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    Barley Twist Spirals

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    • gillesG Offline
      gilles
      last edited by

      Sorry Dave, there are two starts and I could have done n starts in one shot.

      OFF TOPIC

      components plus profiles in one shot:


      Screw#2.png

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

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      • Dave RD Offline
        Dave R
        last edited by

        Pilou, you trot that video out every time someone asks how to draw anything. πŸ˜’ πŸ˜†

        That's not a barley twist either.

        Etaoin Shrdlu

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        • Dave RD Offline
          Dave R
          last edited by

          @gilles said:

          Sorry Dave, there are two starts and I could have done n starts in one shot.

          Show the setup. And which version of Screw are you using.

          Etaoin Shrdlu

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          • gillesG Offline
            gilles
            last edited by

            screw1_5.rb.

            select 3 profiles (in the following case), set start point, set end point, enter n steps n turn and go.


            3entry.png

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

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            • Dave RD Offline
              Dave R
              last edited by

              Thanks. that should help the OP.

              Isn't it great there are usually multiple ways to arrive at the same point in SketchUp?

              And you finally drew a barley twist. πŸ˜‰ Here's a cutter profile for that.

              http://ecx.images-amazon.com/images/I/31uqkUSlwNL.jpg

              Etaoin Shrdlu

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              • GaieusG Offline
                Gaieus
                last edited by

                @dave r said:

                Pilou, you trot that video out every time someone asks how to draw anything. πŸ˜’ πŸ˜†

                That's not a barley twist either.

                True but otherwise a brilliant solution!

                (I could imagine Kito Raupp is Pilou himself in a humble disguise)
                πŸ˜†

                Gai...

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                • gillesG Offline
                  gilles
                  last edited by

                  Here is a step by step.


                  profile


                  follow me around the circle


                  erase unwanted


                  intersect


                  erase unwanted


                  select the two profiles (center must be on blue axis at origin) run screw plugin


                  cut  unwanted whit zorro plugin


                  intersect


                  erase unwanted

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

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                  • A Offline
                    archturn
                    last edited by

                    @gilles said:

                    Made in one shot with screw1_5.rb.

                    AND it works also with components.

                    This is what we call a rope twist not a barley twist. The barley twist has another (interior) radius. The rope twist looks like rope - though your method may work for a barley twist as well. David R's is definitely a barley

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                    • Dave RD Offline
                      Dave R
                      last edited by

                      @gilles said:

                      Here is a step by step.

                      Nice rope twist. πŸ˜‰

                      Etaoin Shrdlu

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                      • A Offline
                        archturn
                        last edited by

                        Dave R
                        Love your solution but I need to fit it to the other part of my newel. Gilles method looks like it will work. In CAD I'll usually do a sweep of the newel profile then draw my barley twist profile - sweep the barley profile with the correct pitch then subtract it from my newel sweep. I wish I could do it this way (specifically the subtract function) in SU since this yields the most realistic geometry - though again Gilles looks pretty right (just needs more interior radius to be classified as a true barley twist). Thanks

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                        • gillesG Offline
                          gilles
                          last edited by

                          Its up to you to create the good profile. πŸ’š

                          You can also do this with screw:


                          conic.png

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

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                          • Dave RD Offline
                            Dave R
                            last edited by

                            archturn, you could use the method I showed and create the transitions when you've finished. There isn't any reason you couldn't fit it to the rest of the turning. I did on the table legs. The transitions are similar to creating the pommels which I've showed in several other blog posts so I didn't bother with them in that one. The Screw plugin is nice, too. although you can do multiple starts the way Gilles shows, I would still make a single turn as a component and copy it as I did in the blog to keep file size down and make it easier to adjust the length.

                            Etaoin Shrdlu

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                            • gillesG Offline
                              gilles
                              last edited by

                              @dave r said:

                              archturn, you could use the method I showed and create the transitions when you've finished. There isn't any reason you couldn't fit it to the rest of the turning. I did on the table legs. The transitions are similar to creating the pommels which I've showed in several other blog posts so I didn't bother with them in that one. The Screw plugin is nice, too. although you can do multiple starts the way Gilles shows, I would still make a single turn as a component and copy it as I did in the blog to keep file size down and make it easier to adjust the length.

                              Totally agree with this. πŸ‘

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

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                              • charly2008C Offline
                                charly2008
                                last edited by

                                Hi,
                                here are two more options


                                1.jpg


                                3.jpg


                                2.jpg

                                He who makes no mistakes, makes nothing

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                                • A Offline
                                  archturn
                                  last edited by

                                  I can see that I should have been visiting the forum more frequently instead of pulling my hair out. Awesome!!!

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                                  • Dave RD Offline
                                    Dave R
                                    last edited by

                                    Yes. You should have. πŸ˜‰ And as I wrote before, there's more than one way to arrive at the final result in SketchUp. This is a great example.

                                    Etaoin Shrdlu

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                                    • A Offline
                                      archturn
                                      last edited by

                                      @charly2008 said:

                                      Hi,
                                      here are two more options

                                      Charly
                                      I'm wondering how to use the "follow me keep" plugin". I installed it and though it shows up in my plugin menu nothing seems to happen when I click it.

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                                      • massimoM Offline
                                        massimo Moderator
                                        last edited by

                                        You have first to select both the path and the face and then run the plugin.

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                                        • gillesG Offline
                                          gilles
                                          last edited by

                                          Just a question: why use two plugins instead of one which does very well the job?

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

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                                          • A Offline
                                            archturn
                                            last edited by

                                            @gilles said:

                                            Just a question: why use two plugins instead of one which does very well the job?

                                            I'm going to try them all. I remeber some time back trying the "draw helix" without the "follow me keep" tool. That was one of the times I gave up. The result from using the native "follow me" is pretty ugly so I thought I would see what this tool was all about.
                                            Again, I wasted a lot of time by not coming here first.

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