(1)直線度誤差測量基準可任意選擇，評價基準應符合較小條件原則。也就是說，在測量導軌的精度時，被測導軌的實際輪廓必須包含兩條平行的理想線，并使理想線之間的距離高度較小化。兩理想線之間的距離稱為導軌包含線，即被測導軌的直線度誤差。

(1) The measurement datum of straightness error can be selected at will, and the evaluation datum should conform to the principle of smaller condition. In other words, when measuring the accuracy of the guide rail, the actual contour of the measured guide rail must contain two parallel ideal lines, and the distance between the ideal lines must be reduced. The distance between two ideal lines is called guide inclusion line, which is the straightness error of the measured guide.

(2)無論評價基準如何轉換，發明獎的計量方向不變的原則。這一原則是反映在測量方向測量讀數應該垂直于測量基準,使用坐標測量,包含兩行之間的距離不應由于評估基準轉換,導致小評價基準之間的傾斜和改變方向。

(2) No matter how the evaluation benchmark changes, the measurement direction of the invention award will remain unchanged. This principle is reflected in the measurement direction, the measurement reading should be perpendicular to the measurement datum, the use of coordinate measurement, including the distance between two lines, should not be due to the conversion of the evaluation datum, resulting in the tilt and change of direction between the small evaluation datum.

導軌絲杠

Guide screw

(3)導軌后只用幾個相同音高的齒輪,其支持點端到端連接的幫助下一個特殊的橋梁板或其他精密角度測量儀,并沿著測量方向,分別測量傾角的零位選中每個齒輪相對于級別(測量基準是水平線)。這可以轉換為相鄰高度之間的差值。等間距有限點相對高差的綜合結果反映了被測導軌的曲線起伏。

(3) Only a few gears with the same pitch are used behind the guide rail. With the help of the end-to-end connection of their supporting points, a special bridge plate or other precision angle measuring instrument is set up. Along the measuring direction, the zero position of the inclination angle is measured respectively, and each gear relative to the level is selected (the measuring datum is the horizontal line). This can be converted to the difference between adjacent heights. The synthetic result of relative height difference of equidistant finite points reflects the curve fluctuation of the measured guide rail.

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