Controls: Location of once center of curvature relative to some other item. It may be related to another center of curvature, a plane in space, or a physical datum.
Related Terms: Edge Thickness Difference (ETD), Edge Runout (ERO), Wedge, Mechanical Wedge, Total Indicated Runout (TIR), Beam Deviation
Units: Linear units or angular units
Specification Must Contain: Relationship between a center of curvature and the reference.
Optimax Preferred Specification: ETD
Reasons: Directly measured on the machine or with little specialized equipment
Manufacturing Standards: ISO-10110-6
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