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BillMazza
Posts: 119
Registered: ‎09-26-2011
Message 1 of 6 (157 Views)
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Patterning

157 Views, 5 Replies
05-17-2012 06:46 AM

I want to pattern some rollers against a side frame. So I have the feature selected, the spacing, and I clicked on 'curve length' so it will adjust when I change the overall length of the frame. However, it will also change the spacing of the feature as well.

 

Do I need to develop a parameter formula, that will go the distance of the length of the frame, while maintaining the same spacing in between rollers, rather than spacing them out?

 

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Curtis_Waguespack
Posts: 2,780
Registered: ‎03-08-2006
Message 2 of 6 (149 Views)

Re: Patterning

05-17-2012 07:12 AM in reply to: BillMazza

Hi BillMazza, 

 

Attached is an example of a pattern that holds the spacing and adjusts the count when the length is changed. There are two parameter formulas employed to make the magic happen. This example is included in the Mastering Inventor book along with a couple of other variations, so I had it handy. But I understand you're wanting to do this in an assembly file. I think this should give you an idea of how to do the same in an assembly though.

 

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com




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Distinguished Contributor
BillMazza
Posts: 119
Registered: ‎09-26-2011
Message 3 of 6 (134 Views)

Re: Patterning

05-17-2012 11:06 AM in reply to: Curtis_Waguespack

That works perfect, thank you.

 

One other thing, is there a way to copy over those formulas from Part to Part? I tried cut and paste, but it didn't work. So I just entered them manually, but these are formulas which I will be using again quite frequently.

 

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trumpy81
Posts: 317
Registered: ‎10-22-2006
Message 4 of 6 (119 Views)

Re: Patterning

05-17-2012 11:55 AM in reply to: BillMazza

Curtis, could you explain what the various elements of the formula actually mean and perhaps give some idea of when they should be used.

 

isolate(ceil(Adjust_Len / Spacing);ul;mm)

 

Some of the elements are fairly obvious but the rest don't have any meaning to me.

 

Also, is there a resource that covers the use of such formulas?

Regards
Andy M
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Curtis_Waguespack
Posts: 2,780
Registered: ‎03-08-2006
Message 5 of 6 (112 Views)

Re: Patterning

05-17-2012 12:51 PM in reply to: BillMazza

Hi BillMazza,

 

Most likely the copy paste failed bacause the parameter names used in the forumulas weren't in the part yet. Meaning that if you pasted in isolate(Length - End_Offset;ul;mm) but there is no parameter named End_Offset in the part, Inventor will reject it.

 

I sometime just use MS Word as a clipboard to edit the parameter names in first and then paste them into the new part.

 

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com


 



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*Expert Elite*
Curtis_Waguespack
Posts: 2,780
Registered: ‎03-08-2006
Message 6 of 6 (107 Views)

Re: Patterning

05-17-2012 01:03 PM in reply to: trumpy81

Hi trumpy81, 

 

Attached is a scan that explains the formulas used in that part.

 

And here is a link with the gereral information on parameter functions:

http://wikihelp.autodesk.com/Inventor_LT/enu/2012/Help/0041-Autodesk41/0463-Design_O463/Functions,_p...

 

 

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com




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