RE: [CAD_CAM_EDM_DRO] arc or curve fitting program

karl:

Both VectorCAD/CAM and Intellicad offer the ability to draw an arc given
three points on the arc. Since Intellicad has this feature, I'm sure that
Autocad and Autocad Lite will have it too.

Of course, I'm making the assumption that you're in the process of drawing
the part as you take your measurements.

Hope this helps

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time....


|-----Original Message-----
|From: karl_l_townsend [mailto:karl@...]
|Sent: Wednesday, February 20, 2002 7:03 AM
|To: CAD_CAM_EDM_DRO@yahoogroups.com
|Subject: [CAD_CAM_EDM_DRO] arc or curve fitting program
|
|
|I'm taking some careful measurements on a part I'm reverse
|engineering.
|
|Given three, or more, points on a curve. How do I calculate the best
|G02/G03 parameters to cut that curve? I'm hoping for a simple windows
|app. that lets you put in points and gives the center and radius of
|the circle fitting those points the best. Also, I'll need to be able
|to calculate x,y points on that curve (you need endpoints in G02 and
|I'll not be able to measure right at the endpoint). Is the formula
|r**2 = (y - a)**2 + (x - b)**2 ?
|
|I remember covering this in calculus class 30 years ago, but the only
|reason I got through calculus was due to a very smart girl that let
|me sit right next to her, very near her paper, during quizes.
|Fortunately my eyes had great distance vision at that time <G>
|
|
|Karl
|
|
|
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