Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Kei Aimi

Yasushi Mukai

Atsuhiro Kawamoto

Hidetoshi Oyama

Masaru Kowa

Yasuhiro Kinugasa

Tatsuya Ikeda

Yasuyuki Tanaka

Wataru Takahashi

Kazunori Matsumoto

Atsumi Hashimoto

Yukinori Hirota

Takashi Nakatsuka

Masahiro Ohto

Kunitoshi Morita

Enable switch device () transitions to positionwhen not operated, to positionwhen mid-operated, and to positionwhen full-operated. Enable switch device () includes first switch (SW) and second switch (SW) each being a two-position switch, and first signal processor (). First signal processor () determines in which one of positionstoan operated state of enable switch device () is, based on an output signal of first switch (SW) and an output signal of second switch (SW). First signal processor () detects presence or absence of failure in each of first switch (SW) and second switch (SW).

Enable switch device and load drive control apparatus equipped with same

A robot including a motor is used to machine a workpiece. The robot further includes the following components: a controller configured to output a speed command and commanded-position information; an encoder; a position sensor configured to output, as a differential signal, the amount of displacement of the position of the workpiece W from a predetermined position; a servo driver configured to control the motor upon receiving the speed command, the output signal of the encoder, and the differential signal; and a safety unit configured to detect a fault in the encoder. When controlling the motor based on the speed command, the output signal, and the differential signal, the servo driver sends the differential signal to the controller. The controller sends the safety unit new commanded-position information, which is generated by adding a correction value based on the differential signal to the commanded-position information.

Method for transmitting information in controller and method for detecting abnormality in encoder

An abnormality detection method of an encoder includes an output step, a control step, an information acquisition step, and an abnormality determination step. The abnormality determination step compares command position information with detection position information of a motor calculated based on an output signal, and determines that the encoder is abnormal in a case where a difference between the command position information and the detection position information of the motor is equal to or more than a predetermined value.

Method and device for detecting abnormality of encoder, and robot control system

A control method for an arc welding apparatus having a function of prohibiting detection of neck based on a change amount of welding voltage and an arc welding apparatus using the method. Thus, since neck determination can be carried out accurately by preventing wrong detection of neck, it is possible to reduce the occurrence of spatter.

Control method for arc welding apparatus and arc welding apparatus

A welding control unit has a common power section for detecting contact of a welding material and for welding. A material contact detector for detecting contact of the welding material and a workpiece, and a power controller are built in the welding control unit. This stabilizes a bead shape in starting welding. The number of components can also be reduced, resulting in more inexpensive equipment. In addition, only a space for installing the welding control unit is needed without any additional space.

Automatic welding equipment

An electric device includes: first openingprovided on rear panelto exhaust internal air out of casing; first partitioncovering second openingprovided on left side paneland having fourth opening; second partitioncovering third openingprovided on right side paneland having fifth opening; and radiatordisposed so as for openingC at one end to faceopening. The configuration can prevent weld spatters or the like from coming into casingdirectly.

Electric equipment

An arc welding control method for repeating alternately a short circuit period allowing a welding wire to short circuit with respect to a member to be welded and an arc period allowing arc recurrence and arc discharge to thereby weld the member to be welded, in which a welding output current just after arc recurrence is controlled to be higher than a welding output current just before arc recurrence for a set given period.

Arc welding control method and arc welding machine

In a conventional arc welding robot control unit, since an emergency stop circuit for a robot and an emergency stop circuit for a welding machine exist independently of each other, not only the circuit configuration thereof is long but also the emergency stop enforcing processings and emergency stop removing processings are executed individually. To solve these problems, according to the invention, there is provided an arc welding robot control unit which comprises an inverter circuitfor enforcing arc welding, main power supply switches-for turning on and off a main power supply used to supply power to the inverter circuita main power supply control partfor controlling the main power supply switches-and an emergency stop buttonfor emergency stopping the operation of a robot, wherein, when the emergency stop buttonis depressed to thereby put the robot into emergency stop, the main power supply switches-can be turned off in linking with the robot emergency stop.

Controller for arc welding robot

The invention provides an arc welding robot capable of collecting and displaying waveform data in a welding operation without using an external device. The arc welding robot comprises: a manipulatorincluding a welding torchmounted thereon; a control unitfor operating the manipulatorin a given operation pattern in accordance with a previously taught operation program, the control unitincluding therein a welding control partfor welding a member to be weldedunder a given welding condition, and a RAMfor recording waveform data relating to at least one of a welding current instruction value, a welding current output value, a welding voltage instruction value, a welding voltage output value, a welding speed, a wire feed speed, the number of times of short circuits and a wire feed motor current during a given period; and, display means for graphically displaying the waveform data recorded in the RAM

Arc welding robot

Control apparatus for robot

Inputs output beams of a laser that have been oscillation-frequency modulated by an injection current control by a power source into a beam splitter through a lens and an isolator, detects beams reflected from a first half-mirror and passing through a path, beams reflected from a second half-mirror and passing through a path, and beams reflected from an object to be measured and passing through a path, with a photodetector, detects a beat frequency signal according to an optical interference of the above-described three types of reflected beams with a frequency detector, and calculates a distance to the object to be measured from the three beat frequencies with a signal processing unit. Can measure the distance in high precision by erasing a change rate of the oscillation frequency modulation and speed of light and by eliminating an influence of fluctuations, based on information of the three frequencies. Also, includes means using a lens for carrying out reflection and transmission on both sides of the lens instead of using the first and second mirrors and includes means using a polarization splitter and a 1/4 wave plate instead of using the beam splitter.

Growing community of inventors

Osaka, Japan

Kei Aimi