Regenerative chatter is a major limitation in machining operations. This phenomenon is a result of an

unstable interaction between the machining forces and the structural deflections. The forces generated

when the cutting tool and part come into contact produce significant structural deflections.

These structural deflections modulate the chip thickness that, in turn, changes the machining forces.

For certain cutting conditions, this closed-loop, self-excited system becomes unstable and regenerative

chatter occurs. Regenerative chatter may result in excessive machining forces and tool wear, tool failure,

and scrap parts due to unacceptable surface finish, thus severely decreasing operation productivity and

part quality.