With the rise of the automobile industry, there are more and more five axis CNC machine tools. However, in the current market, there are few real five axis (RTCP function) machine tools and many fake five axis (only indexing function) machine tools. What is true five axis, what is false five axis, and what is the difference between three axis? The following description is as follows.
True five axis has RTCP function. It can automatically convert according to the swing length of the main shaft and the mechanical coordinates of the rotating table. When compiling the program, only the coordinates of the workpiece need to be considered, not the swing length of the spindle and the position of the rotating table.
Whether it is a true five axis depends not on whether the five axes are linked, but also on whether the false five axes can be linked. If the spindle has RTCP true five axis algorithm. It is to do indexing processing. As long as a coordinate system is set for the true five axis with RTCP function, it only needs to set the coordinates for the tool once. The fake five axis is a lot of trouble.
The CNC system with RTCP function can be programmed directly with the tool tip without considering the center distance of the rotating shaft. After applying RTCP mode, programming 5-coordinate machining can directly target the tool tip rather than the center of the rotating spindle head, so the programming will become much simpler and more efficient.
From the figure, we can see that for the pseudo five axis of double turntable, multiple coordinates need to be set to achieve the purpose of indexing processing. However, if it is a swing head five axis, the indexing processing cannot be completed, because when the swing head five axes are processed downward, Z does not move alone, but Z moves together with X or y. At this time, the programming of false five axis will be very troublesome and the debugging will be more difficult. At this time, the g51 offset function of three axis cannot be used.
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