Abstract
PLC in machinery manufacturing equipment control is very broad and is usually used to achieveLogic control, sequential control.In general lathe digital transformation. AS the core component of the PLC for NC system is a new task. The programmable controller (PLC) system for CNC lathe need to be resolved. the article introduces some needed resolving problems. It brings forward principium of control, How can drive the servo signal and X and Z to the coordination of movements; How to change the feed rate; design of system structure, confirmation for input and output point, I / O address allocation;and also the project for speedup/down control during the screw
thread processing. Method of programming design and manual operation trapeziform figure in system of numerical control lathe Corresponding project to problems is provided synchronously. Using S7-200 PLC as
controller, designs the controlling system of lathe,including the programmable flow chart、figure hardware and ladder diagram.
Key words numerical control system Programmable Logic Controller
Drivers signal lathe Input/output points