Hi Larry -
Good to see a fellow machinist on the forum.
You can bypass the effort of placing the circles with this method:
Use the Offset tool to create a new curve that is offset (either inside or outside as required) 1/2 the diameter of the endmill.
Run Max's PointsOnCurve script available here:
http://moi.maxsm.net/files/
The script allows you to pick the distance between points and copy their coordinates to the clipboard. You even have the option to not place points on straight lines.
I assume the script could be edited to show an extra decimal place so you have one-thou resolution.
Ed Ferguson

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