Good morning,
I have recently set up a program for a welded flange that has a position callout from one welded cylinder to a perpendicular plane(A) and a cylinder (B) located on the flange beyond the welded cylinder .
it has a position of .025 and the program seems to repeat itself well.
my problem is, if you rotate the part 180° the position can come in tolerance or OOT, I am unsure which is most correct, I usually error on the side of caution in these situations but would hate to fail parts that are actually conforming. the difference usually is about .005 or so.
Datum A is established as a plane using 4 points, Datum B is established as a cylinder using concentric circle scans, feature is measured same as datum B. I know perhaps I am not providing enough information, but is there any advice on how to make it so I am getting the most accuracy?
my current running thought is that perhaps rotating the part has the machine picking up B's perpendicularity (as a welded cylinder, it's not going to be perfectly perpendicular.) differently and throwing off the numbers.
