In order to improve a method for positioning a centre point of a second machine tool unit of a machine tool on a geometric axis of a first machine tool unit of the machine tool, wherein the second machine tool unit has a circular path concentric with the centre point, and wherein the first machine tool unit has a component that is rotatable about the geometric axis, in such a way that said method can be performed by an operator easily, reliably and within a short timeframe, it is proposed that a measuring unit is arranged in a defined manner relative to the geometric axis and the position of the circular path relative to the geometric axis is established using the measuring unit, that the position of the centre point of the circular path in the geometric plane relative to the geometric axis is calculated, and that adjustment paths in the geometric plane, which are associated with the adjustment directions, for positioning the centre point on the geometric axis are calculated, and that the machine tool units are moved relative to one another in accordance with these adjustment paths.

Disclosed is a machining method by turning at least one surface of an ophthalmic lens, using a turning machine having at least one geometrical defect. The method includes a step (101-104) of determining a turning configuration for machining by turning the at least one surface of the ophthalmic lens, the turning configuration including turning parameters and machine defects parameters associated to the turning parameters.

A control device includes a control part which generates a torque command based on a resultant command, which is obtained by adding a position deviation, which is the difference between a position command and the actual position of a feed shaft, to an oscillation command to control the feed shaft, and an elastic deformation amount calculation part which calculates the elastic deformation amount of a structure composed of a tool or workpiece and the feeding mechanism therefor based on the torque command. An oscillation command generation part generates the above oscillation command based on the rotation speed of the workpiece, the position command of the feed shaft, and the above elastic deformation amount.

A display device acquires and displays information on a machine tool that includes a spindle for relatively rotating workpiece and a cutting tool and feed axes for relatively feeding the workpiece and the cutting tool and that performs machining on the workpiece while making the cutting tool and the workpiece swing relatively, and includes: a first information display unit that displays first information indicating a position to which the cutting tool is relatively fed with respect to the workpiece; a second information display unit that displays second information indicating a relationship between the phase of the spindle and the positions of the feed axes; and a range selection unit that selects part of the first information as a selection range, and the second information display unit changes the display range of the second information such that the display range corresponds to the selection range selected by the range selection unit.

A program creation device includes an analysis unit that analyzes a composite fixed cycle in which a predetermined cycle is repeated multiple times to create a plurality of command blocks CB1 to CB4 for each of the cycles for executing the cycle; a distribution unit that distributes the plurality of command blocks CB1 to CB4 created by the analysis unit sequentially as a command program for each of the plurality of tools; and a command adding unit that adds a first command word indicating a delay amount of delaying a start timing of the cycle of the second tool from a start timing of the cycle of the first tool on the basis of an analysis result obtained by the analysis unit to the command block CB2 or CB4.

In a machine tool and a control apparatus thereof, a repetitive movement unit is configured so that the cutting tool performs one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool and so that a rotation angle of the relative rotation between the workpiece and the cutting tool during relative movement at a second speed is smaller than a rotation angle of the relative rotation during relative movement at a first speed in one repetitive movement. This configuration limits degradation of machining efficiency when the cutting tool machines the workpiece by performing one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool.

Disclosed is a method for deducing geometrical defects of an optical article turning machine, including a defect value deducing step, during which at least one geometrical defect value is deduced based at least on an indicative information of an optical and/or geometrical data related to an optical and/or geometrical characteristic of a checking piece (10).

This start limiting device (1) is provided with a start prohibiting means (11) which prohibits starting a device (2) when movement of said device (2) is detected, and a start prohibition releasing means (14) which releases the prohibition by the start prohibiting means (11) on starting the device (2); when movement of said device (2) is detected, the start prohibiting means (11) prohibits starting the device (2) such that the prohibition on starting the device can be released by the start prohibition releasing means (14). This start limiting device (1) is provided with a command receiving means (12) which receives a prescribed command, and the start prohibition releasing means (14) is configured to release the prohibition on starting the device until it is determined that a prescribed time condition has been satisfied from the time that the command receiving means (12) receives the aforementioned command.

A machine tool includes a workpiece spindle device which rotates a workpiece, a tool post which can move a tool in a first axis direction (X-axis direction) which is a radial direction of the workpiece and a second axis direction (Z-axis direction) which is an axial direction of the workpiece, and an articulated robot including a plurality of arms, a plurality of joints, and end effectors. The plurality of joints connect the plurality of arms in a rotatable manner around an axis parallel to a third axis (Y-axis) orthogonal to the first axis and the second axis, and the end effectors move in a plane parallel to a movement plane of the tool.

A CNC lathe control system based on graphic interaction includes a CNC lathe, an upper computer and a lower computer, the upper computer and the lower computer communicate with each other, the lower computer is integrally connected with a CNC lathe body and communication is established between the lower computer and the CNC lathe body, the upper computer includes a control unit, and the control unit is used to realize graphic interactive input, process parameter setting, tool path calculation, automatic generation, simulation and verification of CNC machining codes. The system can interactively draw graphics and hierarchically manage and set parameters of processes, which is highly intuitive and greatly improves the intelligent control level of CNC lathes.