Fanuc Corporation

Komatsu Corporation

Komatsu Industries Corporation

Hiroyuki Kawamura

Yasusuke Iwashita

Tadashi Okita

Satoshi Ikai

Kenichi Takayama

Junichi Tezuka

Yuuya Ueno

Tetsuaki Kato

Kenta Yamamoto

Noriaki Neko

Yukio Toyozawa

Shunsuke Matsubara

Osamu Hanaoka

Akihiko Fujimoto

Kaname Matsumoto

Hiroyuki Abe

Toshiyuki Ogata

Eiji Genma

Kouki Kameta

Kazuyuki Sugiyama

Kunio Kojima

Toru Shirahata

Norio Watanabe

Kouki Konishi

Zhiwei Tang

Chengbin Ma

Tang Zhiwei

Kenichi Fanuc Takayama

Satoshi Fanuc Dai3virakaramatsu Ikai

Satoshi Room S-121 Fanuc Dai3virakaramatsu Ikai

Saoshi Ikai

A numerical controller that creates a tool path from a plurality of command points includes: a command point sequence acquisition unit that acquires an existing command point sequence; a command point creating unit that creates at least one additional command point, based on the existing command point sequence; and an interpolation processing unit that interpolates the existing command point sequence and the additional command point to create the tool path. The command point creating unit outputs, as the additional command point, an intersection point Q1 between an arc C1 passing through consecutive three command points, P0, P1 and P2, in the existing command point sequence and a perpendicular bisector of a line segment whose end points are P1 and P2.

Numerical controller having tool path interpolation

In oscillating an oscillating body, a control unit obtains a load torque due to the gravity acting on a drive motor at least at one angular position defined about an axis of rotation. The control unit calculates a specified maximum acceleration depending upon if the load torque Q is acting in a direction in which it hinders the acceleration or deceleration of the drive motoror is acting in a direction in which it assists the acceleration or deceleration. An acceleration for the oscillating body is set so as not to be greater than the calculated specified maximum acceleration. The control unit adjusts the acceleration of the oscillating body depending upon the load torque of when the oscillating bodyis accelerating or decelerating.

Oscillation controller for an oscillating body capable of adjusting acceleration thereof

A motor control apparatus for synchronously controlling a master axis motor for driving a master axis and a slave axis motor for driving a slave axis, includes: a master axis position detector which outputs position data of the master axis and a reference signal with a predetermined fixed period; a master axis receiving circuit which receives the position data and the reference signal output from the master axis position detector; a master axis computation circuit which computes a master axis error representing a difference between the position data received by the master axis receiving circuit and the position data acquired at the time of the reception of the reference signal; and a slave axis motor control unit which controls the operation of the slave axis motor by using the master axis error as a command for synchronizing the operation of the master axis motor.

Motor control apparatus for synchronously controlling master axis and slave axis

A controller of an industrial machine provided with an electric motor, a peripheral apparatus and an amplifier includes a motor power-consumption calculation section, a power loss calculation section, a fixed power-consumption calculation section, and a total power-consumption calculation section. The motor power-consumption calculation section calculates motor power consumption by decomposing a motor current into a Q-phase current value and a D-phase current value, and multiplying the Q-phase current value with a motor rotation speed and a motor torque constant. The power loss calculation section calculates sum power loss of the motor and amplifier. The fixed power-consumption calculation section calculates fixed power consumption of the peripheral apparatus. The total power-consumption calculation section determines total power consumption of the industrial machine in a predetermined time period by integrating, for the time period, the calculated motor power consumption, sum power loss and fixed power consumption.

Controller for calculating electric power consumption of industrial machine

A motor drive includes a dynamic braking circuit for producing a deceleration torque utilizing a braking force caused by a synchronous motor acting as a generator when the synchronous motor is deenergized. The motor drive apparatus is equipped with a dynamic braking circuit fault detection capability, a DC power supply which is obtained by rectifying input AC power, voltage application function for applying a voltage to the windings of the synchronous motor and to the dynamic braking circuit for a predetermined length of time by switching power transistors connected to the DC power supply, current detection unit for detecting the value of a current flowing from the power transistors, and fault checking unit for checking the dynamic braking circuit for the presence or absence of a fault, based on the current value detected by the current detection unit and on a predefined threshold value.

Motor drive apparatus equipped with dynamic braking circuit fault detection capability

A press machine controller () for controlling a press machine () having a servo motor () to drive a slide () via a reduction mechanism () changed in reduction ratio in accordance with the position of the slide () is disclosed. The device includes a command generator () for generating at least one of a position command, a speed command and a torque command for the servo motor (); a vibration command generator () for generating a vibration command based on a parameter preset for the press machine controller (); a slide position detector () for detecting the position of the slide (); and a vibration command adding portion () for adding the vibration command to any one of the position command, the speed command and the torque command for the servo motor () in the case where the slide position is in a predetermined range. The press machine, even if stopped with the slide at the bottom dead center, can be restarted with a small torque.

Press machine controller

A mechanical system includes a plurality of amplifier groups each having a common power source unit connected to a higher-level power source and a plurality of power supply units for supplying power to servo motors from the common power source unit. A servo motor drive control device of the mechanical system includes a plurality of amplifier group electric power detection units each determining an electric energy of the corresponding one of the amplifier groups. Each of the amplifier group electric power detection units totals individual periodic electric energy dEak of the servo motors connected to the power supply unit associated with the corresponding amplifier group thereby to determine an amplifier group periodic electric energy dEbg representing a consumed electric energy or a regenerated electric energy in the corresponding amplifier group and integrates the determined amplifier group periodic electric energy dEbg over a predetermined time length thereby to determine an amplifier group consumed electric energy Ebng.

Servo motor drive control device for calculating consumed electric energy and regenerated electric energy

A control device, for a servo die cushion, by which the speed of a die cushion is prevented from largely deviating from the speed of a slide, whereby the press force between the slide and the die cushion is not significantly reduced. The control device includes a slide speed detector for detecting the speed of the slide, a die cushion speed detector for detecting the speed of the die cushion, and a die cushion speed commanding part for controlling the speed of the die cushion. When a tentative speed command of the die cushion is largely deviated from the detected slide speed, the command of the die cushion is corrected such that the absolute value thereof does not exceed the value calculated by adding the absolute value of the detected slide speed to a positive constant.

Control device for servo die cushion

First and second screens are set for a tool path display apparatus for displaying a path of the tip of a tool attached to a machine tool. The first screen displays the three-dimensional path of the tip of the tool obtained by synthesizing the position information of the drive axes of a 5-axis machine tool. The second screen displays the waveforms of the position deviations and current instructions of the drive axes in chronological order. When a part (line segment) of the three-dimensional path of the tip of the tool is selected on the first screen, the display attribute of the corresponding time area is changed on the second screen so that the time area can be identified.

Tool path display apparatus for machine tool

A servo motor controller having: a frequency identification section that performs analysis based on a frequency response method and identifies the frequency of a disturbance exhibiting a specified phase lag; an input/output gain identification section that identifies the input/output gain at the frequency identified by the frequency identification section; and a magnification factor resetting section that resets an adjustment magnification factor by performing a specified operation on a ratio between the identified input/output gain and a specified target value of the input/output gain.

Servo motor controller

A control device, for a servo die cushion, capable of improving a response after overshoot generated by collision of a slide and a die cushion. The control device has a local maximum point judging part which judges a local maximum point based on the detected speed of the servomotor; a speed correction value calculating part which calculates a speed correction value for the servomotor based on the judgment result and the detected speed of the slide; a second force commanding part which generates a second force command value, the second force command value decreasing from an initial value to a first force command value, the initial value being equal to the force detected value when reaching generally the local maximum point. The force command value is switched from the first force command value to the second force command value, when the force detected value reaches the local maximum point.

A device for controlling a feed motion of a feed control axis and a rotary motion of a rotary control axis, both axes being provided in a machine tool so that the rotary control axis is fed along the feed control axis. The device includes an interference estimating section estimating an interference generated between the feed control axis and the rotary control axis, based on a position command instructed to at least one of the feed control axis and the rotary control axis and a position and mass information of an eccentric load carried by the rotary control axis; and a command correcting section correcting a current command given to at least one of the feed control axis and the rotary control axis, based on the interference estimated by the interference estimating section.

Device and method for controlling machine tool

A die cushion controller, for driving a die cushion, disposed in opposition to a slide of a press machine, by controlling a servo motor, including: a pressure command portion which prepares a pressure command value for exerting a predetermined pressure to a press material disposed between the slide and the die cushion; a pressure detecting portion which detects an actual pressure exerted on the press material; a speed correction value preparing portion which prepares a speed correction value by multiplying a differential value of the pressure command value prepared by the pressure command portion by a coefficient; and a first speed command portion which prepares a speed command value to be instructed to the servo motor based on the pressure command value prepared by the pressure command portion, the actual pressure detected by the pressure detecting portion, and the speed correction value prepared by the speed correction value preparing portion.

Die cushion controller

A motor control apparatus comprises a control processing unit () creating a motor drive command, power supply processing units (A toD) supplying a driving voltage to a motor, and a signal relay processing unit () supplying the motor drive command received from unit () to power supply processing units (A toD). Control processing unit () transmits a preparation request flag to power supply processing units (A toD) via signal relay processing unit (), which includes a preparation complete flag register storing preparation complete flags each transmitted from each of power supply processing units (A toD) to indicate the completion of preparation for supplying power to the motor, and transmits a preparation complete flag enabled state to control processing unit () if contents of the preparation complete flag register indicate that the preparation is completed in all units (A toD).

Motor control apparatus

The control apparatusof a servo motor of the present invention has a position control unitcontrolling the position of a servo motor, a speed control unitcontrolling a speed of the servo motor, a distributing unitdividing the speed command output by the position control unitinto a filtered part Vf which is filtered to suppress vibration and a nonfiltered part Vnf, a filtering unitreceiving as input the filtered part Vf and filtering and outputting the filtered part Vf, and an adder unitadding the filtered part Vf filtered by the filtering unitand the nonfiltered part Vnf and outputting the result to the speed control unit

Growing community of inventors

Yamanashi, Japan

Hiroyuki Kawamura