what are the main component and purpose of CNC? i need your help to answer my question above. thanks, fadzil

The purpose of Computer Numerical Control is to enhance
conventional machining processes by bringing the following advantages: increase of
productivity; manufacture complex shapes; simplification of tooling and work holding;
reduction of lead time, accuracy of work done.

CNC machine
tools comprise the following main components:

- machine
tools whose tables are controlled in X and Y axes and spindles controlled in Z
axis.

- drive systems: drive motors, leading ball-screws
and amplifier circuits.

- machine control units which read
and decode part program instructions, generate axis motions commands, receive feedback
signals regarding the position and the speed of each driven axis,
etc.

- part programs that are a series of lines comprising
the instructions needed to machine the part.

- program
input devices which help to input the part program within CNC
control.

- feedback systems that measure the position of
cutting tool at each moment by mean of transducers of position and
speed.