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    This invention disclosed a method of increasing the accuracy of positioning for high precision machinery. It is achieved by the design, setup and assembling the parts and the machinery, positioning and adjustment (P&A) of the concentric point. According to the static and dynamic forces applied computing, separately P&A the machinery static and moving parts: up, down, left, right, front and back, six dimensions. Coordinating with the P&A unit (composed by screw P&A block; locked screw nut P&A, bolt P&A and inclined surface module P&A block) to positioning, adjustment and locking the parts, machinery and P&A the concentric point. With the ultra-high precision measuring equipment measured data to apply different forces P&A which should conform to the designed specification requirement.  Then parts and machinery will be securely locked.


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