Hi folks,

I copied a sketch from a customer design that had a simple closed form, a trapezoid laying sideways with rounded corners.  The corners were splines instead of arcs although they were originally created as arcs so arcs should be able to lay exactly (to within some very small tolerance) onto the spline.  The other segments were lines.

I wanted to make simple arcs to fillet the corners.  So I used the Point->Along Curve Distance... option and then I chose 1 for the Evenly Distribute value.  The Point was apparently created without trouble.  But, when I tried to use it along with the endpoints of the nearly-arc-like spline to create an arc (3 Point Method) I had trouble and noticed when I zoomed in that the Point that SW created to be on the curve was in fact not on the curve but was off by 0.00015492 inches.  Not a huge problem but I had to work around it and I wonder why this happened and if in general I can't count on that Point creation method when accuracy counts.  I also tried to place a Point at 50% along the Curve, but that gave the same problem.  I tried converting the spline segment to a Curve first then applying the Create Point function but that too gave the same icky result.

Any thoughts?  Thanks and best!

Eric