Method and apparatus for a spindle with servo feed control

An apparatus comprising:

• a roller screw unit capable of being moved by a first motor;
• a rotatable shaft system having a ball spline shaft that is capable of being rotated about an axis and the ball spline shaft having a first end connected to the biasing unit, the ball spline shaft having a channel and the roller screw unit extending into a portion of the channel, wherein the roller screw unit is capable of moving the rotatable shaft system a first direction and a second direction along the axis while the shaft rotates about the axis;
• and
• a collet chuck fixably attached to a second end of the shaft, wherein the collet chuck is adapted to receive a tool.

A method for performing a drilling operation;

• positioning a spindle assembly to perform the drilling operation on an object, wherein the spindle assembly comprises a roller screw rotatably mounted to a servo motor;
• a ball spline shaft having a first end connected to the roller screw, the ball spline shaft having a channel and the roller screw unit extending into a portion of the channel, wherein rotation of the roller screw in a first direction moves the ball spline shaft in the first direction and wherein rotation of the roller screw in a second direction moves the ball spline shaft in an opposite direction to the first direction along an axis, wherein the ball spline shaft is rotatable around the axis while moving in the first direction and in the second direction;
• and a collet chuck fixably attached to a second end of the ball spline shaft, wherein the collet chuck is adapted to receive a tool;
• and
• performing the drilling operation using the spindle assembly.