Need to Scale Ellipse in x direction Only

[JamesCarr1956]

I have a block with an attribute that contains an ellipse. When the text/attribute gets too long, I want to stretch or scale the ellipse so the Y distance stays the same, only the X distance will change. So far i have tried to use the XY parameter, the linear parameter and others to no avail. It always changes both X and Y. I tried creating a block inside the dynamic block hoping to use a constant scale but it did not work as well. When you select a grip on the block itself, it works. How do i get it to do what i need it to do?

[Libbya]

I do not know of a way to scale ellipses in the single direction.  The issue has come up before.  Here's a technique/block I developed a while ago.  It uses splines to simulate an ellipse.  It is not actually exact but darn close as you can see by the blue superimposed on the white ellipses.  

[j.palmeL29YX · Accepted solution]

Something like this? (see attached dwg)

cadder

[JamesCarr1956]

That IS pretty darn close. Thanks for your response. I will try and use this in my block. What about the block? If I make it as a block inserted, can I just scale it on the X axis and still keep it as an ellipse?

[JamesCarr1956]

Thanks to all. I like both responses. I tried the restraint, but not the way you have it. Not sure why I did not see that. DOH!

[j.palmeL29YX]

... and here a little better (IMO):

[some minutes later]: my final suggestion in ...new2.dwg

cadder

[Libbya]

I had tried that before, by attempting to individually add the coincident constraints and they will not work with ellipses (only the center point shows up).  I had not tried using auto-constrain.

You should add a gripless linear dimensional constraint to the Y axis in order to prevent it from changing.  

[j.palmeL29YX]

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@Libbya  schrieb:

You should add a gripless linear dimensional constraint to the Y axis in order to prevent it from changing.  

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There IS a Rotated Dimension (DCLinear -> d1) to hold the vertical stable. In the block editor start DCDISPLAY an pick the vertical construction line to turn the visibility ON. 

But thanks for your attention, though.

cadder