I have had some trouble determining the best way to measure a dovetail slot and it's mating component. The parts have some difficulty mating occasionally, and our QC department is having trouble getting accurate measurements of the angles using a CMM and other basic measuring devices. I was thinking we might be able to make a go/no-go gauges, but I'm not convinced this is the best route. And ideas would be helpful. Thanks!
I assume measuring the depth of the dovetail is not an issue.
The classic manual technique is what jko describes, using two pairs of gage pins (or just one pair if the angle is known to be good a-priori). When doing this, you should also account for any difference in depth on the two sides, by the way.
If the CMM machine has some kind of spherical probe you might be able to use that in an equivalent way to get angles and widths.