I have a problem with reporting position of a hole.
I'm a bit confused of how to report this in pcdmis.
Using PC-DMIS 2017 R1 SP10
Drawing frame:
ASME Y14.5
Is this correct?
If it is, then what is the actual bonus of position? Also do I take into account deviations of Dat A and Dat B?
What is my actual result and what is the bonus.
Both ways are "correct" in that you set up the feature control frame as it's shown on the drawing. To properly compute the MMB size of a datum feature, you must have the appropriate geometric tolerances to datums of higher precedence previously defined in the program.
Ideally you'll set up an orientation tolerance on A with respect to [Z] and a position tolerance on B with respect to [Z|A(M)]. Without these, PC-DMIS will assume a geometric tolerance of 0 at MMC which may likely be violated, causing the datum feature to show OOT.
A measured value of 0 is not a bad thing for a considered feature. It simply tells you that the part would fit a functional gage. If you want a measured value that is better for controlling your process, remove the material modifiers on your datum references and report that as a reference.