At 03:27 PM 3/24/2010, you wrote:
>Ries van Twisk wrote:
> > The forumla might be right, looks a bit long to me :), there are
> > better/other ways...
> >
> > http://mathforum.org/library/drmath/sets/select/dm_center_circle.html
> >
>The case for a CNC is even simpler, because we don't have to use any
>three random points. We can choose to measure points that make the
>calculation easier. For example, the user drops the edge finder into
>the hole (ideally reasonably close to the center, but that's not
>required). The program then moves X only to prove the "left" side, then
>moves X only to probe the "right" side. The midpoint of that line
>(X1+X2)/2 is the X center point. Move to the calculated X center point
>and do the same thing in Y. If you're really touchy about precision,
>repeat the X measurement from the Y center, and optionally repeat the Y
>measurement from the refined X center point.
>
>It's not as hard when you can control where the points come from.
>
>- Steve
Steve,
That's pretty much the procedure I use
on my manual mill with a DRO. And here I thought
I was a genius coming up with that idea... =8^Þ
Mark
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