I've been running into quite a few radius runout checks recently and I was curious if anyone has come up with a decent way to measure them. I can't show any blueprints but I used my paint skills to mimic 2 examples of recent ones. Example 1 is just a .740-.750 width to the radius runout of both sides of a tab, and example 2 is profile to radius runout of a cutout.

The way I was thinking of doing it would be measure the radius using as fixed_rad circle, measuring the size of radius (via http://support.hexagonmetrology.us/l...-of-small-arcs), and offsetting the measured radius value from the location of the fixed_rad circle. I'm not sure how accurate it would be and I haven't been able to test and correlate it with say holding a pin to the radius and measuring off that. My only concern would be that the fixed_rad best fits based on the inputed radius value, so if I use nominal radius and it measures differently maybe I should re run the circle with the measured value?

Hoping someone has some input or another method, thanks all!

The way I was thinking of doing it would be measure the radius using as fixed_rad circle, measuring the size of radius (via http://support.hexagonmetrology.us/l...-of-small-arcs), and offsetting the measured radius value from the location of the fixed_rad circle. I'm not sure how accurate it would be and I haven't been able to test and correlate it with say holding a pin to the radius and measuring off that. My only concern would be that the fixed_rad best fits based on the inputed radius value, so if I use nominal radius and it measures differently maybe I should re run the circle with the measured value?

Hoping someone has some input or another method, thanks all!

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