Auto-Cylinder vs Circles Constructing a Cylinder: For Perpendicularity

Which is more accurate, the auto-cylinder to plane OR 3 auto-circles (constructing a best fit, least squared, cylinder) to plane.

Essentially they should have the same result, correct?

When I run it I have a 0.0009 difference between the results.

Which number should I trust?

(I am building off of an IGES file)

Looking at previous posts I made sure that I had it set to Perp to Datum

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acgarcia over 6 years ago

louisd , how do you use Cir1.hit[1..numhits]? I'm using basic circle scans to construct circles along a cylinder. Then I'm constructing a cylinder using the circle constructions I made to get an overall dimension. Would using Cir1.hit[1..numhits] make the constructed cylinder more accurate?
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acgarcia over 6 years ago

louisd , how do you use Cir1.hit[1..numhits]? I'm using basic circle scans to construct circles along a cylinder. Then I'm constructing a cylinder using the circle constructions I made to get an overall dimension. Would using Cir1.hit[1..numhits] make the constructed cylinder more accurate?
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louisd over 6 years ago in reply to acgarcia

see jefman's explanation below. Basically I stand corrected, by the master himself
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