Autodesk Inventor

[#1]

Hi,

This is how I would do a simple symetric drawing ( see my symetric.bmp)

But how can wee make symetrics without any constraint lines ( see other symetric.bmp or other symetric ( with showen constraints).bmp

Thanks!

[#2]

Not sure I understand the question.
What is wrong with using construction lines (I use them for clarity even when they aren't technically needed)?

What version of Inventor are you using? 2010? 2011? 2012?

*.png image attachments would give the same information as *.bmp images but with much smaller file size.

[#3 · Accepted solution]

apply horizontal and vertical mid-point constraints with the origin.

[#4]

Use the centerpoint rectangle tool in Inventor 2013, or install Brian Hall's Rectangles add-on for previous versions of Inventor.  The thing I don't like about using the horizontal and vertical midpoint constraints is that they're not immediately obvious, and if you add a chamfer or fillet at a corner they shift the shape off center.

[#5]

Hmm..  I always considered construction lines as one's best friend.

About the only thing I wish Autodesk did with them is to allow a checkbox where you can tell Inventor

to [ Ignore Length Of Construction Entities ]   [ ]

Gets annoying to have an otherwise perfect sketch, yet still see the ( X number of dimensions needed ) on the bottom

just because the construction lines have floating ends.

[#6]

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acad-caveman wrote:

Hmm..  I always considered construction lines as one's best friend. 

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I agree.  I can't think when I last used a colinear constraint, for example; I use a construction line instead, because I can immediately see the intended constraint when I open the file three months later.

[#7]

it ok now.  I was just trying to find out how to draw symetric without using construction lines...

[#8]

Thanks!