At present, with the continuous improvement of semiconductor integration, the newly introduced system is getting smaller and smaller in appearance, more and more compact in structure, and functions such as remote communication, remote diagnosis, multi-machine networking, etc.; operation interface to WINDOWS system* , add mouse, remote control and other operating parts. FANUC mainly introduced 18I, 16I, 20I and 21I systems this year. SIEMENS is a compact system with 840D, 810D and 802D. There are also some manufacturers such as: PA8000NT series CNC controller developed by Taiwan Precision Machinery Research and Development Center, which uses WINDOWS NC operating system and NT instant multiplex processing core. The processing speed of single block program is 2000 pieces/second. The number of read processing can reach 1000, with AART (pre-adaptive adjustment technology) and parameter optimization learning function, which can make the following error close to zero. The software processing path filter can reduce the excessive change of acceleration during the cutting process. Mechanical resonance generated to improve surface roughness; flexible servo, +--10V analog servo interface, and international standard SERCOS digital servo communication interface; PLC programming with ladder diagram, structure statement, function block, instruction Five syntaxes such as code and flow chart for easy design, communication and maintenance; with computer remote communication and instant remote maintenance; control axes and spindles can be expanded to up to 64 axes, I/O points can be expanded to 792/528 points, using Pentium processor, high-speed PLC processing speed of 25K.

In addition to the well-known CNC system specialists such as SIEMENS and FANUC, which have developed and produced many systems suitable for flat or profile grinding, some flat mills have also actively developed CNC systems for their grinding machines. There are:

Siemens SINUMERIK 840D system, the system has more than 20 servo axes, coordinate continuous stroke control, manual data input or input through external computer, remote diagnosis, can change the stroke with the diameter of the grinding wheel, the wheel dressing amount is automatically compensated, Ball screw clearance error compensation, etc.

The Siemens 3G system was developed specifically for grinding and is equipped with an operation reminder for man-machine dialogue. When the axis is tilted, linear and circular interpolation can also be performed. Run cycles that often occur during grinding, such as The spindle swings, and the special preparation function such as the execution of the program, the grinding wheel cutting, the grinding wheel dressing, etc. is interrupted by an external signal, and the fixed cycle program is programmed. Not only can it use an external measuring device (switching signal), but it can also be compared directly to the final size when connecting a suitable measuring head.

The 8400CNC and 8600CNC CNC series produced by ALLEY-BRANDLY Company are suitable for lathes, milling machines and grinding machines. The 8400CNC can control up to 6 servo axes. Any 2 axes can be circularly interpolated. Any 3 axes can be helically interpolated. , 6-axis linear interpolation. The 8600CNC series can control up to 17 coordinates, including 8 involved interpolation axes, 8 position control axes and 1 spindle. It has graphic display, extended branch program, display processing time, high-speed program verification, tool life monitoring and other functions.

Japan FANUC developed OG high-speed high-performance CNC system, in which O-GSG is suitable for surface grinders. It can be used according to different shapes of grinding parts. There are four different grinding methods, with grinding wheel axis angle tilt control function, rough and thick. Grinding, fine grinding, non-sparking grinding a complete set of grinding cycle, position compensation function after grinding wheel dressing, trimming machine relative to the normal direction control function of the wheel, trimming wheel outer edge arc radius compensation function, grinding wheel shape graphic Display function and grinding parameter display, etc. The minimum setting unit of the system is 0.1μm, which is a “compact” CNC system with low price.

In addition, there is a UNICON system jointly developed by ELB and the University of Germany. Japan's Otsuka Iron Works OSP5000G-G, OSP30-NF and other self-developed flat and profile grinding CNC system, its OSP5000G-G can control up to 9 coordinates, 6 coordinates can be linked, with 12-inch color display, man-machine Dialogue programming, automatically determine the cutting coefficient, can be input by floppy disk, into the FMS system, the minimum pulse equivalent, moving equivalent and detection equivalent are 0.1μm, and the inductive synchronizer is fully closed-loop.

Some flat grinding manufacturers use the system of CNC main engine factory, but develop their own software, which is more suitable for plane and shape grinding. For example, JUNG Company of Germany is based on Siemens SINUMERIK 810, using the company's special software, using JUNG KONTUR The programming language shapes and trims the grinding wheel and has graphic assisted operation. Okamoto Corporation of Japan developed the OPL language for grinding processing on FANUC CNC system hardware, and so on.

Today's linear motor, dynamic balance and other technologies and processes are increasingly developed, and the machine tool's work efficiency is greatly improved. The application of suitable measurement technology to the development and utilization of the numerical control system and the enhancement of the electrical automatic control function of the machine tool are even more powerful.

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