Inventor General Discussion

Inventor General Discussion

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mattool2000
Posts: 9
Registered: ‎11-21-2008
Message 1 of 13 (738 Views)

Spiral staircase

738 Views, 12 Replies
11-21-2008 09:29 AM
Can anyone recommend a method of designing a spiral staircase
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JDMather
Posts: 28,253
Registered: ‎04-20-2006
Message 2 of 13 (738 Views)

Re: Spiral staircase

11-21-2008 09:33 AM in reply to: mattool2000
Coil, and curve driven "Rectangular Pattern".
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cean_au
Posts: 100
Registered: ‎07-11-2011
Message 3 of 13 (519 Views)

Re: Spiral staircase

03-08-2012 10:26 PM in reply to: mattool2000
Just wondering if I could do it in an assembly?thx
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JDMather
Posts: 28,253
Registered: ‎04-20-2006
Message 4 of 13 (508 Views)

Re: Spiral staircase

03-09-2012 03:33 AM in reply to: cean_au

Yes

Pattern Component using the part feature pattern.

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stephengibson76
Posts: 1,122
Registered: ‎08-01-2006
Message 5 of 13 (489 Views)

Re: Spiral staircase

03-09-2012 07:01 AM in reply to: mattool2000

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



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cean_au
Posts: 100
Registered: ‎07-11-2011
Message 6 of 13 (463 Views)

Re: Spiral staircase

03-10-2012 06:15 PM 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

 

 

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JDMather
Posts: 28,253
Registered: ‎04-20-2006
Message 7 of 13 (451 Views)

Re: Spiral staircase

03-11-2012 06:50 AM 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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cean_au
Posts: 100
Registered: ‎07-11-2011
Message 8 of 13 (407 Views)

Re: Spiral staircase

03-12-2012 05:30 PM 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

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JDMather
Posts: 28,253
Registered: ‎04-20-2006
Message 9 of 13 (356 Views)

Re: Spiral staircase

04-26-2012 05:51 AM 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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cean_au
Posts: 100
Registered: ‎07-11-2011
Message 10 of 13 (323 Views)

Re: Spiral staircase

04-26-2012 04:41 PM 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

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