Abstract: A mechanical arm system includes at least two links, at least two control devices and at least two motor devices. Each of the control devices includes a first control unit, a mechanical arm control unit and a driving unit. The first control unit receives an end-position command to output a first torque signal. The mechanical arm control unit includes a rigid mechanical unit and a mechanical model unit. The rigid mechanical unit receives the first torque signal to obtain a rigid mechanical torque, and the mechanical model unit receives the rigid mechanical torque and operates the flexible mechanical model to establish the mechanical arm model for obtaining the target torque, and the target position signal is output according to the target torque. The driving unit generates a driving signal according to the target position signal to adjust a rotation angle of the corresponding motor device.

Abstract: A method for determining an abnormal processing of a processing machine is disclosed, and includes: obtaining an acceleration signal corresponding to an acceleration of a tool tip from an accelerometer arranged on a tool-end of the processing machine; performing an integral process to the acceleration signal to generate a movement information; obtaining a motor position information of a motor used to bring the tool-end to move; respectively performing a coordinate alignment process to the movement information and the motor-position information to generate a transformed movement information and a position vector respectively being described based on a workpiece-end coordinates system used by a workpiece-end of the processing machine; combining the transformed movement information and the position vector to generate a relative movement value between the tool tip and the workpiece-end; and, determining whether an abnormal processing occurs based on the relative movement value.

Abstract: A mechanical arm system includes at least two links, at least two control devices and at least two motor devices. Each of the control devices includes a first control unit, a mechanical arm control unit and a driving unit. The first control unit receives an end-position command to output a first torque signal. The mechanical arm control unit includes a rigid mechanical unit and a mechanical model unit. The rigid mechanical unit receives the first torque signal to obtain a rigid mechanical torque, and the mechanical model unit receives the rigid mechanical torque and operates the flexible mechanical model to establish the mechanical arm model for obtaining the target torque, and the target position signal is output according to the target torque. The driving unit generates a driving signal according to the target position signal to adjust a rotation angle of the corresponding motor device.

Abstract: A cover for an electronic device includes first and second planar members wherein, a first end of the second planar member is disposed adjacent to a first end of the first planar member. The cover also includes a coupling arrangement configured to be attached to a first end of the electronic device and configured to permit rotation of the first and second planar members around the first end of the electronic device, and a rotational hinge configured to couple together the first ends of the first and second planar members such that the second planar member is rotatable with respect to the first planar member.

Abstract: A cover for an electronic device includes first and second planar members wherein, a first end of the second planar member is disposed adjacent to a first end of the first planar member. The cover also includes a coupling arrangement configured to be attached to a first end of the electronic device and configured to permit rotation of the first and second planar members around the first end of the electronic device, and a rotational hinge configured to couple together the first ends of the first and second planar members such that the second planar member is rotatable with respect to the first planar member.