Fanuc Corporation

Kunitaka Komaki

Kazunari Aoyama

Yasuharu Aizawa

Mitsuo Kurakake

Minoru Nakamura

Yasumichi Sakoda

Takaaki Komatsu

Yuuki Kurokawa

Masahiro Miura

Takeshi Sawada

Shinji Akimoto

Weibo Li

A machining apparatus is provided with a machine learning device that performs machine learning. The machine learning device performs the machine learning by receiving the input of machining accuracy between a machining shape of a workpiece measured on-machine and design data on the workpiece and machining time of the workpiece measured by a measurement device. Based on a result of the machine learning, the machining apparatus changes machining conditions such that the machining accuracy increases and the machining time becomes as short as possible.

Controller-equipped machining apparatus having machining time measurement function and on-machine measurement function

An electronic device including a printed circuit board has a degradation detection circuit that detects degradation of the printed circuit board at a plurality of different degradation levels, and a warning output unit that outputs a warning in accordance with the degradation level detected by the degradation detection circuit.

Electronic device having function of detecting degradation of printed circuit board

Provided is a motor control system of a numerical controller that can instruct a plurality of motors and display data on a display device by means of a single serial bus. An amplifier which controls the motor drives the motor based on a motor command received from the numerical controller via the serial bus. The display device display data on a screen based on display data received from the numerical controller via the serial bus.

Motor control system for control of a motor and a display device

An amplifier (unit) linked via a daisy type serial bus sends a transmission start signal SC and then sends the local data DATAn. If data from an amplifier at the downstream side is not received before transmission of the local data DATAn is completed, the delimit of the data from each amplifier is changed by adding an idle time data TIDD.

Data transmission/reception system

A table containing correspondence between 'n' and 'm' is set in a control circuit of a servo control system so that the current command data in the m-th (m=1, 2, 3 . . . ) current command register is assigned to the n-th (n=1, 2, 3 . . . ) servo amplifier. When data is specified in this table to satisfy &#x201c;n=m&#x201d;, the current command data in the n-th current command register is passed to the n-th servo amplifier. When &#x201c;m=1&#x201d; is set for &#x201c;n=1&#x201d; and &#x201c;m=1&#x201d; is set for &#x201c;n=2&#x201d; in this table, the current command data stored in the first current command register is passed to the first and second servo amplifiers.

Servo motor control system

A motor control system includes a first-type amplifier that receives a PWM instruction, a second-type amplifier that receives a positional instruction, a numerical control device, and a serial bus. The numerical control device includes a first processor that calculates a positional instruction of a motor, a DSP that calculates a PWM instruction of the first-type amplifier from the positional instruction, and a serial bus control circuit that outputs the PWM instruction of the first-type amplifier and the positional instruction of the second-type amplifier to the serial bus. The first-type amplifier generates a drive current signal of a motor directly from the received PWM instruction. The second-type amplifier includes a third processor that calculates a PWM instruction from the received positional instruction.

Motor control system

A data transfer method for connecting a master unit on an upstream side and a plurality of slave units on an downstream side in series with serial bus by a daisy chain system and transferring data having an appended error check code or error correction code between a data transmitter and a data receiver, the data transfer method including: transferring the data flowing in the serial bus in the slave unit from the data transmitter to the data receiver without performing an error check or error correction; performing an error check of the data in a circuit provided in the slave unit aside from a circuit in which the data flow; and informing a result of the error check to the master unit individually by the slave unit, which has performed the error check of the data.

Method, system, and program for master and slave units connected in daisy chain wherein appended error code is transferred between the units

A transmission path delay is set in a shift setting register. A slave unit generates a PRE_ITP signal in response to a timing signal (ITP signal) issued by a master unit. The phase difference between this PRE_ITP signal and the ITP signal unique to the slave unit is loaded into a period modification counter. A timer corrects a reference value, outputs position/speed control period signals (SYN signals) and counts down the period modification counter with these SYN signals until the period modification counter reaches zero. Furthermore, the ITP signal unique to the slave unit is outputted every time a predetermined number of the SYN signals are outputted.

Control system

A numerical controller and a servomotor control system, capable of axis control required in case of a communication failure in the control of servomotors driven by servo amplifiers connected to a plurality of serial buses. The numerical controller has a plurality of serial buses to which the numerical controller and a plurality of servo amplifiers are daisy-chain-connected and controls servomotors connected individually to the servo amplifiers. The device comprises a plurality of communication control circuits for detecting respective communication failures of the serial buses and selecting means for selecting whether or not to notify the other communication control circuits of a communication failure, if any, of any one of the communication control circuits detected thereby. In the control of the servomotors driven by the servo amplifiers connected to the serial buses, an output of a servo amplifier connected to a serial bus that suffers a communication failure is reduced to 0 so that outputs to the servo amplifiers connected to the remaining normal serial buses can be maintained.

Numerical controller and servomotor control system

An analog amplifier performs control of a motor at the speed in proportion to a speed instruction (analog voltage) outputted from a numerical control device. The speed instruction (analog value) is converted into a digital value by an A/D converter and is then sent to a CPU. When the CPU judges that the received digital value corresponding to the speed instruction deviates from a predetermined range, the CPU stops sending out an enable signal, and sends out an emergency stop signal. As a result, the CPU stops electric power supply to the analog amplifier, and also invalidates the speed instruction sent to the analog amplifier, thereby performing control to make the speed of the motor become '0'.

Numerical control device

In a servo control system, a numerical control device and at least one servo amplifier are connected to each other with a serial bus to control a servo motor connected to the servo amplifier. In this system, data transfer systems of at least two types for the serial bus are set, and a data transfer system is selected by a parameter set in the numerical control device.

A data table stored in a numerical controller associates motors controlled by the numerical controller with information from sensors used by the motors. When the numerical controller is turned on, the contents of the data table are sent from the numerical control section to the motor control section. The motor control section controls each motor by using information from the sensors associated with the motor in the data table.

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Yamanashi, Japan

Kunitaka Komaki