The linear guide rail is a precision part, and its movement accuracy must be ensured in use. Therefore, it is necessary to understand the error measurement method of linear guide rail in practical use! The following content, share with you how to measure the error of linear guide rail.
1. After several steps of the linear guide rail with equal pitch are made, the supporting points of the guide rail are connected end to end with the help of a special bridge plate with a level or other precise angle measuring instrument, and move along the measuring direction, and the inclination angles of each step relative to the selected zero position (measuring datum, horizontal line) on the level are measured respectively. So that it can be converted into the height difference between adjacent areas. The comprehensive result of the relative height difference between the equidistant finite points of the linear guide rail reflects the fluctuation of the curve of the measured guide rail, and the method of measuring the guide rail with equal pitch finite points with a level meter.
2. No matter how the evaluation benchmark is converted, the principle that the measurement direction is always the same. This principle is that the measurement direction reflected by the measurement reading should always be perpendicular to the measurement benchmark, and the coordinate distance between the two containment lines should be used for measurement, and the direction should not be changed because of the slight inclination between the evaluation benchmarks.
3. The measurement benchmark of guide rail error can be selected arbitrarily, and the evaluation benchmark should conform to the principle of minimum conditions. That is to say, when measuring the accuracy of the guide rail, the actual outline of the measured guide rail must be contained by two parallel ideal straight lines, and the distance between these ideal straight lines should be minimized. Then the distance between these two ideal straight lines, which are called the rail containment line, is the straightness error of the measured rail.
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