I made a circle in illustrator to do a test on my cnc using mach3. I imported a dxf into LazyCam bit it was an octagon. I imported a pct and it was a circle. I then saved the gcode to import into Mach3 but Mach3 only sees an arc. I am new to all this but it seemed that is should have worked.

Looks like the shape you imported was not a true circle but made up of small lines.  The reason for so many nodes/entities. Chances are good that Lcam saw a Break in one of those lines that it could not resolve and created the arc with what info it saw.

Just a thought, (;-) TP

I would strongly suggest that you use a vector based CAD program to draw your shapes or a CAM program that provides CAD / vector based drawing.
You may want to try setting the tolerance setting differently in LC and see what happens. Sorry, I  but don't  provide LC support for anything other than vector drawn files.
RICH

Looks like you have a demo of Mach3, which limits you to 50 lines of code from LazyCAM.

I just finished building my Joe's Hybrid 4x4 and was trying to test a couple of shapes to make sure it was moving correctly. If it could do a circle than I would feel confident that everything was tight. I haven't purchased any software yet because it's all very expensive and I don't want to make the right choice.

Thanks for the help. I am sure I will be back.

Here's a 24" diameter circle for you.

THANKS!!!!