Programming is complicated and difficult. 5 axis cnc machining is different from three axes. In addition to three linear movements, it also has two rotational movements to participate. The spatial trajectory of the synthetic movement formed is very complicated and abstract. In order to process the required space and freedom, Surfaces generally require multiple coordinate transformations and complex spaces to perform related geometric operations. At the same time, it is also necessary to consider the coordination of the movement of each axis, avoid interference, collision, and timely and appropriate interpolation motion, so as to ensure the required Machining accuracy and surface quality, making programming more difficult.
5 axis cnc machining has high requirements on CNC and servo control systems. Generally, 5 axis cnc machining requires five axes to perform coordinated movement at the same time. This requires that the CNC system first has at least five-axis linkage control function. With the addition of rotary motion, this is equivalent to increasing the workload of the interpolation operation, and because the small errors of the rotary motion may be amplified, which greatly affects the accuracy of the machining, the numerical control system is required to have high computing speed and accuracy.
The mechanical structure design and manufacture of five-axis machine tools are also more complicated and difficult than three-axis machine tools. Because machine tools generally increase the coordinates of two rotary axes, a worktable that can tilt and rotate or a spindle that can rotate and swing must be used Headpiece. For these two added components, both the compact structure and the sensitivity and accuracy of sufficient torque and movement are required, which is obviously more difficult than designing and manufacturing ordinary three-axis machining machines.