BY AVINASH TIWARI
CNC MILLING MACHINES
CNC MILLING M/C Why CNC? What is CNC , milling m/c? Features??
Machining centre  Computer controlled machine tool with
automatic tool changing capability  APC (automatic pallet changer)  Features and use??
Types of m/c centres Horizontal m/c centre Vertical m/c centre Universal m/c centre
Axis identification Linear axes: X, Y, Z Thumb rule Rotary axes: A, B, C
Electronic control system  Open loop control system (For table slide)  Closed loop control system(Feedback control
system)
ATC() Used to load and unload tool in-to the spindle Follows the code for tool selection T-word and M06 used
Tool magazine Drum type Chain type (On sprockets-large no. of tools)
Importance of ATC  ????
CNC Programming  Next Lec