In this paper, a robotic gripper with three fingers has been
presented. The reconfiguration mechanism enables the gripper
to present variety of grasping gesture. The motor-driven part
of gripper includes potentiometer which can detect the rotation
angle of every output variable. The motor controller requires
simple information to transmit motion to fingers and grasp
different shapes of objects. The grasping gesture can be
determined in advance, so that the controller knows the exact
position and orientation of fingertips. There is no coupling
among three fingers that it is easy to implement a variety of
grab configuration, thus adapt to variety of tasks. The robotic
gripper has the ability to work similar to human, and performs
well in the experment.. Not only has stability and flexibility,
but also meet the conditions to determine the trajectory of
movement. The gripper has 9 joints and 6 motors that make it
more flexible. Future work includes the study of force sensor
system, grasping gesture and other applications.