Design of electric control system in automatic machining line
ABSTRACT :In this paper, design scheme of electric control system in automatic machining line is introduced. constitution and function of automatic machining line is described simply. program design about programmable controller (PC) and it`s speciality in this system is introduced particularly. It is a PC that enables a microcomputer to take place of the signal processing part (logical operation / control) in the logical circuit (hard-wired logic), which consists of the relays, timers and counters. The PC is activated by the input from the push button switches and sensors (proximity / limit switches) and control the output loads such as motors and pilot lamps.The control contents for the output loads are determined by the programs given to the PC. Even though it seems easier to use a relay circuit for such a simple control, it becomes very hard to work for wiring when the control becomes complicated. As a merit of PC, it is still easy to create the internal circuit no matter how the control is complicated since it is just a matter of encoding through the programming console.
Keywords: Machining; Automatic line;Control system; Program design