I have a callout that is a Position of 0.01 MMC | C | D | with a profile of a line of .005 of an irregular feature (Dovetail). How would you do this to meet the print callout?
Profile of a surface 0.01 | C | D |, Profile of a line 0.005? Any other suggestions?
I'd be happier with a position of a surface to constrained datums, personally, but I'm not 100% sold that this isn't valid, just maybe not the best way to get it checked and end up with correlation between inspectors on different CMM's.
You'd have to ask, but I presume the engineer wants the centerline of the dovetail opening at a specific position primarily within a position of .010 (linear zone, he didn't call diametric which would make it invalid). And then check the form for refinement within .005.
If I was going to try this on a CMM, I'd pick up both sides of the dovetail, construct a centerpoint and tolerance that.
I would do it in cross-sections as shown.
Many times.
I'd do it in legacy so I could enforce ONLY the one axis for evaluation (right to left as in your drawing cross section).
I'd also be angry he didn't give me a flat on the "Y" side of the groove. Because of that, you can't check the corner, it won't be there after deburr, especially not in a way that will generate two equal and opposing points from which to make your centerpoint.
You're gonna have to go down the wall a bit with a stylus big enough it won't shank. I'd use a 3mm stylus and constrict my prehit/retract moves.
I'd be happier with a position of a surface to constrained datums, personally, but I'm not 100% sold that this isn't valid, just maybe not the best way to get it checked and end up with correlation between inspectors on different CMM's.
You'd have to ask, but I presume the engineer wants the centerline of the dovetail opening at a specific position primarily within a position of .010 (linear zone, he didn't call diametric which would make it invalid). And then check the form for refinement within .005.
If I was going to try this on a CMM, I'd pick up both sides of the dovetail, construct a centerpoint and tolerance that.
I would do it in cross-sections as shown.
Many times.
I'd do it in legacy so I could enforce ONLY the one axis for evaluation (right to left as in your drawing cross section).
I'd also be angry he didn't give me a flat on the "Y" side of the groove. Because of that, you can't check the corner, it won't be there after deburr, especially not in a way that will generate two equal and opposing points from which to make your centerpoint.
You're gonna have to go down the wall a bit with a stylus big enough it won't shank. I'd use a 3mm stylus and constrict my prehit/retract moves.
