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Thickness of a wedge shaped part

Parker
Hi All,
I need to measure the thickness of a wedge/pie shaped part very accurately. Both sides of the wedge are flat, but obviously not parallel by design. (About 0.5 degree angle). I can probe both sides of this part if I stand the wedge up. With my current method, I believe I am getting some cosine error in the measurements, but am not sure. My current method is to establish a coordinate system using one side as the primary datum, call it the "straight" side. I level to X-, set X origin. I then take points at the same Y and Z coordinates on both sides. As you move along Y, the part thickness changes. Using the CAD I pull the vector for the "angled" side and set the points to the same Y and Z as the "straight" side. I also am using the smallest diameter probe I have. Does this approach sound correct? Customer is questioning my results so I want to make sure I am doing this the correct way.

Thanks!

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  • I would not use the same Y&Z on both sides. I would copy the points from one side, then paste with pattern MIRROR in the X. Yes, the new points will be in the same place and at the same XYZ values. HOWEVER, you simply hide all the cad data EXCEPT the side you want the points on, then F9 each one and click "FIND" (and ONLY find) and it will project them onto that surface at the shortest distance from their current location. This will keep them at the same 'thickness' place of the wedge and not slightly skewed (as I think you are finding).

    All that being said, NO, you can not check the thickness of a wedge. It has no 'thickness', it has a constantly changing nominal value. 'Thickness' has a single nominal value.
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  • I would not use the same Y&Z on both sides. I would copy the points from one side, then paste with pattern MIRROR in the X. Yes, the new points will be in the same place and at the same XYZ values. HOWEVER, you simply hide all the cad data EXCEPT the side you want the points on, then F9 each one and click "FIND" (and ONLY find) and it will project them onto that surface at the shortest distance from their current location. This will keep them at the same 'thickness' place of the wedge and not slightly skewed (as I think you are finding).

    All that being said, NO, you can not check the thickness of a wedge. It has no 'thickness', it has a constantly changing nominal value. 'Thickness' has a single nominal value.
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