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Whether it is a surface grinder, centerless grinder, gantry grinder, etc., as long as the movement track related to the grinder is mainly V-shaped track and parallel track, and some dovetail tracks, the grinder's track uses point running in during movement and operation to make the grinder move and produce accuracy. The bottom surface of the grinder's track is pasted with a layer of wear-resistant plates, and the cast iron on the upper track and the wear-resistant plates on the lower track are worn in. With the assurance of smoothness and accuracy, the wear-resistant plates under the shovel can achieve the overall accuracy of the grinder by making the points on the top small and dense. Another point is that it depends on the experience and feel of the flower scraper master. As long as these points are ensured, the accuracy problem of the grinder on the track can be solved.