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    Duet 3 Scanning Z probe

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    • 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 E3D MS/TC setup and a RatRig Hybrid. 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 E3D MS/TC setup and a RatRig Hybrid. 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

                            1 Reply Last reply Reply Quote 0
                            • 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 E3D MS/TC setup and a RatRig Hybrid. 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
                                    • zaptaundefined
                                      zapta @A Former User
                                      last edited by zapta

                                      @Herve_Smith, what the scanner provides is similar to what the inductive probe provides with Voron 2.4 but at an order of magnitude faster. That is, height measurement relative to a known zero, which is provided by the 'tap' end switch or similar.

                                      In other words, it takes a z=0 point at a given (x,y) and quickly provide zero points on the entire bed surface. The alternative is to use an absolute Z probe (e.g. BL Touch or Cliky) and slowly probe the entire bed, or wait until a fast absolute Z probe will be invented.

                                      Wether this product has value to your application it's up to you.

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

                                        @Notepad said in Duet 3 Scanning Z probe:

                                        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.

                                        And the speed would allow creating a new height map for every print which would be nice for me since I use a variety of printing surfaces.

                                        For me the speed is the real benefit. The 8mm inductive sensors I use take up very little space.

                                        Frederick

                                        Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                                        Notepadundefined 1 Reply Last reply Reply Quote 0
                                        • Notepadundefined
                                          Notepad @fcwilt
                                          last edited by

                                          @fcwilt said in Duet 3 Scanning Z probe:

                                          The 8mm inductive sensors I use take up very little space.

                                          I predominantly use 12mm inductive probes, and while the size is bigger its not a massive issue. But the time to probe the bed is just soo slow. On a regular bed it takes ~3 minutes and on a larger bed at least 6 minutes.

                                          Even If I have to mix both, The extra speed this probe will have is going to be well worth it.

                                          The real bamboo printer manufacturer

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

                                            @Notepad said in Duet 3 Scanning Z probe:

                                            I predominantly use 12mm inductive probes, and while the size is bigger its not a massive issue. But the time to probe the bed is just soo slow. On a regular bed it takes ~3 minutes and on a larger bed at least 6 minutes.

                                            Yes it takes a while but how often do you currently do it?

                                            With the hours and hours spent printing things what is the "cost" of a few minutes creating a height map every once in a while?

                                            Frederick

                                            Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                                            Notepadundefined 1 Reply Last reply Reply Quote 0
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