topic Re: Finding an arc without a start/end/center in AutoCAD Forum

Finding an arc without a start/end/center

Anonymous — Sun, 16 Oct 2016 10:15:43 GMT

Hi there

I'm in my first year of mechanical engineering and I've been struggling with an assignment that was given to me. The objective is to recreate a part but I'm having an issue finding out how to get the perimeter arcs in place accurately. I've attached the diagram below.

The arc I can't find is the R44 on the top left and I can't find where the straight portion on the bottom left intercepts the R22 and R35. The two R16s I was able to get with a R16 fillet but that's not really an option for the other two.

Any ideas would be great

Thanks!

Re: Finding an arc without a start/end/center

Alfred.NESWADBA — Sun, 16 Oct 2016 10:25:11 GMT

Hi,

welcome @Anonymous.autodesk.com!

Look to the _CIRCLE option TTR (which stands for tangential-tangential-radius), after that use command _TRIM to remove the part of the circle which is not needed.

Good luck, - alfred -

Re: Finding an arc without a start/end/center

Anonymous — Sun, 16 Oct 2016 16:06:05 GMT

That worked perfectly! unfortunately that doesn't help with the straight line portion. Is there an easy way to find where that line intercepts?

Re: Finding an arc without a start/end/center

parkr4st — Sun, 16 Oct 2016 16:16:30 GMT

set the object snap to tangent only. draw the line to the tangent points of the curves