Numerical control apparatus for multiple-axis and multiple-channel machine tool

A numerical control apparatus for controlling a machine tool having multiple axes and multiple channels, each axis having a servomotor corresponding thereto, said apparatus comprising:

• main processor means for processing all data except servo command data;
• a plurality of servo command processing means for receiving the servo command data corresponding to one of the channels and for producing servo commands by processing the servo command data, each servo command processing means produces servo commands for axes associated with one of the channels;
• first bus means for operatively connecting said main processor means and said plurality of servo command processing means;
• a plurality of servo control means, each corresponding to one of the axes, for receiving the servo commands corresponding to the one of the axes from at least one of said servo command processing means and for controlling the servomotor corresponding thereto;
• and
• second bus means operatively connecting said plurality of servo command processing means and said plurality of servo control means.