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    Piezo20 probe and piezo kit now available

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    • deckingmanundefined
      deckingman
      last edited by

      @dc42:

      Yes G31 accepts negative values, which is what you need to use for any sort of nozzle-contact probe.

      Thank you.

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

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      • DjDemonDundefined
        DjDemonD
        last edited by

        Yes you can have a negative offset, but I am curious to find out if you will actually need one. If I set -0.1mm as my offset I'd be milling a line in my print bed.

        Simon. Precision Piezo Z-Probe Technology
        www.precisionpiezo.co.uk
        PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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        • deckingmanundefined
          deckingman
          last edited by

          @DjDemonD:

          Yes you can have a negative offset, but I am curious to find out if you will actually need one. If I set -0.1mm as my offset I'd be milling a line in my print bed.

          No actually you won't. It works kind of back to front to what one might expect. When it's positive, a larger value moves the nozzle closer to the bed because what you are telling the machine is that the distance from the trigger point to the nozzle tip is greater and to get from the trigger point to Z=0 it must move further. In your case, if you set a positive offset, you are telling the machine that it must move the nozzle closer to the bed after it sees the trigger point but in your case, the trigger point happens after the nozzle touches the bed so Z=0 is in the opposite direction.

          Edit. Having re-read that, it seems clear as mud - just try it and see.

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

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          • DjDemonDundefined
            DjDemonD
            last edited by

            Well I am trying it Ian. I've been printing with a positive offset and a piezo probe hotend for a few weeks now. I've just fitted Lykle's latest effector/probe combo, so all bets are off until I've had a bit of chance to test this version.

            I know you're putting forth sound theory but my experience has been I need to use a positive offset (which I apply in my slic3r rather than in Duetwifi config).

            Simon. Precision Piezo Z-Probe Technology
            www.precisionpiezo.co.uk
            PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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            • deckingmanundefined
              deckingman
              last edited by

              Sorry DJ, no offence meant. It sounds arse about face to have to do that but if it works for you, then fine. Maybe slic3r works the opposite way to Duet config? Dunno…...

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

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              • dc42undefined
                dc42 administrators
                last edited by

                @DjDemonD:

                Well I am trying it Ian. I've been printing with a positive offset and a piezo probe hotend for a few weeks now. I've just fitted Lykle's latest effector/probe combo, so all bets are off until I've had a bit of chance to test this version.

                I know you're putting forth sound theory but my experience has been I need to use a positive offset (which I apply in my slic3r rather than in Duetwifi config).

                If you have to add a positive Z offset in your slicer, this indicates that you need a lower (I.e. more negative) trigger height in your G31 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

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                • Dougal1957undefined
                  Dougal1957
                  last edited by

                  I think that is probably the Difference

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                  • DjDemonDundefined
                    DjDemonD
                    last edited by

                    @deckingman:

                    Sorry DJ, no offence meant. It sounds arse about face to have to do that but if it works for you, then fine. Maybe slic3r works the opposite way to Duet config? Dunno…...

                    None taken its clear the way the offset is presented differs from the firmware to the slic3r, I wasn't aware of that, but given cognitive biases I am likely to see it everywhere from now on. 🙂

                    Simon. Precision Piezo Z-Probe Technology
                    www.precisionpiezo.co.uk
                    PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                    • dc42undefined
                      dc42 administrators
                      last edited by

                      The value in the G31 Z parameter is the probe trigger height, not an offset.

                      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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                      • DjDemonDundefined
                        DjDemonD
                        last edited by

                        A little update for the delta brigade, Lykle's latest effector design with less flexible piezo works and seems fairly reliable, we are just tweaking the design to make assembly more straightforward. But I think we are getting closer to having a solid system.

                        Next steps:
                        -try a 20mm piezo to see if we can make a smaller overall unit.
                        -Make a version for i3 style printers (since they are the most popular design) I don't have one anymore so I will need some help with that.
                        -I have got a piezo sensor working now on Duet/RRF, Marlin/Ramps and now Re-Arm/Smoothie (in fact it works really well on Smoothie as setting < zprobe.debounce_ms 1> for z probe means I can probe at full speed). Is there anything like this on RRF David? This practically eliminates false triggers - I don't know how this works but it seems to work very well with this probe.
                        -See if there is a way to reduce the chance of wire-breaks on the piezo unit itself, the leads are very thin and desolder easily.

                        Simon. Precision Piezo Z-Probe Technology
                        www.precisionpiezo.co.uk
                        PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                        • dc42undefined
                          dc42 administrators
                          last edited by

                          You can adjust the debounce time by adjusting the threshold in the G31 P parameter. Lower values give lower debounce times.

                          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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                          • Moriquendiundefined
                            Moriquendi
                            last edited by

                            New boards have arrived and are made up, I'm currently testing them and they should be ready to post early next week.

                            Of the the first batch of 12 I've sent out 10 and donated I think £55 to the charity. Unfortunately I'm not in a position to keep doing that, I had to buy more parts to make the new batch and the boards are larger and more expensive so now I'm going to be selling them. If you've already been told that the money is going to the charity then that is where it will go but in the interests of transparency, from this point on, the money is going in my pocket.

                            I will be writing up documentation (hopefully this weekend) and I will publish that free for anyone to use.

                            I didn't foresee the demand for these boards so I only ordered six this time, I think three or four are already spoken for. I'll be ordering more asap.

                            I've previously discussed a piezo endstop handling board, they are also made up and being tested and will be ready to post next week to beta testers.

                            Idris

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                            • DjDemonDundefined
                              DjDemonD
                              last edited by

                              Idris. That's great news. I think it might be a good idea to possibly start a wiki page on reprap for this system as it is coming together nicely, and all the relevant information such as how to use the board and how to assemble the units would be well placed.

                              David - I will experiment with this. I have been setting the P parameter dependant on the analogue value but it might be worth revisiting the digital setup as it does seem to work extremely well on smoothie as a digital sensor with 1ms debounce.

                              Simon. Precision Piezo Z-Probe Technology
                              www.precisionpiezo.co.uk
                              PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                              • DjDemonDundefined
                                DjDemonD
                                last edited by

                                Okay so this is the current incarnation of the sensor mounted in Lykle's latest effector system (which will be able to have a Nimble extruder bolted straight on - or just used with your current Bowden/flying extruder):

                                Nozzle wobbly practically non-existent and calibrating to a 0.02 precision over a 330mm bed.

                                Simon. Precision Piezo Z-Probe Technology
                                www.precisionpiezo.co.uk
                                PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                                • DjDemonDundefined
                                  DjDemonD
                                  last edited by

                                  I have the stl's for this effector now on my thingiverse. Lykle will publish it also (with step files) if anyone needs to edit it to suit their setup. Please feedback to us on how you are getting on with it, any additions and improvement you make as well.

                                  http://www.thingiverse.com/thing:2069480

                                  Simon. Precision Piezo Z-Probe Technology
                                  www.precisionpiezo.co.uk
                                  PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                                  • Dougal1957undefined
                                    Dougal1957
                                    last edited by

                                    DJ did you get his larger one I sent you you will need that to go with the Alloy carriages that I am getting cut it has a hole to take the Bardair cooling tube integrated into it (Reminder to self to order a bardAir system)

                                    Doug

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                                    • DjDemonDundefined
                                      DjDemonD
                                      last edited by

                                      Thanks Doug, I did get it yet. I will reprint and upgrade the effector when the carriages are in. I am looking forward to that.

                                      Simon. Precision Piezo Z-Probe Technology
                                      www.precisionpiezo.co.uk
                                      PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                                      • DjDemonDundefined
                                        DjDemonD
                                        last edited by

                                        This seems to be a nice way to use the probe for automatic perfect first layers:
                                        https://www.duet3d.com/forum/thread.php?id=940

                                        Simon. Precision Piezo Z-Probe Technology
                                        www.precisionpiezo.co.uk
                                        PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                                        • Zesty_Lykleundefined
                                          Zesty_Lykle
                                          last edited by

                                          Yes, DJDemonD did a great job there, getting it done.

                                          I published the designs on our Thingiverse page as well. http://www.thingiverse.com/thing:2117069
                                          Included is a 64mm wide effector and a Prism effector, which is the standard Kossel type width, but pretty looking. (I think)

                                          All three effectors already have holes in them for a Bard-air type cooling pipe.

                                          Lykle
                                          Design, make and enjoy life

                                          Co Creator of the Zesty Nimble

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                                          • Moriquendiundefined
                                            Moriquendi
                                            last edited by

                                            I'm writing up documentation for these new boards, does anyone know whether the inputs of the Duet are 5V tolerant?

                                            Idris

                                            Edit: Tuning instructions for the Z-probe v2 board are here https://www.dropbox.com/sh/3q38ew98kt7f8sq/AAB_uA6tQL2ETlGcnfdijm2Ra?dl=0, feedback would be very welcome, particularly from anyone whose using a v1 board.

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