Inventor General Discussion

Inventor General Discussion

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Myles1
Posts: 33
Registered: ‎03-12-2012
Message 1 of 4 (114 Views)

problem with lofting rails-inv 2011

114 Views, 3 Replies
08-17-2012 06:16 AM

I have a fairly basic shim that I need to make, and I have my two sections set up (magenta in attached file), and 4 rails.  There seems to be a problem with one rail (orange in attached)  I have redrawn this sketch many times, many different ways, and is just won't work.  I can pick all other rails, but not that one.  I need all four rails to properly define this part.

Any ideas?

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JDMather
Posts: 28,254
Registered: ‎04-20-2006
Message 2 of 4 (109 Views)

Re: problem with lofting rails-inv 2011

08-17-2012 06:35 AM in reply to: Myles1

Sketch1 is not constrained and I would never use magenta (or pink) as that is how Inventor highlights "sick" geometry.

Sketch2 is not constrained and I would never use magenta (or pink) as that is how Inventor highlights "sick" geometry.

 

Sketch4 is not constrained and shows a really "strange" dimension when the arc is dimensioned.

 

Sketch5 shows a really "strange" unmanufacturable dimension when the arc is dimensioned.

 

Sketch6 missing Tangent constraint and arc dimension doesn't match Sketch4.

 

Sketch11  missing Tangent constraint and arc dimension doesn't match Sketch5.
Sketch11 is not connected to Sketch1.

 

You might want to reaed this document http://home.pct.edu/~jmather/skillsusa%20university.pdf

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Active Contributor
Myles1
Posts: 33
Registered: ‎03-12-2012
Message 3 of 4 (101 Views)

Re: problem with lofting rails-inv 2011

08-17-2012 06:54 AM in reply to: Myles1

Thanks, I'll take a look at the sketches.  There is a slight taper to this part that you may have missed.  That is why loft is being used.  (BTW the colors were only changed just for the purpose of making it easy to explain.)  It isn't something we generally do!

 

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JDMather
Posts: 28,254
Registered: ‎04-20-2006
Message 4 of 4 (97 Views)

Re: problem with lofting rails-inv 2011

08-17-2012 07:10 AM in reply to: Myles1

Myles1 wrote:

There is a slight taper to this part that you may have missed. 


 

Yes, I missed that originally and went back and edited my response.

 

I also noticed that if you use geometry constraints the only the line or the arc need be dimensioned - so pick the one that is the controlling factor (for manufacture and assembly).

 

I modeled it up from scratch - but I'm using a later release.

I am curious to see your true (dimensioned) design intent.

 

Also, are you aware that one of those faces won't be planar?

 

Lofted Shim.png

 

Please mark this response as "Accept as Solution" if it answers your question.
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Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015-SP1 64-bit
http://www.autodesk.com/edcommunity
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