This paper presents a novel master manipulator which specifically used in the operation of internal fixation of the pedicle screw. First, in consideration of the practical demand in this surgery, the mechanical design of parallel and serial mechanism is given according to specific design parameters. The mechanism consists of a three DOF of the improved Delta parallel mechanism to position the drill and a two DOF of a serial mechanism to adjust the posture. Then, the revised algorithm of the forward and inverse kinematics towards the improved Delta mechanism and the integral kinematics are illustrated. After that, the workspace and stiffness analysis are analyzed in three transformational directions to test its performance of maximum force feedback and stiffness. The analysis shows that this novel master manipulator meets the requirements in this specific spinal surgery.
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