HAMAR LASER L-703SP, Руководство пользователя

Страница: 57 / 57

53
Appendix B – ANSI B89.3.7.2013 Standard Tolerance Table
Plane6 Software uses the tolerances for the standard plate sizes shown in Figure 29 below from the ANSI B89.3.7.2013
Standard for Granite Surface Plates.
For non-standard sizes, we use the formula from the standard:
“Flatness tolerance for surface plates, whose sizes are not listed in Table 1, is obtained from the following formula:
Overall flatness tolerance (µm) = 1 + 1.6*D 2
Overall flatness tolerance (µin.) = 40 + D
2
/25
Where,
D = diagonal or diameter of the plate
The calculated flatness tolerance for grade AA is rounded up to the nearest 0.5-µm or 25-µin. increment.
The tolerance of grades A and B plates are 2 and 4 times, respectively, those for grade AA. ”
Figure 29 - ANSI B89.3.7.2013 Flatness Tolerance Table