CNC engraving machine CNC system hardware structure

A good system should not only has perfect control function and high reliability, and should be easy to expand, easy maintenance, easy to compatible with the corresponding transition template, such as performance, this request as far as possible choose modular, standardized hardware structure. CNC engraving machine CNC system is designed according to this thought, its configuration is shown in figure 1. System machine adopts 486 PC bus industrial control machine, has the standard 16 bit data bus and extend the functionality of flexible plate structure, according to the specific requirements for system for structural optimization. Adopts photoelectric isolation 32-bit parallel stepper motor interface board to control the movement of three stepper motor and the reception of the limit switch signal, using the plate on the 8253 timer as the interruption of step motor running timer interrupt service program, take 2 MHZ clock frequency, interface control through the spindle motor spindle motor start-stop. In a desktop graphics scanners as graphic input device. Figure 1 CNC engraving machine CNC system hardware block diagram