Spiral staircase

[emil.rindell]

Hi,

Just wondering if anyone got any ideas how to create this shape in a smarter way.

My first try was to use 3D curve helix and sweep the shape, but I got various results and are having trouble to control and allign the sketch correctly against the guidecurve. My second try was a uglier solution with creating a Thread Feature and removing the cylinder with a negative cylinder like this:

https://www.dropbox.com/s/zwxnejs3u7iw38k/Thread.mp4?dl=0

Any ideas?

 

 

[Cary OConnor]

Here is one example:

[jolizon590016]

thumbs up Cary

[David Greene]

Trying Cary's way atm and works perfectly although is there an easy way of defining the width of the  stringer ? say, as a 300 mm band ? 

[Josh]

15 hours ago, David Greene said:

Trying Cary's way atm and works perfectly although is there an easy way of defining the width of the  stringer ? say, as a 300 mm band ? 

To do that move the curve exactly 300mm when offsetting with the TriBall. Or for more customizability, just use one curve and do a sweep with a rectangular profile at the front, that will allow you to easily adjust the sweep profile to any dimension, and also control the size with a parameter if desired.

To align the profile, do a sketch "Normal to Face at Point", with the point being the end of the curve, and the face being the front of the step.

Edited October 12, 2020 by Josh

[David Greene]

Hi Josh - Thank you although i am clearly doing something wrong - found loads of ways it doesnt work out lol

Could you clarify further for me ? - apologies from a novice

Thank you in advance

[Josh]

8 hours ago, David Greene said:

Hi Josh - Thank you although i am clearly doing something wrong - found loads of ways it doesnt work out lol

Could you clarify further for me ? - apologies from a novice

Thank you in advance

Hi David,

Here's a video for you: 

 

[David Greene]

What an Absolute Star - Thanks