Line parallel to line/plane

[[Ka...]]

Hi experts,

 

Please excuse this basic question... 

Two mounting surfaces in a device must be parallel. They must also be parallel to the mounting surface. Only the deviation in the Z-X plane plays an important role here.
The result of line-to-line parallelism is approximately equal to the straightness of the test element.😞
If I take a line as the test element and a surface as the reference, I also get a very suspiciously good result.

A counter-test with two slanted lines on a plane shows a parallelism of near by 0, which cannot be the case.
I am confused as to how Zeiss calculates and outputs the parallelism exactly.

How can I output the parallelism of two lines? The reference is still missing here...
How exactly is the parallelism between a surface and a line or surface determined in Zeiss CALYPSO?

[[Ke...]]

In your second example image it would appear the parallelism is being checked in the direction normal to the lines (in this case also normal to the plane), which makes sense as the direction of the line is arbitrarily decided by the programmer and can be as parallel or non-parallel as they choose, the parallelism that would be relevant and measurable would be the parallelism of the surface they lie on. Can you artificially induce an imperfection to throw off the parallelism of your test piece (assuming you have a physical part to measure) to verify if the readings are changing? If you are programming purely via CAD currently, it would be reasonable that parallelism and straightness would be very similar due to CAD perfection, you could modify the feature temporarily to induce a tilt normal to the plane( ||-> /| ) to see if the parallelism result changes accordingly