Abstract: A spindle device is mountable with a tool holder, and includes a rotating spindle rotatably mounted to a spindle main body and extending axially to have an axial end surface. A contactless power transmission module is disposed on a flange end surface of the spindle main body and an outer peripheral wall of the rotating spindle for supplying power. An electrically connecting module includes two conductive units each disposed in the rotating spindle and electrically connected with the power transmission module. Each conductive unit has an electrically conductive post extending axially and exposed from the axial end surface for conducting the power to the tool holder.

Abstract: A spindle device is mountable with a tool holder, and includes a rotating spindle rotatably mounted to a spindle main body and extending axially to have an axial end surface. A contactless power transmission module is disposed on a flange end surface of the spindle main body and an outer peripheral wall of the rotating spindle for supplying power. An electrically connecting module includes two conductive units each disposed in the rotating spindle and electrically connected with the power transmission module. Each conductive unit has an electrically conductive post extending axially and exposed from the axial end surface for conducting the power to the tool holder.

Abstract: A SCARA arm includes a base, a first arm, a second arm, a third linear shaft motor, and a fourth shaft motor. On the base is disposed a first shaft motor. The first arm is connected to and driven by the first shaft motor rotate in a horizontal direction. The second arm is fixed to a second shaft motor which is connected to the first arm to rotate the second arm in the horizontal direction. The third linear shaft motor includes a linear motor stator which extends in a vertical direction and is fixed to the second arm, and a linear motor mover which is sleeved onto the linear motor stator and movable along the vertical direction. The fourth shaft motor is drivingly connected to the linear motor mover and a rotary shaft, respectively, and another end of the rotary shaft is inserted out of the second arm.