clearly this is a clever plan to sell more v3 hardware. 😀

              Thanks.

              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

              A Former User? 1 Reply Last reply Reply Quote 0
              • R4ffersundefined
                R4ffers
                last edited by

                I definitely want to give this a go

                Mb6hc + 3hc + 1lc on Voron V2.4, Mini 5+ exp 2+ on Vzbot 235 AWD, Duet 2 wifi on Ox CNC and Mini 5+ on Millennium Milo v1.5 mini mill.

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                • A Former User?
                  A Former User @fcwilt
                  last edited by

                  @fcwilt I'll wait a bit and see if they combine this with the tool board. A 1LC+ would be awesome!

                  fcwiltundefined o_lampeundefined 2 Replies Last reply Reply Quote 2
                  • fcwiltundefined
                    fcwilt @A Former User
                    last edited by

                    @KenW

                    That would be good.

                    I have a few 1LC boards but have never gotten around to trying them out on one of my existing printers.

                    Though I have re-designed my E3D Hemera XS mount that I have on my E3D MS/TC printer with the idea of trying them.

                    Too much to do and too little time. 😖

                    Thanks.

                    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

                    A Former User? 1 Reply Last reply Reply Quote 0
                    • A Former User?
                      A Former User @fcwilt
                      last edited by

                      @fcwilt Figure since they included the accelerometer and it has the CAN-FD hardware adding it to a toolboard would seem to be an option.
                      Replace the JST-ZH with a larger connector and keep the 3 and 4 pin fans and other IO and I would definitely reduce the wire count on my printers.

                      1 Reply Last reply Reply Quote 0
                      • o_lampeundefined
                        o_lampe @A Former User
                        last edited by

                        @KenW said in Duet 3 Scanning Z probe:

                        @fcwilt I'll wait a bit and see if they combine this with the tool board. A 1LC+ would be awesome!

                        Didn't take long to fulfill your wish 😁

                        A Former User? 1 Reply Last reply Reply Quote 0
                        • A Former User?
                          A Former User @o_lampe
                          last edited by A Former User

                          @o_lampe

                          Now I get to wait until some make it across the ocean blue.
                          Documentation to make sure it can be made to work is needed too.

                          I see it has 3 pin fans so the 4 pin 12v 4010's I finally found are not usable but the 3 pin 12v blowers might be. The ZH connector is history, several others are beefier and all appear to be easier for an old dude to crimp.

                          I'll pause my work on the rebuild of the printer and the eventual updating of the other 2 to see . The Roto looks interesting too. And might solve the width issue I am having with the IDEX conversion idea. As well as weight.

                          1 Reply Last reply Reply Quote 1
                          • zaptaundefined
                            zapta @T3P3Tony
                            last edited by

                            Duet3D keeps innovating. 😉 This is very good.

                            I guess that with this fast scanner, it's more feasible to run bed mesh before each print.

                            1 Reply Last reply Reply Quote 1
                            • Notepadundefined
                              Notepad
                              last edited by

                              Really excited to try this. If it can do the auto calibration for sensitivity, it may be able to remove the issue that plagues regular inductive probes because of ambient temperature drift.

                              The real bamboo printer manufacturer

                              droftartsundefined dc42undefined 2 Replies Last reply Reply Quote 0
                              • droftartsundefined
                                droftarts administrators @Notepad
                                last edited by

                                @Notepad yes, it does an auto-calibration before scanning. The probe board also has a thermistor, an accelerometer and CAN connector. It should be possible to compensate for temperature using the thermistor, or use the thermistor to check that the temperature is the same for each scan. So it could theoretically be used as a Z probe, but we currently recommend a more reliable bed surface probe; our demo machine uses Voron tap, but any other Z probe should be fine.

                                The probe scans the top-most metal surface, in the case of the Voron Tridex at the show, this is the spring steel backing of the PEI sheet. We found we could put a business card between the PEI sheet and the aluminium bed, and it would show as a large deviation in the bed! If it was in the right place you could see the rectangular outline of the card. I forgot to take a picture of it, but it showed the bed mesh was being updated each time it was scanned, ie not a faked show display!

                                Ian

                                Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

                                A Former User? 1 Reply Last reply Reply Quote 2
                                • dc42undefined
                                  dc42 administrators @Notepad
                                  last edited by

                                  @Notepad the auto calibration is only possible if you have another way of establishing Z=0 first. This could be another type of Z probe such as a BLTouch, or manual probing.

                                  We haven't yet tried using the scanning probe as the only Z probe. To do this you would need to do the following:

                                  • Set an accurate Z=0 reference, run the calibration command, and save the results in config.g
                                  • At several different temperatures, measure the Z height that produces the reference output value from the probe, and use these measurements to set up suitable temperature compensation in the M558 command.

                                  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

                                  Notepadundefined fcwiltundefined 2 Replies Last reply Reply Quote 1
                                  • Notepadundefined
                                    Notepad @dc42
                                    last edited by

                                    @dc42 said in Duet 3 Scanning Z probe:

                                    the auto calibration is only possible if you have another way of establishing Z=0 first

                                    Ahh, so reference point first, then it can scan the entire bed.

                                    We haven't yet tried using the scanning probe as the only Z probe. To do this you would need to do the following:

                                    Ill definitely be testing this out once I get mine, as a bit of pain calibrating it initially will mean I don't have to constantly carry a inductive/BLTouch on the toolhead.

                                    The real bamboo printer manufacturer

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                                    • fcwiltundefined
                                      fcwilt @dc42
                                      last edited by

                                      @dc42 said in Duet 3 Scanning Z probe:

                                      We haven't yet tried using the scanning probe as the only Z probe.

                                      That is a bit of bad news.

                                      It makes the product less appealing.

                                      I need to think on this a bit.

                                      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

                                      Notepadundefined droftartsundefined 2 Replies Last reply Reply Quote 1
                                      • zaptaundefined
                                        zapta
                                        last edited by

                                        If I got it correctly, this is the third Duet3D Z sensor, each with a very different technology. The quest for the ultimate Z sensor continues. 😉

                                        1 Reply Last reply Reply Quote 1
                                        • A Former User?
                                          A Former User @droftarts
                                          last edited by A Former User

                                          This post is deleted!
                                          zaptaundefined 1 Reply Last reply Reply Quote 0
                                          • Notepadundefined
                                            Notepad @fcwilt
                                            last edited by

                                            @fcwilt said in reference to @dc42 Duet 3 Scanning Z probe:

                                            We haven't yet tried using the scanning probe as the only Z probe.

                                            It definitely makes the switch over not as simple of a choice. Hopefully if I can figure out a test cycle or homing regime to use it as the only Z probe, Ill share that to everyone.

                                            If it cant be used stand alone. The main selling point of fast and compact bed scanning looses the compact aspect as there would need to be a redundant probe just for initial offset measurements.

                                            The real bamboo printer manufacturer

                                            fcwiltundefined 1 Reply Last reply Reply Quote 0
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