2.2 Commercial CNC (PLC), servo system transformation <br> <br> this way is a popular mode of transformation. CNC system manufacturers provide increasingly convenient debugging methods and tool software to facilitate machine tool builders and rebuilders.
The debugging software mainly includes servo system adaptation, ladder diagram and machine parameters. CNC manufacturers usually provide CD and commissioning manuals. For example, when Siemens sells its economical CNC 802D, it will provide a debugging CD and a simple debugging guide for SINUMERIK 802D. When AB Corporation sells 9 series CNC, it will let users purchase ODS (offline development system) floppy disk and manual. The ODS can be used for ladder diagram development, machine parameter setting, part program editing, etc. on a personal computer, and communicates with the CNC through the 232 port.
2.3 Select industrial computer for CNC transformation
It is not only the numerical control transformation of metal cutting machine tools, but also the industrial control occasions such as process control and sequence control. It can utilize the reliability of the industrial computer, select the appropriate tool software or develop the software by itself.
In the early 1990s, we used STD industrial computer and 4 sets of DC servo system to develop software to transform the domestic 5040 CNC milling machine.
The industrial control computer consists of three 8088 CPU STD computers. Connected by the communication interface. Each STD computer consists of several templates. As a hardware support for distributed computer numerical control.
2.4 Select PC-based CNC
PC-based CNC is the current implementation of open CNC. But there is still a long way to go from the open CNC in the true sense. At present, there is still no consistent definition of "open structure". Some users believe that the open representation can accept the communication protocol used locally; while others believe that openness means that all controllers operate exactly the same. For machine tool application engineers, openness means standard input/output interfaces for tool holder movement, sensors and logic control. For research engineers at large companies and universities, openness means that all of the above comes from the blocks that are used immediately. The development of open architecture is moving forward and will continue due to pressure from users and integrators. A positive result today is the PC based PC, PC-based CNC. The current specific implementation, its hardware composition is a personal computer plus motion control card. The software consists mainly of computer software platforms (such as WIN, DOS) plus CNC system software. The development of the PMAC multi-axis motion control card of Delta Tau of the United States has gone faster in this respect. The PMAC card of PC bus, VME bus and STD bus has been developed. The entire motion control is done independently by PMAC. The software running on the host is only a development environment, responsible for display, debugging, part programming, communication, etc. The PMAC runtime is responsible for the coordinate axis motion control and the background is responsible for the PLC. Using the US MOTOROLA 56001 DSP as the CPU, it can be connected to DC, AC, and stepper motors. The feedback element can be an incremental/absolute encoder, a resolver, a scale, or the like.
Previous page next page
Nanjing Great Century Art Model Co., Ltd. , , https://www.dsjysmx.com