Inventor General Discussion

Inventor General Discussion

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Registered: ‎11-16-2011
Post 1 of 7

Incomplete part update when sketch pattern count changes

217 Views, 6 Replies
03-18-2012 05:23 PM

The attached part, created in Inventor 2012, has a formula for the number of occurances in a sketch pattern based on its length. When this number changes due to a length change, some parts of the sketch do not reposition and Inventor does not indicate that an update is required. The part can be fixed by dragging the affected geometry or performing a rebuild all. The following image shows the result when the length changes from 300 to 500.

 

ProjectedPoints.jpg

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Post 2 of 7

Re: Incomplete part update when sketch pattern count changes

03-19-2012 07:04 AM in reply to: cadull_rb

I don't suggest that you use patterns in sketches for this very reason (amongst many!).

 

It is much more stable to pattern features in parts, or parts in assemblies.

 

Would you like to tell us a little more about your workflow, so that we can make some suggestions?

 

Paul

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Valued Contributor
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Registered: ‎11-16-2011
Post 3 of 7

Re: Incomplete part update when sketch pattern count changes

03-19-2012 11:05 PM in reply to: PaulMunford
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Post 4 of 7

Re: Incomplete part update when sketch pattern count changes

03-20-2012 04:48 AM in reply to: cadull_rb

learnt to use ceil from here.

 

After change the Length, I tried put = in front of ceil(length/100) and press Enter, the drawing is fine then.

 

through don't know it was not right at the first place.

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Post 5 of 7

Re: Incomplete part update when sketch pattern count changes

03-22-2012 06:53 AM in reply to: cadull_rb

Have you tried the frame generator?

 

 

CSO

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Post 6 of 7

Re: Incomplete part update when sketch pattern count changes

03-22-2012 06:58 AM in reply to: cean_au

This may be a units issue. Check your document units against the units you inputted and the units you actually want.

 

Don't forget that 100mm is not the same as 100ul. Some parameter require avalue in ul. If you feed in a value that is in mm, Inches or anything elese you won't get the value you were looking for.

 

Check out the isolate function as well:

 

isolate(expr;unit;unit)


http://beinginventive.typepad.com/being-inventive/2011/11/using-isolate-in-parameter-equations.html

 

http://wikihelp.autodesk.com/Inventor/enu/2012/Help/0073-Autodesk73/0733-Design_O733/Functions%2c_pr...

CSO

The CAD Setter Out Blog @CadSetterOut

Inventor Surfacing | AutoCAD | CAD Standards

Please use the Mark Solutions! Accept as Solution or Give Kudos! Kudos functions - Thank you!
Valued Contributor
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Registered: ‎11-16-2011
Post 7 of 7

Re: Incomplete part update when sketch pattern count changes

03-22-2012 03:31 PM in reply to: PaulMunford

It has been a while since I tried frame generator (using Inventor 2011). At the time I found the workflow to be fairly slow, positioning the structural members on alternate sides of a sketch so they overlap back to back and offsetting the ends to complete the lap or allow for a bracket. I also had trouble updating the component in content centre without breaking existing usage. The way frame generator handles end offsets also added complexity for our addin to handle hole punching.

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