What guarantees the machining accuracy of machine tools?
2. Semi closed loop control systemSince the measuring device is installed on the top of the motor or lead screw, it is easy to seal, so there is no requirement for the environment. The precision error of the semi closed loop control system mainly depends on the positive and negative clearance of the lead screw. With the improvement of machining technology, the manufacturing technology level of imported lead screw is higher, and the high-precision screw pair basically eliminates the forward and reverse clearance. In addition, in the assembly process, the double row reverse ball screw pair is adopted, which can completely eliminate the positive and negative clearance. In addition, many machine tool factories adopt pre stretching method to eliminate the influence of thermal deformation of machine tool on the transmission accuracy of lead screw. Therefore, the current semi closed loop control system has been able to ensure that the machine tool to achieve high accuracy.
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