一种经济型四柱液压机微机控制系统针对目前国内外广泛应用的四柱式单、双动液压机，国内开发出了一种以单片微机为核心的经济型数控系统。其主要特点是：（１）位置、压力、时间、温度等信号的输入及电磁阀的驱动、泵流量的调节均为无触点控制，可靠性高。（２）响应快，... An economic four-column hydraulic machine microcomputer control system for domestic and foreign widely used four-column single and double acting hydraulic machine, the domestic developed a single-chip microcomputer as the core of economic CNC system. Its main features are: (1) position, pressure, time, temperature and other signal input and solenoid valve drive, pump flow control are non-contact control, high reliability. (2) fast response, ...