Abstract: An elevator electricity feedback device includes a sampling unit, a transmitting unit, and a central processing unit. The sampling unit is electrically connected with an energy supply network of the elevator and the CPU, the transmitting unit is electrically connected with a motor driver of the elevator and electrically connected with the energy supply network through an AC resistor; and the CPU is electrically connected with the transmitting unit. The transmitting unit is electrically connected with the motor driver of the elevator to feed back an energy of the motor driver to the energy supply network when the motor driver is in an energy generating state so that an effect of conserving energy is achieved. In the energy generating state, a DC current produced by the motor driver is converted into AC current which is transmitted to the energy supply network.

Abstract: The invention discloses an operating method and system for a PCB drilling-milling machine using different motion control products. The method comprises that a PCB drilling-milling machine runs a control module of a motion control product by running a drilling-milling module. The operating method further comprises: storing a control module of at least one motion control product in the PCB drilling-milling machine; inputting a selection information which is a code of a desired motion control product while running the drilling-milling module; and, the PCB drilling-milling machine matching the selection information with the code(s) of all the motion control product(s) stored during the step 1, and running the control module of the motion control product matched with the selection information. The invention makes the drilling-milling machine compatible with different motion control products via one drilling-milling module.

Abstract: An elevator electricity feedback device, an elevator electricity feedback method and an elevator thereof are disclosed. The elevator electricity feedback device comprises a sampling unit, a transmitting unit, and a central processing unit. The sampling unit is electrically connected with an energy supply network of the elevator and the CPU, the transmitting unit is electrically connected with a motor driver of the elevator and electrically connected with the energy supply network through an AC resistor; and the CPU is electrically connected with the transmitting unit. The advantages of the present invention are as follows. The transmitting unit is electrically connected with the motor driver of the elevator to feed back an energy of the motor driver to the energy supply network when the motor driver is in an energy generating state so that an effect of conserving energy is achieved.