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    Elliptic Gears

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    • GaieusG Offline
      Gaieus
      last edited by

      @gilles said:

      Component Stringer could help.

      http://sketchucation.com/forums/viewtopic.php?f=79&t=48477&hilit=component+stringer#p435378

      Component stringer AND Ddider's ellipse plugin: http://rhin.crai.archi.fr/rld/plugin_details.php?id=124
      as it makes ellipses with equal segments.

      Gai...

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      • Jean LemireJ Offline
        Jean Lemire
        last edited by

        Hi enhydra, hi folks.

        In your image, you show two small circular gears meshed with a larger elliptical one.

        For this to work, you need a way to accomodate changes in axis distance.

        Normally, elliptical gears are meshed with other elliptical gears.

        See this web page for some formula:

        http://www.technicaljournalsonline.com/ijaers/VOL%20II/IJAERS%20VOL%20II%20ISSUE%20I%20%20OCTBER%20DECEMBER%202012/225.pdf

        You will see that defining the exact shape for the teeth is not so simple.

        Just ideas.

        Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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        • pilouP Offline
          pilou
          last edited by

          Even not elliptical gears are no so simple too πŸ˜„
          38 parameters! πŸ€“


          gears.jpg

          Frenchy Pilou
          Is beautiful that please without concept!
          My Little site :)

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          • Jean LemireJ Offline
            Jean Lemire
            last edited by

            Hi Pilou, hi folks.

            You are right. Imagine with square gears. Yes, they exist.

            See this page:

            Link Preview Image
            Non-circular gear - Wikipedia

            favicon

            (en.wikipedia.org)

            And this one for even more strange looking shapes for gears. Look for the fish shaped one at mid length. Really funny.

            Just ideas.

            Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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            • E Offline
              enhydra
              last edited by

              @gilles said:

              Component Stringer could help.
              http://sketchucation.com/forums/viewtopic.php?f=79&t=48477&hilit=component+stringer#p435378

              Thanks for replying πŸ˜„

              @gilles & by Gaieus: I will take a look at these two plugins. Hope they do the job. πŸ‘

              @Jean Lemire:

              @unknownuser said:

              you need a way to accomodate changes in axis distance

              Yes, I am aware of that. πŸ˜‰ Take a look at http://skfb.ly/5k3ecba. A rubber band will press the smaller gear towards the elliptic gear.
              You get the point: Dealing with gears is quite challenging. But

              @Pilou
              I am not bothered by all of the 38 parameters. πŸ˜‰

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              • pilouP Offline
                pilou
                last edited by

                Terrific gears indeed!
                And crazzy wood clocks 😲

                Frenchy Pilou
                Is beautiful that please without concept!
                My Little site :)

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                • E Offline
                  enhydra
                  last edited by

                  @unknownuser said:

                  Terrific gears indeed!
                  And crazzy wood clocks 😲

                  I wish I had a laser cutter in the basement. πŸ˜‰

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                  • PixeroP Offline
                    Pixero
                    last edited by

                    Kind of reminds me of the intro to the old Swedish TV show Tekniskt Magasin.

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                    • D Offline
                      driven
                      last edited by

                      you could reverse engineer this one...
                      11mb and v6
                      https://dl.dropbox.com/u/25114184/Clark_67.skp

                      edit forgot to add superelipse plugin may help http://sketchucation.com/forums/viewtopic.php?t=29061

                      learn from the mistakes of others, you may not live long enough to make them all yourself...

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                      • E Offline
                        enhydra
                        last edited by

                        Unfortunately the plugin "Compnent Stringer" won't work for this kind of problem. Especially if you are interessted in a proper solution. For makers and tinkerers the plugin and also my way are good enough. πŸ˜‰

                        Look at: http://www.thingiverse.com/thing;57771

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                        • gillesG Offline
                          gilles
                          last edited by

                          For those who enjoy fine mechanics:

                          http://kmoddl.library.cornell.edu/model.php?m=689&movie=hide


                          1357.jpg

                          " c'est curieux chez les marins ce besoin de faire des phrases "

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