I am measuring a plane on two oposing sides of a part. I want to create a plane centered between these two planes so I can measure how far from center certain features are located. When I create a midplane it appears correct. Just out of curiosity I dimensioned the distance from each side plane to the midplane perpendicular to the midplane. For one side I got .298 and for the other side I got .299. So, my midplane is actually not centered.

Any ideas what is going on? All I can think of is that the side planes aren't parallel. But, I thought the centroids of the planes are used for calculations.

Any ideas what is going on? All I can think of is that the side planes aren't parallel. But, I thought the centroids of the planes are used for calculations.

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