Coordinate system of CNC lathe

Machine tool coordinate system
On the CNC machine tool, the X and Y axis Cartesian coordinate system established by the small machining factory with the machine tool origin as the coordinate origin is called the machine tool coordinate system. The origin of the machine tool coordinate system has been removed from the top during the assembly and debugging stage of the machine tool, and is the basic reference point for the CNC machine tool to perform machining movements. X, Z positive maximum limit position of prop movement. When the machine tool is powered on and starts to work, the machine tool must be returned to zero first, and the machine tool will move the wire to the reference point of the machine tool. This position is generally determined by the mechanical stop, and some systems can be set by reference. The machine tool coordinate system can be accurately established by returning the machine to zero. In order to ensure the accuracy of the machine tool coordinate system, before leaving the factory, the installation and debugging personnel have determined the position of the machine tool reference point and the mechanical origin, and the user is not allowed to change at will.

Workpiece coordinate system
In order to measure the distance between the origin of the workpiece coordinate system and the reference point of the tool when the machine tool is on the reference point, the small machining factory needs to set the workpiece coordinate system. Like the machine tool coordinate system, the reference origin must first be determined. Generally, the origin is selected and programmed. Coincidence, after establishing the workpiece coordinate system, the distance relationship between the workpiece coordinate origin and the machine tool coordinate system origin is set. Sometimes for the convenience of programming and calculation, we can set the origin of the workpiece coordinate system on the left or right end of the workpiece. If you consider the problems of tool setting and safe tool retraction, you can set the zero point in the program on the center of rotation of the right end face of the workpiece. In this way, as long as Z>0 in the program, the tool tip can be guaranteed to be outside the workpiece. Safe exit of the tool; in theory, it is appropriate to set the programming origin at any position, but in actual operation, in order to facilitate the operation and reduce the error between the process standard and the design standard, try to choose the workpiece origin in the design on the base point.

The relationship between the machine tool coordinate system and the workpiece coordinate system
The machine tool coordinate system is the only reference of the machine tool. We only need to determine the position of the program origin of the workpiece coordinate system that changes with programming in the unique mechanical coordinate system, obtain the mechanical coordinates of the starting point of the reference tool program and determine the tool offset of the non-reference tool. value can be processed smoothly, which is usually done in the next tool setting process.

www.mould-parts.net