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数控机床参考点的坐标值是相对于机床零点设置的 ,是联系机床坐标系和工件坐标系的关系点 ,每次启动机床 ,都要进行回归参考点操作。目前 ,回归参考点主要有使用脉冲编码器 (或光栅尺 )的栅格法和使用磁感应开关的磁开关法 2种。磁开关法因有定位漂移而较少应用 ,常用的是栅格
The coordinate value of the reference point of the CNC machine tool is set relative to the machine zero. It is the relationship between the machine coordinate system and the workpiece coordinate system. Each time the machine tool is started, the reference point return operation must be performed. At present, there are mainly two kinds of grid switching methods using a pulse encoder (or a grating scale) and a magnetic switching method using a magnetic induction switch. Magnetic switch method due to less drift and positioning applications, commonly used grid