This opposite position is usually located on the machine workbench or fixture. The selection principles are as follows:

The origin position of the workpiece coordinate system is set by the operator. After the workpiece is clampped, it is determined by the knife. It reflects the distance position relationship between the workpiece and the zero of the machine tool. Once the workpiece coordinate system is fixed, it is generally not changed. The workpiece coordinate system and programming coordinate system must be unified, that is, during machining, the workpiece coordinate system and programming coordinate system are consistent.

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