1, zero offset: when machining a workpiece on a machine tool, it is necessary to fix the workpiece on a workbench or fixture. At this time, it is necessary to determine a reference point as the zero point and offset the zero point according to the needs of precise machining. In Siemens CNC system, the zero offset function can be realized by setting G54~G59 and other workpiece coordinate systems.

2. Machine coordinate: Machine coordinate refers to the coordinate value in the machine coordinate system, which is usually used to control the movement and machining path of the machine tool. In Siemens numerical control system, machine tool coordinates are generally set and operated by G53 instructions.

3. If the zero offset is inconsistent with the coordinates of the machine tool, it will generally lead to problems such as machining error of the machine tool and quality degradation of the workpiece. Therefore, when using Siemens CNC system for machine tool machining, we need to pay attention to the following points: ensure that the zero point of the workpiece is set correctly and offset it as needed.

4. When using G53 instruction to set machine tool coordinates, it is necessary to ensure that there is no conflict between the coordinate system and the workpiece coordinate system. If coordinate system transformation is needed, it should be set with instructions such as G92.

5, processing, need to be careful, avoid misoperation lead to inconsistent machine tool coordinates and workpiece coordinates.