In the process of CNC machining, we must pay attention to some details, such as the determination of the tool setting point and the tool change point of the machining center.cnc service ，  The tool setting point is the starting point of the movement of the tool relative to the workpiece during the CNC machining process.

When the machining accuracy requirement is not high, some surfaces on the workpiece or fixture can be directly used as the tool setting surface; when the machining accuracy requirement is high, the tool setting point should be selected according to the design basis or process basis of the part as much as possible. For positioning parts, it is best to take the axis of the hole as the tool setting point.

In the process of CNC machining, the tool setting point must have a certain coordinate relationship with the positioning datum of the workpiece, so that the relationship between the machine tool standard system and the workpiece coordinate system can be determined. The selection of the tool setting point should be convenient for the calculation of the coordinate value, so that the tool setting is convenient.

During tool setting, the tool setting point should coincide with the tool setting point. When the tool needs to be changed during processing, the tool change point should be specified. The setting of the tool change point should be based on the principle that the workpiece, fixture and machine tool will not be damaged during tool change.