数控机床定位精度自动螺距补偿功能的应用

Automatic Compensation for Positioning Accuracy of CNC Machine Tools

目前许多数控机床厂为了提高数控机床的位置精度及降低成本,采用机床数控系统中螺距补偿功能来消除其定位误差。螺距补偿是激光干涉仪通过机床运动部件在被测量轴每1个目标位置上测得的位置误差值,并通过补偿软件计算出位置误差补偿值,然后利用相同的RS232通讯电缆传送给数控系统,实现自动补偿。它比通常的补偿方法节省大量的时间,并且避免了由于手工计算和手动键入补偿值而引起的人为误差,同时可以最大限度地选用被测量轴上的补偿点,使之达到提高数控机床位置精度的目的。

To improve the positioning accuracy of CNC machine tools and reduce cost, now many CNC machine tool builders eliminate positioning errors of the machines using the compensation function of CNC systems. Pitch error compensation is applied in this way： the laser system measures the position error on each target position of the measured axis and calculates the compensation value via compensation software before transmitting it to the CNC controller with a RS232 cable, thus realizing automatic compensation. This method saves a lot of time compared with traditional compensation, avoiding the manual error caused by manual calculation and typing compensation value, while you can select the maximum compensation points to achieve the goal of improving the positioning accuracy of machine tools.