The main function of precision ball screw is to support the linear motion, which makes the linear motion more accurate and can still maintain the linear motion at high speed. Its own guide rail has high requirements. Only when the guide rail can provide an accurate and useful way can it ensure that its linear motion is effective and useful. The requirements of precision ball screw for guide rail are as follows.

1、導向的精度要求

1. Accuracy requirements for guidance

導軌支持運動做直線運動還是做帶有圓度的運動，而影響到導向精度的是導軌的幾何精度還有結(jié)構(gòu)形式。當然了導軌的熱變形也在一定程度上影響到了精度，還有工作時候可能碰到的特殊情況，比如說是油膜的厚度。

The guide rail supports linear motion or motion with roundness, and what affects the guiding accuracy is the geometric accuracy and structural form of the guide rail. Of course, the thermal deformation of the guide rail also affects the accuracy to a certain extent, and there are special situations that may be encountered during work, such as the thickness of the oil film.

2、耐磨

2. Wear resistance

反復的直線運動，要求導軌的耐磨性要較高，否直線運動的時間一長，導軌本身的精度就已經(jīng)降低了，那么滾珠絲桿的直線運動的穩(wěn)定性也就受到了影響。

Repeated linear motion requires high wear resistance of the guide rail. If the linear motion takes a long time, the accuracy of the guide rail itself has been reduced, and the stability of the linear motion of the ball screw has been affected.

3、防止疲勞點的突變

3. Prevent sudden change of fatigue point

反復的直線運動，導軌上面就會出現(xiàn)疲勞點，而這個疲勞點就會出現(xiàn)凹坑的情況，所以在控制滾動導軌的時候一定要考慮到大負荷情況和承受力度是否均勻的情況。防止疲勞點出現(xiàn)突變，就能夠確保導軌的有用性。

Repeated linear movement will lead to fatigue points on the guide rail, and pits will appear at this fatigue point. Therefore, when controlling the rolling guide rail, we must consider the large load and whether the bearing force is uniform. The usefulness of the guide rail can be ensured by preventing sudden changes in fatigue points.

滾珠絲桿對導軌的要求是比較高的，就怕反復的直線運動導致導軌上面出現(xiàn)疲勞點，導致疲勞點出現(xiàn)坑洼的情況下使得直線運動不能夠準確有用。因此在選購的時候，導軌的耐磨性和承受力度問題一定要被考慮進去。

The ball screw has high requirements for the guide rail. It is afraid that the repeated linear movement will lead to fatigue points on the guide rail and pits on the fatigue points, so that the linear movement can not be accurate and useful. Therefore, when purchasing, the wear resistance and bearing strength of the guide rail must be taken into account.