In a measurement method, a terminal is brought into contact with an electrode in an electrostatic chuck in contact with a substrate that is grounded. Further, the terminal, the electrostatic chuck and the substrate are fixed, and a current value and a voltage value are measured using an ammeter and a voltmeter, respectively, that are connected to the terminal. In addition, whether or not the terminal and the electrode are electrically connected is determined from a slope of the current value and/or a peak current value based on the measured current value and the voltage value.

Method for monitoring a bar blade chucking and/or a blade slot of a bar blade cutter head for bevel gear production, having the following method steps: providing a main body (26) of a bar blade cutter head (4), wherein the main body (26) comprises blade slots (30) for accommodating bar blades (10), and wherein a component (10), such as a bar blade (10), a test specimen, or the like, is chucked in a detachable and replaceable manner in at least one blade slot (30) of the main body (26) of the bar blade cutter head (4); exciting oscillations of the component (10); measuring the displacement and/or velocity and/or acceleration of the component (10); analyzing the measurement.

A machine tool includes a rotatable spindle, a spindle drive, a tool magazine, a tool changer including a rotating shaft, a rotating shaft drive motor, an angular position detector, a tool change arm having gripping units at both ends, and a controller. After interchanging a first tool mounted on the spindle and a second tool held in a tool pot, when rotating the tool change arm to an intermediate position, rotation of the spindle is started as soon as the second tool mounted on the spindle and the gripping unit are out of contact with each other.

A conveyance apparatus includes two clamp mechanisms. Each of the clamp mechanisms is configured to freely change its state among a fully clamping state, a semi-clamping state, and a non-clamping state. When an object is delivered from a first clamp mechanism that is holding the object to a second clamp mechanism, the second clamp mechanism is brought into the semi-clamping state to temporarily hold the object. Then, the first clamp mechanism is brought into the non-clamping state and the second clamp mechanism is brought into the fully clamping state.

A control system for controlling a tool of a machine includes at least one controller and detecting means. The detecting means includes at least one range finder device for at least partly detecting and positioning an object with regards to the tool in 3D space. An operation mode of the at least one controller depends at least in part on the object. A machine and a method for controlling a tool of the machine are also disclosed.

A workpiece is conveyed from a first fixed point to a second fixed point by a conveyor in a chucked state. A phase of the workpiece that is being conveyed by the conveyor is detected by a detector. The workpiece conveyed to the second fixed point by the conveyor is seated on a seating part. A workpiece seating phase of the seating part is adjusted by an adjustor to the phase of the workpiece detected by the detector.

A method wherein by reducing the amount of current, and therefore torque, to the linear servo motor (50) and/or rotary servo motor (52) of a loader mechanism (9), the loader mechanism is operable for determining proper workpiece positioning in a machine tool such as a gear manufacturing machine, particularly a machine (4) for manufacturing bevel and hypoid gears.

A motor spindle having a first electromagnetic drive system including a stator unit and a rotor unit which can rotate about an axis of rotation and has at least one rotor shaft and a tool receiver for receiving a machining tool. At least one bearing unit provides rotationally mounting of the rotor unit in the stator unit. The tool receiver is arranged in an end region of the rotor unit. The stator unit has a stator housing with an end section arranged in the end region of the rotor unit. The stator unit comprises at least one motor, having a second electromagnetic drive system, with a stator and a rotational rotor, wherein the rotor has at least one rotational housing element of the end section of the stator unit.

A system for machining workpieces includes a machine tool including a support device including a receiving device for workpiece supports. The receiving device is configured to rotate about an axis of rotation with respect to a base of the machine tool. The system includes a workpiece support which can be fastened to the receiving device and has a clamping device, via which a workpiece is fastened. The workpiece support includes a monitoring device to monitor a state of stress of the clamping device. The support device and the workpiece support are electrically coupled via a contactless information transmission interface such that the monitoring device can transmit information about the state of stress monitored during the workpiece machining to the support device. The support device and the workpiece support are configured to be coupled to one another via an energy transmission interface for the transmission of hydraulic and/or pneumatic energy.

A machine tool includes a rotatable spindle, a spindle drive, a tool magazine, a tool changer including a rotating shaft, a rotating shaft drive motor, an angular position detector, a tool change arm having gripping units at both ends, and a controller. After interchanging a first tool mounted on the spindle and a second tool held in a tool pot, when rotating the tool change arm to an intermediate position, rotation of the spindle is started as soon as the second tool mounted on the spindle and the gripping unit are out of contact with each other.