Concentricity of threads to -A-

Hello All,
I am looking for some opinions on how to measure this callout.

I was thinking of scanning the thread with the appropriate pitch set in auto cylinder...

or

Maybe creating lines on the angles of the threads then creating a circle tangent to the 2 lines. Repeat this many times then create a circle or cylinder out of all those circles to create the PD. (If Possible)

I haven't tried this but it was just me thinking over the weekend of how I will go about this.
I'm not even sure I can create a circle or cylinder out of a bunch or circles radially.

TIA

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Lord_Warfield over 7 years ago

I had a similar feature once and we (Hexagon Elgin office and I)ended up taking 8 equally spaced line scans with a large probe diameter. Later we created a cylinder out of the lines and reported it out... we were doing T.P. but it might be worth trying if you cant hold the tolerance.
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Lord_Warfield over 7 years ago

I had a similar feature once and we (Hexagon Elgin office and I)ended up taking 8 equally spaced line scans with a large probe diameter. Later we created a cylinder out of the lines and reported it out... we were doing T.P. but it might be worth trying if you cant hold the tolerance.
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