Creating an Ellipse using sketcher?
Creating an Ellipse using sketcher?
(OP)
Hi All,
What would you consider to be the best method for creating an Ellipse which I can control the parameters for?
Regards
What would you consider to be the best method for creating an Ellipse which I can control the parameters for?
Regards
Mark Noyce
Senior Design Engineer/CAD co-ordinator





RE: Creating an Ellipse using sketcher?
I've been in this boat a number of times.
Normally what I do is create a rectangle where the length and width are twice the semimajor and semiminor dimensions of your desired ellipse. The length and width can be controlled by a sketch dimension or an expression.
Then create your ellipse and constrain it so that it is tangent to all 4 sides of the rectangle.
Hope this helps.
ugdriver
Mama's don't let your children grow up to be aerospace tool designers...
RE: Creating an Ellipse using sketcher?
Another way would be to create lines from quadrant points to center of the ellipse and make the lines reference and constrain/dimension as needed.
Tim Flater
Senior Designer
Enkei America, Inc.
www.enkei.com
Some people are like slinkies....they don't really have a purpose, but they still bring a smile to your face when you push them down the stairs.
RE: Creating an Ellipse using sketcher?
Mark Noyce
Senior Design Engineer/CAD co-ordinator
RE: Creating an Ellipse using sketcher?
Specialty Engineered Automation (SEA)
http://www.sea4ug.com
a UGS Foundation Partner
RE: Creating an Ellipse using sketcher?
John R. Baker, P.E.
Product 'Evangelist'
NX Product Line
SIEMENS PLM Software Inc.
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/
RE: Creating an Ellipse using sketcher?
I have 2 planes at an angle.
I sketch a circle on one, controlling the dia.
I project the circle onto the second plane which creates an ellipse.
The ellipse is controlled by the angle and the maj dia.
I also go one step further and perform a join curves on the projection to make it a spline as ellipses aren't the best in UG.
So many ways to skin a cat....
Mark Benson
Aerodynamic Model Designer
RE: Creating an Ellipse using sketcher?
In UG it's very easy to control ellipses by this method and fewer entities are required. Also you get the ability to control angle of the ellpse Pro/E makes you sketch your section at an angle because it controls ellipses by Rx and Ry which is very restrictive. The workaround is to sketch and mirror conic arcs which is how ellipses were created in older versions of the software.
John what version of UG were Ellipses first included as an entity type?
Michael
RE: Creating an Ellipse using sketcher?
If you meant as an object supported in the sketcher, I think it has been supported since V13.0 (released July, 1997).
As for supporting the Ellipse as a regular curve object, that goes back a lot further, all the way to UGI, at least to the early 80's.
John R. Baker, P.E.
Product 'Evangelist'
NX Product Line
SIEMENS PLM Software Inc.
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/
RE: Creating an Ellipse using sketcher?