How to calculate lower limit?

huangyhg

For a hole at MMC, the bonus is (measured diameter – lower limit on size), where lower limit on size is (nominal diameter – |diameter minus_tol|).

For a hole at LMC, the bonus is (upper limit on size – measured diameter), where upper limit on size is (nominal diameter  + diameter plus_tol)



For a pin at MMC, the bonus is (upper limit on size – measured diameter)

For a pin at LMC, the bonus is (measured diameter – lower limit on size)



Note that for a pin, the calculation is the reverse of what it is for a hole.



The bonus can never be greater than the diameter plus_tol + |diameter minus_tol|.  If the calculated bonus is larger than this limit, then it is forced to this limit.   Also, the bonus can never be negative (<0), else it is forced to 0.  These conditions can occur if the feature violates its size limits.