Hello, we are having problem with our buyer regarding measurement deviations. I think its the difference in how we are measuring BASE C on part.

http://oi64.tinypic.com/30t30bs.jpg

I'm interested in seeing how would you guys measure this BASE C (14.45mm)?

This is how we currently doing it.

http://oi65.tinypic.com/24zf0v6.jpg

We measure RED lines and create parallel lines (GREEN LINES) to it with 1.5mm offset to compensate for "messkugel" half diameter on both sides. From internal diameter (center of part) we create theoretical circle with diameter 151.6mm and construct point at intersection between theoretical circle and GREEN LINES.

Create line between two intersection points and use it as BASE C.

Any help or suggestions on any other methods for measuring this would be appreciated.

Thanks, best regards.

http://oi64.tinypic.com/30t30bs.jpg

I'm interested in seeing how would you guys measure this BASE C (14.45mm)?

This is how we currently doing it.

http://oi65.tinypic.com/24zf0v6.jpg

We measure RED lines and create parallel lines (GREEN LINES) to it with 1.5mm offset to compensate for "messkugel" half diameter on both sides. From internal diameter (center of part) we create theoretical circle with diameter 151.6mm and construct point at intersection between theoretical circle and GREEN LINES.

Create line between two intersection points and use it as BASE C.

Any help or suggestions on any other methods for measuring this would be appreciated.

Thanks, best regards.

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