Robot arm, residual material removal system including same, and method of driving system

A robotic arm is provided, the robotic arm comprising: a first gripper having a first contact surface; a second holder having a second contact surface corresponding to the first contact surface and an opening in the second contact surface; and a stopper including a pin protruding toward the first gripper. The stopper is configured to pass through an opening in the second gripper. A remnant removal system including a robot arm and a method of driving the remnant removal system to remove a polarization structure of a display panel are provided. 提供了机械臂，机械臂包括：第一夹持器，具有第一接触表面；第二夹持器，具有与第一接触表面对应的第二接触表面和在第二接触表面中的开口；以及止动件，包括朝向第一夹持器突出的销。止动件配置成穿过第二夹持器中的开口。提供了包括机械臂的残材去除系统和驱动残材去除系统的方法以去除显示面板的偏振结构。