CNC (Computer Numerical Control) is a particular application usually to control a multi axis machine tool such as a milling machine or a lathe but also could be a tube bending machine punch press or similar. The CNC controller is usually a purpose built controller using a micro computer but could be a general purpose computer or a PLC. The forerunner was NC (Numerical Control) before computers were readily available, it used solid state logic and relays, timers etc to provide the application.
A PLC (Programable Logic Controller) is a general purpose logic controller specifically designed to allow the user to create their own application. They select appropriate I/O (Inputs Outputs) and perhaps function modules for purposes such as communications and multi axis servo control and program the PLC to perform the required functions.
Can't beat the Siemens!
NC is numerically controlled (hard wired) and CNC is computer numerically controlled.
PLC differences between timer and counter
in cnc we have to change the tool for different operations in vmc automatic change of tool is done
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It's nothing but the SAME
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i think Ltd is private limited company and Plc is public limited company
DCS is advanced version of PLC and DCS works in real time frame while PLC not. There is no monitoring devices in PLC like DCS.
a dedicated computer control the machine tool in CNC and in DNC a no: of machines are controlled by a central computer.
CNC denotes Computer Numerically Controlled. so, a cnc machine has all its functions ie: speed, axis movement, tooling selection ran by the computer. High speed is just that, so you can get a high speed CNC.
Give me the comparism between bcg and plc