Barley Twist Spirals
-
I'm probably an intermediate user. I'm fine with using plugins. I've looked in vain though to find one that will help
-
-
screw.rb can make this pretty well and fast. But I bet the geometry created by Dave's method would be nicer.
-
@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.
-
Made in one shot with screw1_5.rb.
AND it works also with components.
-
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.
This is a three-start barley twist. -
the new classic
-
Sorry Dave, there are two starts and I could have done n starts in one shot.
OFF TOPIC
components plus profiles in one shot:
-
Pilou, you trot that video out every time someone asks how to draw anything.
That's not a barley twist either.
-
@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.
-
screw1_5.rb.
select 3 profiles (in the following case), set start point, set end point, enter n steps n turn and go.
-
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.
Here's a cutter profile for that.
-
@dave r said:
Pilou, you trot that video out every time someone asks how to draw anything.
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)
-
Here is a step by step.
-
@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
-
-
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 -
Its up to you to create the good profile.
You can also do this with screw:
-
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.
-
@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.
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better π
Register Login
Advertisement