The gap adjustment of the ball screw is to ensure its smoothness in the reverse movement, so that it can still maintain an effective and high-precision working method in the reverse movement. The ball screw must be especially careful when adjusting the gap. Otherwise, the purpose of the adjustment is not fulfilled, making the adjustment even more difficult to use, which is counterproductive. When adjusting the gap of the ball screw, it is mainly from the adjustment of the nut washer, the spring and the tooth difference. The following is how to operate.
1. Double nut washer adjustment method
It mainly depends on the thickness of the washer. The thickness of the washer should be just right for the inner and outer nuts to have a corresponding displacement. The advantages of using this method are high rigidity and simple structure, but it is not suitable for frequent use because it is relatively troublesome to adjust.
2. Spring automatic adjustment method
The main purpose is to use springs to produce axial displacement between the nuts. If this method is used, the ball screw is more likely to wear and the spring is deformed. Moreover, the load requirements are also high, and basically it can only adapt to the situation of low load.
3. Tooth gap adjustment method
The main method is to eliminate the gap by the angle of the external tooth relative to the internal tooth, but the pre-tightening force must be accurate enough. Basically, this method is only suitable for precision positioning systems.
The method of adjusting the gap of the ball screw is mainly the above three methods, and the load must be taken into account when choosing the use. If you choose the automatic adjustment method of the spring, you should check the working performance of the spring and the working performance of the guide regularly. In addition, there is also a method of thread clearance adjustment that can also be properly considered.
