A method for calibrating a CNC machine including providing instructions for machining a surface of a distortion-free object, selecting a true axis of movement of a toolhead of the machine using the instructions, instructing the toolhead to travel on an object to be machined along the true axis of movement, but where the toolhead actually travels along an actual axis that is deviated from the true axis as a result of the surface distortions on the object to be machined, selecting multiple points along the actual axis traveled by the toolhead on the object to be machined, comparing the distance of the multiple points along the actual axis from the true axis to determine offset amounts from the true axis corresponding to a lack of straightness of the object to be machined, and modifying the instructions to compensate for the offset amounts before uploading the instructions to a CNC controller.

A method for virtually calibrating a CNC machine including the steps of selecting a true axis of movement of a toolhead of the CNC machine, instructing the toolhead to travel along the true axis of movement, selecting multiple points along an actual axis traveled by the toolhead, comparing the distance of the multiple points along the actual axis from the true axis to determine offset amounts from the true axis corresponding to a lack of straightness, and modifying g-code instructions to compensate for the offset amounts before uploading the g-codes to a CNC controller.

A calibration device (30) for a machine tool is described that includes a base (36) attachable to a machine tool and a calibration artefact (32), such as a sphere of known radius. A deflection mechanism attaches the calibration artefact to the base and allows movement of the calibration artefact (32) relative to the base (36) when an external force is applied to the calibration artefact (32). The deflection mechanism also maintains the calibration artefact (32) in a defined rest position relative to the base (36) in the absence of an applied external force. A sensor (46) is provided for sensing the extent of movement of the calibration artefact (32) relative to the base (36). A method of using the device (30) with a reference tool to accurately determine a position of a calibration artefact (32) is also described.

A pitch measuring device for checking a positioning precision of an operating spindle or an operating table of a machine, e.g. of a NC machine tool moving along an at least two dimensional movement path, the pitch measuring device including a measuring device including a rotary encoder and an electronics unit detecting an angular position of a housing base element relative to a housing top element wherein the measuring device is attachable at a machine arm receiving the operating spindle or at a machine table. Additionally a pendulum element can be used that is connected in a rigid manner with the measuring device and which includes a pendulum element with an integrated first inclination sensor which is supplemented by a second inclination sensor which is directly attachable at frame element of the machine.

A condition control of a robot cleaner is performed or service is provided with a user using the robot cleaner to improve the convenience of the user. Various data items obtained through a network connection are used in the condition control or service providing to estimate/determine a behavior, condition, or request of the user. Specifically, the operation of the robot cleaner is controlled based on operations of other associated devices disposed in the same room where the robot cleaner runs.

A machine tool of the present embodiment includes: a column that is disposed in a vertically standing manner and has a predetermined linear expansion coefficient; a spindle head that is supported by the column and supports a horizontal spindle for attaching a tool thereto; and a reference bar that is disposed separately from the column and has a linear expansion coefficient that is different from the linear expansion coefficient of the column wherein the column has a column-side measurement target zone, the reference bar has a reference bar-side measurement target zone, and a measurement means measures a distance between the column-side measurement target zone and the reference bar-side measurement target zone.

A device for measuring a path under load of a first part that is in motion relative to a second part. The device includes an active telescopic bar and a connector. The telescopic bar includes a scale to measure the length of the bar, a coupler to ball link at each end of the bar, and a force sensor to measure the force applied to the bar along its longitudinal axis. The connector links each end of the bar to the first and second part, respectively. The spatial components of the force applied to one of the connector are measured. A measuring method utilizing the device.

[Technical Problem] A conventional robot cleaner have difficulty in recognizing human presence in a target area and/or a user condition (for example, whether or not the user is in sleep) by an autonomous drive sensor therein alone. And the conventional robot cleaner is inconvenient for users because the operation mode of such robot cleaners must be temporally set by the user who takes the trouble to check the another human presence and/or condition in the target area. Thus, the present application presents a control method of a home appliance and/or a control device of a home appliance to improve the user convenience.

[Solution to Problem] A condition control of a robot cleaner is performed or service is provided with a user using the robot cleaner to improve the convenience of the user, wherein various data items obtained through a network connection are used in the condition control or service providing to estimate/determine a behavior, condition, or request of the user. Specifically, the operation of the robot cleaner is controlled based on operations of other associated devices disposed in the same room where the robot cleaner runs.

A condition control of a robot cleaner is performed or service is provided with a user using the robot cleaner to improve the convenience of the user. Various data items obtained through a network connection are used in the condition control or service to estimate/determine a behavior, condition, or request of the user. Specifically, the operation of the robot cleaner is controlled based on operations of other associated devices disposed in the same room where the robot cleaner runs.

A method for identifying geometric errors in a machine tool includes the steps of: positioning a reference sphere so as to align its center with a centerline of a tool spindle; attaching a position measuring device having a gauge head to a rotation unit so as to direct the gauge head toward a rotation centerline of the rotation unit; acquiring displacement data relative to the center of the reference sphere by measuring positions of the reference sphere with the gauge head while rotating a rotation target (the swivel unit or the rotation unit) with the gauge head directed toward the center of the reference sphere, the displacement data being dependent on rotation angles of the rotation target; and identifying the geometric errors by least squares method using a mathematical expression having terms containing the geometric errors and representing displacement dependent on the rotation angles, and the displacement data.