The Tangent Plane Requires a Form Control (#201)
(In accordance with Y14.5M-1994 standard)
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Where the tangent plane modifier is applied to a geometric tolerance, it does not provide any form control. In this example, the profile tolerance is modified with the tangent plane symbol. Without the tangent plane symbol, the profile tolerance is controlling the location of the surface to the datum reference frame established by A-B C. It would …
