Implementation of turret system control with induction motor on CNC lathe using PLC Siemens S7-200

CNC lathe is popular automatic machine tools, which basically requires Programmable Logic Controller (PLC) for the mechanical motion of the machine. This paper discuss the initial implementation of PLC-CNC in controlling the AC induction motor as rotation servo of the lathe turret. The implementation was mainly tested on CNC lathe machine with 4 different conditions that is 270 rpm, 240 rpm, 210 rpm and 180 rpm respectively. The lowest average error is 5.4%, obtained on 180 rpm.