this problem is quite common. This is neither a measurement error nor a machine error. The computer does everything right.
The problem lies more with the engineer who thinks that the large plane has a secondary meaning.
in reality, the cylinder A is much too short to represent the main axis (specify the vector)
imagine you are trying to check the problem with a hand measuring device (e.g. a steel angle). I doubt you see a slit of light within the .25 height.
(datum A is only to centering in 99% of these cases)
you can get around the problem by evaluating the concentricity to B|A instead of just to A
I've already experienced that the "designer" can be very stubborn and doesn't see it, but it might be useful if you ask him if you're allowed to do it that way.
this problem is quite common. This is neither a measurement error nor a machine error. The computer does everything right.
The problem lies more with the engineer who thinks that the large plane has a secondary meaning.
in reality, the cylinder A is much too short to represent the main axis (specify the vector)
imagine you are trying to check the problem with a hand measuring device (e.g. a steel angle). I doubt you see a slit of light within the .25 height.
(datum A is only to centering in 99% of these cases)
you can get around the problem by evaluating the concentricity to B|A instead of just to A
I've already experienced that the "designer" can be very stubborn and doesn't see it, but it might be useful if you ask him if you're allowed to do it that way.