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    Linear Z Alongside Delta Z movement?

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    • kraegarundefined
      kraegar
      last edited by

      I've been toying with this idea for a while, of being able to implement a single stepper that moves in a linear Z, so there would be a belt drive to lift a small platform for holding a webcam (and/or cooling fan) to match the Z-Height of my delta. Endtop would be at the bottom, a simple 80steps/mm, and wouldn't need to be terribly precise.

      Is something like this possible to implement currently?

      Co-Creator of the RailcoreII CoreXY printer
      https://www.thingiverse.com/thing:2407174

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      • TitanOneundefined
        TitanOne
        last edited by

        I don't know much about Firmware writing and stuff, but if you're using the IP-Camera function of the Duet (Wifi or Ethernet or where it is implemented), then you would need a friggen' lightweight IP-Camera (or a webcam connected to a RasPi, which is connected to the network as a IP-Camera), which then would need to be implemented in the Duets Firmware, or if you're using Octoprint on a Pi with a Webcam, there would need to be kindof a Plugin for Octoprint to recognize the cameralift (or how you will name it).

        Paranoia, Anxiety and Insanity incarnate.

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        • dc42undefined
          dc42 administrators
          last edited by

          This ties in quite nicely with a suggestion here http://forums.reprap.org/read.php?416,761560 to be able to drive an additional Z motor to support an extruder drive. I'll add it to the wish list. Most likely I will implement it as an additional delta tower with a separately-configured diagonal rod length. If you configure a very long rod length, then it will hardly move when the effector moves in the XY plane, and just track Z.

          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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          • Russ Griesundefined
            Russ Gries
            last edited by

            oh yeah, so this could be used for a " flying" extruder, but instead of being right above the endefector, you could make it on the side. hummm.

            ~Russ

            One Day At A Time…
            My Main Research Page:
            http://rwgresearch.com/open-projects/3d-printing-research/

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            • kraegarundefined
              kraegar
              last edited by

              A flying extruder / short bowden is exactly what I was thinking. I've experimented using a pi, but rapid z movement is a dangerous thing if doing it externally if you're going to attach a bowden to your hotend. Glad to see some interest in it.

              Driving it as a separate delta tower sounds like a good lightweight solution.

              Co-Creator of the RailcoreII CoreXY printer
              https://www.thingiverse.com/thing:2407174

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              • Russ Griesundefined
                Russ Gries
                last edited by

                you know though, you could just attache it to one of the rail slides. but then you need to worry about fast movies..

                I use a flying extruder. could be one of the first ( was back in 2014) I'm not sure but what i have learned is that the closer the extruder / hotend the better. as most of us know…

                I even went so far as to have a counter weight on the extruder...

                you can kinda see it here :

                I think if i did such a thing I would use it for a camera or something. It should be straight forward to implement to fallow Z. but think about the "Z hop" moves… it would need to ignore those! lol

                I like the camera idea because currently i have a nice setup for close up cam. but no good options for a side cam. It just sits over there looking cool...
                and i have to move it manually
                https://youtu.be/AKm7pzUGT1w?t=542

                ~Russ

                One Day At A Time…
                My Main Research Page:
                http://rwgresearch.com/open-projects/3d-printing-research/

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                • Russ Griesundefined
                  Russ Gries
                  last edited by

                  another showing that close up https://youtu.be/d-P-yzbNBMI?t=562

                  One Day At A Time…
                  My Main Research Page:
                  http://rwgresearch.com/open-projects/3d-printing-research/

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                  • kraegarundefined
                    kraegar
                    last edited by

                    I played with flying extruders, but couldn't find a way to implement them that didn't add tilt.

                    I'd rather deal with the headaches of a bowden than the effects of tilt… though some days I reconsider 🙂

                    Co-Creator of the RailcoreII CoreXY printer
                    https://www.thingiverse.com/thing:2407174

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                    • DjDemonDundefined
                      DjDemonD
                      last edited by

                      I've been flying extruders since 2015 and never had an issue I have a duel extruder flying now which maybe added a bit of inertia initially but oddly this doesn't seem to manifest now, I probably changed acceleration down a tad. Never seen them contribute to tilt. A motorised tracking extruder lift/camera platform would be quite a cool feature.

                      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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                      • kraegarundefined
                        kraegar
                        last edited by

                        Perhaps my bowden was too short, but then if I made it longer the extruders just kind of balanced on the bowden. But with how I had them, it changed the tilt of my effector. I can re-test now that I have a digital method to measure. Before I noticed it by using the mini IR probe, and checking the trigger height offset at various points. I noticed the trigger heights changed if I totally disconnected the flying extruder vs. having it on my printer. (it also changed the measurements from the seemecnc accelerometer probe some, too)

                        Co-Creator of the RailcoreII CoreXY printer
                        https://www.thingiverse.com/thing:2407174

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                        • Russ Griesundefined
                          Russ Gries
                          last edited by

                          @kraegar:

                          Perhaps my bowden was too short, but then if I made it longer the extruders just kind of balanced on the bowden. But with how I had them, it changed the tilt of my effector. I can re-test now that I have a digital method to measure. Before I noticed it by using the mini IR probe, and checking the trigger height offset at various points. I noticed the trigger heights changed if I totally disconnected the flying extruder vs. having it on my printer. (it also changed the measurements from the seemecnc accelerometer probe some, too)

                          to deal with tilt i just place my nozzle at the correct height where any tilt in any direction dose not deflect the nozzle tip… ( this means mechanically moving the hotend to the right height )

                          ~Russ

                          One Day At A Time…
                          My Main Research Page:
                          http://rwgresearch.com/open-projects/3d-printing-research/

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