When I run the true position for Circle 1 I get a MMC bonus of .0008" but when I run the true position for circle 2 in relation to circle 1 (datum C) it shows a bonus that is associated with circle 1 as .0190" Can anyone answer as to why it is showing different bonuses for the same circle? Please see attached pdf.
Well I don't use exact measure a lot and I am far from a GD&T expert but this is what I believe I know. In the first FCF you have a mmc (maximum material condition) on the feature itself. This is going to give you bonus depending on the feature of size (in your case your circle) and what tolerances you give on that feature and what it actually measures from nominal. On that second FCF that's a whole other story because you have a maximum material condition on the feature and a boundary on the datum, a mmb (maximum material boundary). This is where it starts to get complicated and I couldn't not even attempt to explain how pcdmis calculates mmb or lmb.
Well I don't use exact measure a lot and I am far from a GD&T expert but this is what I believe I know. In the first FCF you have a mmc (maximum material condition) on the feature itself. This is going to give you bonus depending on the feature of size (in your case your circle) and what tolerances you give on that feature and what it actually measures from nominal. On that second FCF that's a whole other story because you have a maximum material condition on the feature and a boundary on the datum, a mmb (maximum material boundary). This is where it starts to get complicated and I couldn't not even attempt to explain how pcdmis calculates mmb or lmb.
