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Going away from part I k

mipateluk@gmail.com
Why does direction ijk vector go away from point? I e the touch probe will hit a point going into part being measured but ijk is reported as coming from point on part.

I'm not a cmm programmer. Work in quality appreciate any wisdom. Please excuse my ignorance. Thankyou!
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  • By definition, the vector is perp to the surface, on the free side of the material.
    On a CAD, it's the definition, on a mesh also.
    If you look a numerical movie, the color of the mesh is done on the external surface.
    A CMM just uses the opposite of it to measure, so the spheritical tip touch the part on the tangent of the surface, and the tip radius is correctly compensated.
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  • By definition, the vector is perp to the surface, on the free side of the material.
    On a CAD, it's the definition, on a mesh also.
    If you look a numerical movie, the color of the mesh is done on the external surface.
    A CMM just uses the opposite of it to measure, so the spheritical tip touch the part on the tangent of the surface, and the tip radius is correctly compensated.
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