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Analysis of modern control technology of machine tools
2015-07-12


   At present, most of the control system can be traced back to the root of the development of the system, that is to say it has 30 to 40 years of history, then there is one bottleneck problem is the RS-232 connection download speed. This type of control system, the block read speed of up to 5000 / s block. For many parts of the processing program, this speed is sufficient, but the complexity of the parts, the required speed is much higher than the speed. When MTI's Carlo Miceli began developing his own control system, he introduced a completely new approach to the language logic and efficient information processing of the PC. Its product is a modern PC-based hardware-based CNC system, with a new tool path algorithm, the reading speed of 5000 / s block or more. According to GBI Cincinnati, the results have reached "constant speed" processing requirements, its production speed, feed rate is also very stable.


  The machine combines the speed of modern control technology with the precision of machine motion to create a truly constant speed machining system. The machine control system may be able to shorten the machining cycle and improve the complex 3D models, aerospace parts or medical device components. . When the processor can not keep up with the speed of the program, the drive will be due to much-needed information and reduce the feed rate of the tool, thereby extending the processing cycle, resulting in incompatible tool operation. In order to replace the wear and overload of the tool, in addition to increasing the number of tool to the tool library running outside, but also affect the effective use of the spindle to increase the work of the fitter and finishing time.


  When the speed (feedrate) is unstable, some problems arise. When the tool through the part processing operation, the uneven movement of the cutting groove on the tool to produce different load, thus affecting the machining accuracy and surface finish. If the tool is not running fast enough to maintain the minimum cutting load of the tool, friction between the tool and the workpiece will occur instead of cutting, and the unstable movement of the tool will shorten the service life of the tool. This mode of operation can also cause a small amount of cutting edge of the blade gap, so that the tool heat, dull. However, with constant speed machining, the average tool speed through the workpiece will be more uniform, higher precision, not only can shorten the processing time, but also extend the tool life.


  In the "revolutionary" series of machining centers, MTI's control system does not produce excessive stresses associated with high-speed machining, allowing the fluid tool to run on the geometry of complex parts.


  As a result of the high-speed block processing, the random error of the control system can be monitored and adjusted in a stable manner so that the tool can run at a uniform speed and achieve a perfect surface integrity. The system uses more than 80 high-speed buffer to monitor the operation of the tool, if more than a random error, you can immediately adjust the movement of the tool.


  Even when machining very complex shapes, it is said that the speed of the control system, the fine tuning of the drive, and the processing of the tool path can achieve fast and precise program execution.

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