1c when the offset b is introduced any misalignments

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Unformatted text preview: by identifying the planes σ1, σ2, σ3, and σ4 as the basis-planes in the tolerance-zone and then establishing corresponding basis-points σ1, σ2, σ3, and σ4 in the hypothetical T-Map space as shown in Fig. 1(c). To avoid confusion, the same labels are used. If the face were circular instead of rectangular, the shape of the T-Map would be as shown in Fig. 1(b). The p′- and q′-axes of both T-Maps represent the orientational variations of the plane while the s-axis represents the translational variations of the plane. Therefore, it is quite evident from Fig 3 that the orientational and translational variations of the plane are uncoupled. If additional orientational control for either parallelism or perpendicularity, using a tolerance t″, were desired, the T-Maps (Figs 1(b) and (c)) would be truncated at tolerance t″ along the appropriate orientational axes labeled p′ and q′. By positioning the basis-points σ1, σ2, σ3, and σ4, as in Figs. 1(b) and (c), the dipyramidal shape...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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