J
jfbock
I feel dumb asking this as it is neophyte to most who read this.
Re: True Position
Understand a very basic true position callout and frame. A hole (lets say) is basic 1" from datum b (on plane datum A) and 1" from a perpendicular datum C. We take the offset of both measurements and calculate true position based on sq +sq etc.
But what if datum B and C are each both vertical and horizontal (with accompanying basic dimensions) from target feature? Maybe I live in simpleland but I hadn't ran into this and now I've had it twice in one week (from same vendor). It would seem to me there are two separate ways to deal with the true position. Is one right? Do I do a true position for each datum? Not sure where to go with this. Let me know if I am not explaining this well.
Re: True Position
Understand a very basic true position callout and frame. A hole (lets say) is basic 1" from datum b (on plane datum A) and 1" from a perpendicular datum C. We take the offset of both measurements and calculate true position based on sq +sq etc.
But what if datum B and C are each both vertical and horizontal (with accompanying basic dimensions) from target feature? Maybe I live in simpleland but I hadn't ran into this and now I've had it twice in one week (from same vendor). It would seem to me there are two separate ways to deal with the true position. Is one right? Do I do a true position for each datum? Not sure where to go with this. Let me know if I am not explaining this well.
