![]() ![]() For many years this port is suppressed from laptop computers, and in recent years it is getting harder to find it also on desktop computer configurations. Parallel port will in few years celebrate its 50th birthday. Above facts lead to current situation where tremendous number of machines which use described control scheme are active. On the other side, Mach series of software packages from Artsoft company, which is among the first who managed to provide "smooth" generation of STEP/DIR pulse train, has become standard among software that turns PC computer into CNC controlling unit. Thereby, parallel printer port (LPT), because of some of its hardware features has been imposed as a port for communication between CNC controlling electronics and PC computer. ![]() The last two decades have seen enormous development of CNC control systems based on PC computer as control unit. ![]()
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