topic Circle without center point in Inventor Forum

Circle without center point

Anonymous — Tue, 27 Nov 2018 19:27:03 GMT

Firstly I'm a beginner with Inventor.

Let's say I want to make something similar to the picture I posted as attachment (it's weird, but I can't draw better in MS paint :)).

In 2D sketch, how do I make circle (or fillet) without knowing its center point? I know it's possible, but I don't remember how to do it.

Thanks

kelly.young has embedded your image for clarity.

Re: Circle without center point

Frederick_Law — Tue, 27 Nov 2018 16:25:05 GMT

In Inventor, you can draw the circle and then move it.

Better yet, you can constrain it other sketch.

Take a look at tutorials in help and learn how to sketch.

Re: Circle without center point

JDMather — Tue, 27 Nov 2018 16:31:50 GMT

What version of Inventor are you using?

If 2019 - I can make an example for you to examine.

I would create the ellipse and then make the circle tangent to the ellipse.

Add a Vertical constraint between the circle center point and the ellipse center point.

Re: Circle without center point

Anonymous — Tue, 27 Nov 2018 21:21:01 GMT

Yeah, I'm using 2019 version and I'd appreciate that example. But careful, it's not elipse, but halfs of two circles with radius 65 joined together. I'm mainly asking how to draw the big one ("egg"), not the small one inside.

Re: Circle without center point

johnsonshiue — Wed, 28 Nov 2018 00:01:01 GMT

Hi! You will need to draw arcs instead. To make the whole thing or stable (not subject to movement), you may want to create some vertical lines. It should be fairly straight forward. You need three arcs and one circle.

Many thanks!

Re: Circle without center point

IgorMir — Wed, 28 Nov 2018 01:52:18 GMT

Here it is. IV2018 file

Cheeers,

Igor.

@Anonymous wrote:

Firstly I'm a beginner with Inventor.

Let's say I want to make something similar to the picture I posted as attachment (it's weird, but I can't draw better in MS paint :)).

In 2D sketch, how do I make circle (or fillet) without knowing its center point? I know it's possible, but I don't remember how to do it.

Thanks

kelly.young has embedded your image for clarity.