Abstract: A multi-car elevator control device that can shorten an open and close time of a door is provided. The multi-car elevator control device includes, in an elevator system including a plurality of cars that overlap each other on a horizontal projection plane, an open and close instruction judging part that changes, based on a motor speed or current in a moving time of a car door of a specified car, a control parameter of a car door of another car. According to the configuration, the multi-car elevator control device changes, based on the motor speed or current in the moving time of the car door of the specified car, the control parameter of the car door of the other car, in the elevator system including a plurality of cars that overlap each other on the horizontal projection plane. Therefore, the open and close time of the door can be shortened.

Abstract: A door device for an elevator includes an elevator door, first and second door drive devices having first and second rotating shafts, respectively, a power transmission mechanism that moves the elevator door according to rotation of the first and second rotating shafts, and a door control device that controls movement of the elevator door. The door control device includes a first processing device that performs first arithmetic processing for controlling the first door drive device, a second processing device that performs second arithmetic processing for controlling the second door drive device, and an information transmitting unit for information transmission between the first and second processing devices.

Abstract: A door device for an elevator includes an elevator door, first and second door drive devices having first and second rotating shafts, respectively, a power transmission mechanism that moves the elevator door according to rotation of the first and second rotating shafts, and a door control device that controls movement of the elevator door. The door control device includes a first processing device that performs first arithmetic processing for controlling the first door drive device, a second processing device that performs second arithmetic processing for controlling the second door drive device, and an information transmitting unit for information transmission between the first and second processing devices.

Abstract: A laser working apparatus is provided with program analysis means for analyzing a work program and outputting a move command of each axis and an on/off command for turning on/off a laser beam, interpolation means for performing interpolation processing based on the move command and outputting a move distance to a servo amplifier, move distance setting means for setting a move distance for delay operation, and beam on/off delay means for delaying a beam on/off command output to a laser oscillator based on the actual move distance after the on/off command is output and the move distance for delay operation.

Abstract: A method for irradiating a workpiece making a relative move in accordance with a work program with a laser beam for cutting the workpiece includes steps of interrupting the cutting being executed and then restarting the cutting. As the cutting is restarted, machining of the workpiece is performed under specified conditions for a predetermined distance and a predetermined time to provide sufficient machining of the workpiece.

Abstract: A laser beam machining system which can select optimum work conditions at a restart point and restart cutting after a temporary emergency stop. In the machining system, a work command section receives a command based on a work program from a program analysis section and outputs a work command for operating a laser oscillator and a laser beam machine. The work command section also receives a restart command for releasing an emergency stop state from a restart command section, and generates and outputs a corrected work command for work restart in conjunction with the restart command section.

Abstract: A work command section receives a command based on a work program from a program analysis section and outputs a work command for operating a laser oscillator and a laser beam machine, and receives a preliminary work command from a preliminary work command section and generates a work command for preliminary work in conjunction with the preliminary work command section and outputs the command following a piercing work command.

Abstract: A method and apparatus for detecting the machining status of a laser beam machining device, having a multi-mirror resonator for generating a machining beam, which utilizes the secondary light generated by the machining operation and returned from the workpiece surface into the resonator for control of the machining operation. The oscillator and accompanying components, such as beam dividing mirrors and splitters, are operative to separate the secondary light from the laser beam within the resonator and direct the two beams separately to detectors located outside of the resonator. Alternatively, the secondary light and laser beam may be directed to the outside together where they are separated by an integrating sphere for detection.

Abstract: A laser cutting apparatus which allows cutting to be automatically restarted or redone without intervention from an operator once a cutting error or fault occurs. In a first embodiment, when the fault occurs the apparatus discontinues processing on the product corresponding to the fault. Thereafter, it moves to, and restarts cutting at, a starting position of the next product to be cut. In a second embodiment, the apparatus corrects a fault and continues cutting on the product corresponding to the fault by restarting cutting at the fault point. It determines whether a restart is possible at the point of the fault based on the type or definition of the fault. If a predetermined number of restarts are attempted at the point of fault without a successful restart, then the apparatus moves to a new start position. In another embodiment, the apparatus uses a profile sensor to prevent machine damage by sensing the position of the cutting head relative to the workpiece.