# Thread: Help student create an Arc on Ellipse to Ogee Curve.

1. ## Help student create an Arc on Ellipse to Ogee Curve.

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Hello,
I'm a student taking a CAD class.
Using AutoCAD 2017.
The drawing I'm working on is basically of a wrench. An "S" curve wrench.
I used "Ellipses" to make the ends of the wrench and an "Ogee curve" to make the body of the wrench.
I need to make Arcs where the Ellipses meet the Ogee curve(s). Arcs with a radius of .25.
I don't know how to do this other than make R.25 circles out in space, then move them into place via eyeball, which isn't accurate.
If anyone can describe other ways to do this, I'd appreciate it.

Some more info:
The ellipses diameters: One is 1.25 minor and 1.63 major. The other is 1.38 minor 1.75 major.
Distance between Ellipses (width), from center to center is 4.12
Distance between Ellipses (height), from center to center is 2.00
The Ellipses are vertical.
Scale is 1:1 on a sheet size of 11 x 8 1/2 inches.

2. I have to be honest, I can't picture in my mind what you mean, but 2 alternative methods for creating curves at junctions of other geometry that I can think of, would either be the fillet command with a radius of .25 or use the offset command with a distance of .25 on the ellipse and the curve and this should give you the center point for the circle. If those don't help maybe you could post a dwg or an image to show what you are wanting to do.

3. Remember this trouble.

Create the arc using "tangent, tangent radius" to define position and size.

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Yeah the famous for over 30 years the "Fillet" command. One day Autodesk will fix it.

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