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    Barley Twist Spirals

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    • A Offline
      archturn
      last edited by

      I'm probably an intermediate user. I'm fine with using plugins. I've looked in vain though to find one that will help

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      • Dave RD Offline
        Dave R
        last edited by

        This shows how I do them. And a couple of examples.


        http://farm4.staticflickr.com/3400/4632041011_06f915b614.jpg


        http://farm5.staticflickr.com/4020/4653175758_1c8f0707f8.jpg

        Etaoin Shrdlu

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        • pbacotP Offline
          pbacot
          last edited by

          screw.rb can make this pretty well and fast. But I bet the geometry created by Dave's method would be nicer.

          MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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          • gillesG Offline
            gilles
            last edited by

            @pbacot said:

            screw.rb can make this pretty well and fast. But I bet the geometry created by Dave's method would be nicer.

            ❓

            There is no reason, it depends of how many steps you type in the prompt window.

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

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            • gillesG Offline
              gilles
              last edited by

              Made in one shot with screw1_5.rb.

              AND it works also with components.


              Screw.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

                Gilles, yours shows a nice spiral or screw but that's not a barley twist. The barley twist consists of multiple starts. It is possible to make the barley twist with Screw, though.
                barley.png
                This is a three-start barley twist.

                Etaoin Shrdlu

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                • pilouP Offline
                  pilou
                  last edited by

                  the new classic πŸ˜‰

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

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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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