Sanding Block,Polishing Pads,Sande Paint Rollers Co., Ltd. , http://www.nspaintroller.com When detecting the position error (parallelism, verticality, etc.) of the part on the flat plate, the reference axis of the part to be tested is generally adjusted in parallel with the measurement reference plate, and then the measured element is measured. Since the adjustment of the reference axis adopts the method of tentative approximation, the operation is troublesome, and it often takes a long adjustment time, which affects the detection efficiency. This paper introduces a simple adjustment method. Using a vertices on the slab to hold the parts, the distribution of the three jacks