10 Replies Latest reply on Dec 23, 2013 10:09 PM by Bernie Daraz

# How to measure the largest distance of an arc?

I have imported the iges file to solidworks 2013. One of the holes is outlined by an arc as shown above.

How can I measure the largest distance of this arc?

Since it is not a perfect circle, I can't measure the radius/ diameter instead.

Thanks.

• ###### Re: How to measure the largest distance of an arc?

You can draw a circle using the perimeter circle option and by picking the 3 points you'll get the circle. Then you can measure the size as required.

• ###### Re: How to measure the largest distance of an arc?

Actually i think it is a part of an ellipse instead of a circle.

So how can i measure the "ellipse diameter"?

• ###### Re: How to measure the largest distance of an arc?

Same way, create ellipse instead and measure that

• ###### Re: How to measure the largest distance of an arc?

i have tried to draw a ellipse.

but i can't accurately find the center of it

i expect the center will automatically shown. (i have checked the relations option)

i don't know if it is the limitation of an iges file.

• ###### Re: How to measure the largest distance of an arc?

Did you tried Point to Point option in the measure command.

• ###### Re: How to measure the largest distance of an arc?

Can you post the model? I believe I have a way to find out the largest overall size of any 2D shape you can think of.

• ###### Re: How to measure the largest distance of an arc?

Sorry, i can't post it because of some privacy rule of my company......

• ###### Re: How to measure the largest distance of an arc?

Just create a sketch, convert the entities and post only that sketch. I will try to provide the largest overall size of that sketch.

• ###### Re: How to measure the largest distance of an arc?

Unfortunatly, the "Maximim Distance"  in Solidworks measuring tool does not work. But the "Minimum Distance" does. Create 2 planes parallel to the straight edges and to a distance that is outside the elipse. Measure from each plane to the arc using "minimum distance".

Once you get your (2) numbers you can do the math to get your dimension. (distance between planes-1st measurement-2nd measurement=your dimension)

This is assuming the shape is symetrical about the (2) straight edges.

• ###### Re: How to measure the largest distance of an arc?

Looks like the surface, edge radius is giving you problems, have you considered 'cutting' the part halfway through the material thickness to get a raw, sharp edge. Another way to find the center is to Sketch a Center Rectangle and make the corners Tangent to the edge of the circle.