Abstract: A position-measuring device includes a measuring standard, a scanning unit, and a rotary bearing by which the measuring standard or the scanning unit is rotationally mounted. The measuring standard and the scanning unit are rotatable in relation to each other. The scanning unit generates output signals, on the basis of which a rotary angle associated with the relative motion of the measuring standard and the scanning unit is able to be determined. A monitoring device monitors the rotary bearing for the occurrence of bearing faults and is adapted to detect and analyze at least one measured variable for a plurality of different relative positions of the measuring standard in relation to the scanning unit, in order to determine deviations from a setpoint behavior of the measured variables on the basis of the measured variable detected for a plurality of relative positions.

Abstract: A rotary encoder includes a housing and a shaft, which has an axis. A graduated disk is fixed in place on the shaft in torsionally fixed manner. The shaft is adapted for the positionally accurate attachment to a first machine part. Furthermore, a scanning device for scanning the graduated disk is fixed in place on the housing, the housing being arranged such that an outer surface forms a positionally accurate rigid stop on a second machine part in the radial direction. The housing includes a housing body and a cover, the housing body and the cover being connected to each other by press-fitting. The housing has a mechanically flexible element which is deformed as a result of the press-fitting.

Abstract: In a system and a method for positioning a processing tool in relation to a workpiece, an object alignment mark and the workpiece are situated on a first object. In addition, a workpiece alignment mark is situated on the workpiece. The processing tool via which the object alignment mark is detectable is situated on a second object, which is disposed so as to be displaceable along at least one movement direction in relation to the first object. Furthermore, an alignment sensor is disposed thereon, with whose aid the object alignment mark and the workpiece alignment mark are detectable. In addition, a scannable measuring standard, which extends along the at least one movement direction, is disposed on the second object. At least two scanning units for scanning the measuring standard are situated on the first object in order to thereby determine the relative position between the first and the second object along the movement direction, the two scanning units having a defined offset.

Abstract: In a system for detecting the position of an object in relation to a reference system, the object is arranged so as to be movable in relation to the reference system along at least two orthogonal first and second main movement axes. To record the position of the object in relation to the reference system, a position measuring device includes at least two two-dimensional measuring standards situated along the first main movement axis, and four scanning units for an optical scanning of these measuring standards. In addition, at least four additional supplementary scanning units are provided, which are situated between the four scanning units along the first main movement axis.

Abstract: A position-measuring device for determining the position of two objects movable relative to each other, which during operation, generates data in the form of measured position values, and which is to be connected to a processing unit via a data-transmission channel in order to transmit data, the position-measuring device being able to be connected to the processing unit via a first pair of lines, or alternatively, via a first pair of lines and at least one further pair of lines. The position-measuring device is assigned a detection unit with which the presence or non-presence of at least one further pair of lines is detectable, when the position-measuring device is connected to the processing unit via the data-transmission channel.

Abstract: A closed-loop control structure for positioning a load with the aid of an electric motor includes a device for the active damping of unwanted, low-frequency vibrations. The closed-loop control structure has a position controller, a speed controller, and a current controller, which together, form a cascaded control loop. Damping signals which counteract unwanted, low-frequency vibrations are applied to the control loop, at least one first and one second damping signal of different phase angle being derived from a single sensor signal, and the first damping signal being injected between the position controller and the speed controller, and the second damping signal being injected between the speed controller and the current controller.

Abstract: In position-measuring devices and a systems having a plurality of position-measuring devices for determining the position of an object in several spatial degrees of freedom, the plurality of optical position-measuring devices scan the object from a single probing direction, and the probing direction coincides with one of the two main axes of motion.

Abstract: A device for transmitting sensor data, includes a slave interface connectable to a master interface of a control device, a master interface connectable to a slave interface of a measuring device, at least one sensor interface connectable to a sensor, and a circuit configuration including a manipulation unit and protocol unit. A master-data input signal of the master interface and a sensor-data output signal are supplied to the manipulation unit, which outputs a slave-data output signal to the slave interface. At least one protocol-relevant interface signal of the slave interface or the master interface, and a sensor-data signal of the sensor interface, are supplied to the protocol unit, which generates the sensor-data output signal and, based on manipulation rules and the at least one protocol-relevant interface signal, selects when the manipulation unit outputs the master-data input signal of the master interface or the sensor-data output signal as slave-data output signal.