Calypso MMC

[[Ja...]]

 

I am trying to check a Perpendicularity and position using MMC. As I understand MMC, it allows extra tolerance when the diameter is larger than nominal size. In the example above the actual diameter is smaller than nominal yet the MMC position is almost .004 under the actual position. How is this possible, what have I done wrong?

[[Ma...]]

As replied in another thread - in this table where is (M) it's calculated statistical value just for SPC purposes - real value is without (M) but your tolerance is increased.

(M) value can be "ZERO" when you have allout as "0 (M)" because of formula ( can be found in forum ) - in that formula is final step a multiplying of base tolerance.