I have a part whose C and B datums are long skinny edges of the overall part. The edges are radiused near the top surface, and have only a small 'flat' surface left to get hits for these datums. (Datum A is a huge, relatively flat surface compared to the B and C datums.)
I created a 3d line for each of these datums using about 4-5 hits on each line.
The problem is that the print has a CAB callout for one set of holes and a BAC callout for some others. These holes are coming thru the part normal to -x, +x, -y and +y, so I see why the engineer wants these holes TPd to the datum reference frame in this way, but in order to do it I have two choices that I know of...
1)
create a new alignment where I simulate the datum callout ( but how do I level to a line?)
2)
"USE DATUMS" checkbox, which in my experience doesn't work very well in my version (3.7MR3).
What would you do?
I created a 3d line for each of these datums using about 4-5 hits on each line.
The problem is that the print has a CAB callout for one set of holes and a BAC callout for some others. These holes are coming thru the part normal to -x, +x, -y and +y, so I see why the engineer wants these holes TPd to the datum reference frame in this way, but in order to do it I have two choices that I know of...
1)
create a new alignment where I simulate the datum callout ( but how do I level to a line?)
2)
"USE DATUMS" checkbox, which in my experience doesn't work very well in my version (3.7MR3).
What would you do?
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