Hello, I'm new to the forum.
Here is my question:
I have to make a spiral staircase, to do this I draw a propeller and I want to do a repetition of the steps AND the railing posts.
It doesn't work very well.
Indeed, if I repeat the body (walking), it follows the propeller.
If I rehearse with a railing bar, the repetitions shift.
I've tried a lot of ways...
Hello @p.verthee
Happy to welcome you to the forum. 
I hope that we can help you solve some problems, but also that we can benefit from your knowledge and experience.
Your problem probably comes from a small mistake of carelessness because you have checked constant spacing instead of using the D1 distance which is 412.20 mm.
Indeed your spiral is higher
If you put constant space, it will use the length of the spiral (that's what makes you swarm)
If you set distance (constant space being unchecked) then it will use the spiral as the line for the curve and the distance for the spaces between the rungs.
Use the image settings and it will work perfectly
Kind regards
Thank you very much for the answer.
I'm going to try that right away.
Hello
Despite the " Constant Space" option checked in the repeat feature, SolidWorks does not use the full length of the propeller to distribute the steps.
Proof of this is the piece of propeller that protrudes from the last step in the upper part of the central pillar.
However, by selecting the two bodies in a single repeat function, the posts properly accompany the steps. But the staircase ends before the top of the central pillar.
A second attempt on a propeller defined on the outside of the staircase gives the correct result (in red). Go figure, Charles...
Kind regards.
COLIMACON 3.SLDPRT (1.9 MB)
Thank you for the answer.
I prefer to use "constant space" otherwise it's a hack to determine the height to fit.
It's been a long time since Solid has taken my head like this...
I hope that the solution I proposed to you satisfies you.
In any case with your file it took me two minutes
1 minute for diagnosis
1 minute to give the right interval odds.
That said, I always wedge the objects in relation to the beginning of the spline, which avoids a lot of problems as soon as you do things that are a little complicated. (example a central spiral staircase tube, like shooting plugs)
Kind regards
1° it distributes from a fixed point at the bottom
If you lengthened the spline by a few centimeters it would put you one more step.
If he sees that he can't put an extra object, then he doesn't put one because they are bodies. Not like holes where he doesn't mind putting half of a hole at the top or bottom.
Kind regards
