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Spiral staircase

12 REPLIES 12
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Message 1 of 13
mattool2000
1637 Views, 12 Replies

Spiral staircase

Can anyone recommend a method of designing a spiral staircase
12 REPLIES 12
Message 2 of 13
JDMather
in reply to: mattool2000

Coil, and curve driven "Rectangular Pattern".

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Message 3 of 13
cean_au
in reply to: mattool2000

Just wondering if I could do it in an assembly?thx
Message 4 of 13
JDMather
in reply to: cean_au

Yes

Pattern Component using the part feature pattern.


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Message 5 of 13

Look at your stringer depths as well, the outside is travelling at a less steep angle so should be larger IMHO.  We made one once and I was forced to use the same sized stringers, when it got put togethe it looked funny because the vertical distance from the toe of the step to the top of the stringer was different

Stephen Gibson



View stephen gibson's profile on LinkedIn


Message 6 of 13
cean_au
in reply to: JDMather

If I have a cylinder part and a tread part. I want to the tread part pattern along a coil on the cylinder part.

 

Do this mean I need to create a feature pattern on the cylinder to show the position on the coil, then pattern the tread part on that feature patter? I'll try to make a hole feature pattern.

 

Thx

 

 

Message 7 of 13
JDMather
in reply to: cean_au

I think I have an example here

http://home.pct.edu/~jmather/skillsusa%20university.pdf

or here

http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf

 

You feature pattern could be mounting holes or simply a workpoint patterned on the coil.


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Message 8 of 13
cean_au
in reply to: mattool2000

I made a part with a sketchspline3d and arrayed a workpoint along it.

When I place this part in a assembly, all the points are there, but the array feature  is no where.

So, still can't array my tread along.

 

I have attached my part file. 2012 version.

 

Thanks for help

Message 9 of 13
JDMather
in reply to: cean_au

Your sketch is not constrained.

Your Rectangular Pattern is not set to Direction1 per the instructions.

Your part is named mycylinder, but I don't see any cylindrical geometry?


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Message 10 of 13
cean_au
in reply to: mattool2000

It's just a reference, so no real cylinder.

How to set the dir one? If I clike the curve and it is highlighted, the OK button is greyed out.No array.

If there is direction arrow after the click, is it mean I only acturally picked a point on that curve?

 

I must did something wrong with the array feature, so when the part is placed in an assembly, the array feature is  dropped.

 

thx

Message 11 of 13
JDMather
in reply to: cean_au

Check the documents I posted earlier and see if you can reproduce my examples.


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Message 12 of 13
cean_au
in reply to: JDMather

All you examples have a feature there which could be used.

The problem for me is that my feature in the part file is dropped by inventor when placing into an assembly.

Message 13 of 13
JDMather
in reply to: cean_au

Did you go to Modeling View in assembly? (post screen shot).


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