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    Barley Twist Spirals

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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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                                        • A Offline
                                          archturn
                                          last edited by

                                          @gilles said:

                                          screw1_5.rb.

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

                                          Could you elaborate on using screw1_5??

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                                          • gillesG Offline
                                            gilles
                                            last edited by

                                            Will do later, its late here in France and I should sleep.

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

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