Abstract: A machine learning device includes: a measured data acquisition unit that acquires a measured data group; a thermal displacement acquisition unit that acquires a thermal displacement actual measured value about a machine element; a storage unit that uses the measured data group acquired by the measured data acquisition unit as input data, uses the thermal displacement actual measured value about the machine element acquired by the thermal displacement acquisition unit as a label, and stores the input data and the label in association with each other as teaching data; and a calculation formula learning unit that performs machine learning based on the measured data group and the thermal displacement actual measured value about the machine element, thereby setting a thermal displacement estimation calculation formula used for calculating the thermal displacement of the machine element based on the measured data group.

Abstract: An inspection apparatus includes a group data creation unit configured to create group data obtained by dividing a plurality of samples into a plurality of groups, a statistical state calculation unit configured to perform a statistical process for the samples divided into each of the groups to calculate data indicating a statistical state of a predetermined data item between the groups, and a user interface unit configured to display the statistical state in a display format enabling recognition of the statistical state between the groups on the basis of the data indicating the statistical state of the predetermined data item between the groups calculated by the statistical state calculation unit.

Abstract: In a controller and a machine learning device capable of suppressing an influence of an abnormal value based on noise, etc., the machine learning device included in the controller includes a state observation unit for acquiring input data including at least one of internal data and external data of the manufacturing machine controlled by the controller, an input safety circuit for detecting an abnormality in the input data and outputting safe input data, a machine learning unit for executing learning of a learning model and inference using the learning model based on the safe input data and outputting inference data as an inference result, an output safety circuit for detecting an abnormality in the inference data and outputting safe inference data, and an output unit for outputting output data based on the safe inference data.

Abstract: A thermal displacement correction system performs thermal displacement correction in cooperation with a thermal displacement correction device and a computer connected via a network. The thermal displacement correction system that corrects thermal displacement caused by processing performed by a machine comprises: the thermal displacement correction device connected to the machine; and the computer connected to the thermal displacement correction device via the network. The computer comprises: a data acquisition unit that acquires environmental data on an external environment of the machine via the network; a correction value inference unit that calculates a correction value using the environmental data; and a correction value output unit that outputs the correction value to the network.

Abstract: A calculation formula learning unit sets a coefficient relating to a time lag element in a thermal displacement estimation calculation formula by machine learning while fixing a coefficient relating to measured data except the coefficient relating to the time lag element at a predetermined value based on a difference between a thermal displacement estimated value about a machine element calculated by substituting a measured data group into the thermal displacement estimation calculation formula and a thermal displacement actual measured value about the machine element; sets the coefficient relating to the measured data except the coefficient relating to the time lag element in the thermal displacement estimation calculation formula by machine learning based on the difference while fixing the coefficient relating to the time lag element at a predetermined value; and repeats the machine learning.

Abstract: In a controller and a machine learning device capable of suppressing an influence of an abnormal value based on noise, etc., the machine learning device included in the controller includes a state observation unit for acquiring input data including at least one of internal data and external data of the manufacturing machine controlled by the controller, an input safety circuit for detecting an abnormality in the input data and outputting safe input data, a machine learning unit for executing learning of a learning model and inference using the learning model based on the safe input data and outputting inference data as an inference result, an output safety circuit for detecting an abnormality in the inference data and outputting safe inference data, and an output unit for outputting output data based on the safe inference data.

Abstract: A numerical controller looks ahead and analyzes commands indicated by a block contained in a program, and identifies a travel direction of a control target for each of the commands to calculate a time constant based on the identified travel direction. The numerical controller then sets a time constant for filter processing based on the time constant for each of the commands, and performs filter processing on command data subjected to a linear acceleration and deceleration process, based on the set time constant. The numerical controller then calculates movement of each axis for each interpolation period, based on the command data subjected to the filter processing.

Abstract: A numerical controller looks ahead and analyzes commands indicated by a block contained in a program, and identifies a travel direction of a control target for each of the commands to calculate a time constant based on the identified travel direction. The numerical controller then sets a time constant for filter processing based on the time constant for each of the commands, and performs filter processing on command data subjected to a linear acceleration and deceleration process, based on the set time constant. The numerical controller then calculates movement of each axis for each interpolation period, based on the command data subjected to the filter processing.

Abstract: A numerical control device includes a command analysis unit, an acceleration calculation unit in reversing operation, a velocity control unit, and an interpolation unit. The acceleration calculation unit in reversing operation is configured to calculate the acceleration of the drive shaft before and after the reversing operation when reversal of the commanded path of the drive shaft based on the commanded data is detected by the velocity control unit.

Abstract: A cultivator may include at least one rechargeable battery for an electrical power tool as a power source. The at least one rechargeable battery may include a plurality of rechargeable batteries. Further, the plurality of rechargeable batteries may be switched in sequence, so as to be used as the power source.

Abstract: Provided is a radial direction controller capable of handling changes in negative bearing stiffness according to the mounting orientation.

Abstract: Provided is a radial direction controller capable of handling changes in negative bearing stiffness according to the mounting orientation.

Abstract: In an attachment structure, a vehicle-mounted electronic device is attached to a receiving box using an adjusting member for adjusting a difference between an external dimension of the electronic device and a dimension of a receiving space of the receiving box for receiving the electronic device. The adjusting member has an insertion-coupling device for insertion-coupling the adjusting member and the electronic device, and a first catch-coupling device for catch-coupling the adjusting member and the receiving box. The first catch-coupling device is an appended claw-receiving part that corresponds to a flexible claw on the receiving box, and the direction of insertion-coupling of the insertion-coupling device and the direction of catch-coupling of the first catch-coupling device are different.

Abstract: In an engine-driven handheld vacuum/blower, a first grip is provided as one part of an outer shape of an engine casing in which an engine is mounted, and a second grip is formed on a fuel tank which forms another part of the outer shape of the engine casing. The first grip and the second grip are positioned on the opposite sides of the center axis of the engine. Therefore, since there is no unbalanced load applied on either of both the hands, an operator can easily maintain the posture during operation, and can work with the vacuum/blower under good efficiency.

Abstract: A handheld blower is provided with an end pipe having a blowing opening at a distal end thereof, the end pipe being coupled to the upper half side of an impeller case and extended in a tangential direction of the impeller. The blower further includes a grip grasped by an operator's fingers to support the blower in a suspended manner, a stop switch provided on an extension line of a widthwise center line of the grip, and a thumb rest extending to a side of the grip from near the stop switch for receiving the operator's thumb. Thus, the handheld blower can prevent accidental stop of the blower, which is caused by an inadvertent touch to the stop switch with the thumb, during use, and enables the operator to keep orienting the end pipe to a desired direction while mitigating the load on the thumb on the grip.

Abstract: In an engine-driven handheld vacuum/blower, a first grip is provided as one part of an outer shape of an engine casing in which an engine is mounted, and a second grip is formed on a fuel tank which forms another part of the outer shape of the engine casing. The first grip and the second grip are positioned on the opposite sides of the center axis of the engine. Therefore, since there is no unbalanced load applied on either of both the hands, an operator can easily maintain the posture during operation, and can work with the vacuum/blower under good efficiency.

Abstract: An intake passage device is provided for an internal combustion engine having carburetor communicated with a connecting projection of an intake port of a cylinder of the engine, wherein the diameter of the connecting projection becomes smaller toward the inside of the intake port. A connecting pipe is provided for communicating the carburetor with the intake port. An inner end of the connecting pipe is engaged in the connecting projection. There is formed a plurality of one communication passages formed in the connecting pipe for communicating an inside of the connecting pipe with a space between an inside wall of the connecting projection and an outside wall of the connecting pipe.

Abstract: A lubricating apparatus for small-sized four-cycle engines to be used in portable type bush cutters, knapsack type powered sprayers, etc. In the lubricating apparatus, an oil returning channel is arranged to provide communication between a valve gear room and an oil sump, and an oil inhaling channel is branched from the middle of the oil returning channel so as to provide communication to an opening in an immediate lower portion of a skirt of a piston being at the top dead center. By this means, when a crank room is negatively pressurized, the oil sucked from the valve gear room is taken through the oil inhaling channel being in communication to a point inside a cylinder where the highest negative pressure is generated, and fed into the cylinder. An opening portion of the oil returning channel is provided with a check valve for opening when the engine is upright and closing when the engine inverted or slanted to prevent the backflow of oil from the oil sump to the oil returning channel.

Abstract: A four-cycle engine has a base plate provided on a side of the engine and having an opening communicated with a carburetor. A choke plate is pivotally mounted on the base plate, and a choke lever is pivotally mounted on the base plate. A transmitting means is provided for transmitting the opposite rotation of the choke lever to the choke plate so as to rotate the choke plate.

Abstract: A cam gear is mounted on a camshaft, and an intake cam and an exhaust cam are formed on the cam gear for operating an intake valve and an exhaust valve of a hand starting four-cycle engine. A decompression device is rotatably mounted in the cam gear. A decompression cam of the decompression device is exposed from the exhaust cam. The decompression device has a weight, and a spring is provided for urging the weight to the cam shaft. Elastic force of the spring is set so that the weight is urged toward the camshaft in hand starting operation of the engine and moved apart from the camshaft by centrifugal force, thereby projecting the decompression cam in the compression stroke of the engine as to open the corresponding valve.