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Depth measurement of small bore


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Hello,

I'm working on a circuit board and I'm trying to get a depth measurement of a small bore with a nominal of depth of 0.056. I'm using the DK 0,5 L22 probe downward in the -Z direction.

What I've done:
-Take a plane measurement of the bottom of the bore.
-Use a Perpendicular to compare the Bottom bore plane with the Top surface plane and using the depth measurement there as that depth.

My measurements are averaging 0.045. I don't believe this is the correct way to get depth, would anyone have any suggestions?

Thank you,
-Joe
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https://qualityforum.zeiss.com/topic/15858-depth-measurement-of-small-bore/
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