1、Point position control system
The so-called point position control system is only to control the process of moving the tool from a certain point to another point, and no cutting process is performed during the moving process, and there is no requirement for the motion trajectory. But the coordinate position has a high degree of accuracy requirements. In order to improve productivity machine tools generally follow the highest feed speed for positioning movement, when approaching the positioning point to be decelerated or graded, so as to reduce the positioning error caused by inertia.
2、Linear control system
The so-called linear control system is to control the tool along a parallel to the direction of a coordinate axis, from one position to another, the movement of the route to move parallel to the machine axis, that is, the process of moving the tool can cut at a given speed, and the point position is different from the two points between the speed of movement and trajectory is set by the system.
3, contour control system
Compared with the above two control systems, the contour control system is the most complete function. It is the control of two or more coordinate axes at the same time, not only to control the starting and ending coordinates of the moving parts of the machine, but also to control the speed, direction and trajectory of the whole process. Therefore, under the contour control system, the CNC device needs to have the function of interpolation operation, through the processing of interpolation operator within the CNC system, during the movement of the tool to the workpiece surface continuous cutting, you can carry out a variety of straight line, circular arc, curve processing. Capable of two-coordinate or even multi-coordinate linkage control, but also capable of point and linear control.
