Abstract: A method for determining a mark in a data record with three-dimensional surface coordinates of a scene includes ascertaining a first collection of edge points in a three-dimensional coordinate system of the data record, fitting an equalization area into at least a subset of the edge points of the first collection of edge points to permit the edge points in the three-dimensional coordinate system to be partly positioned on a first side of the equalization area and partly positioned on a second side, lying opposite the first side, of the equalization area, displacing edge points of the first collection of edge points into the equalization area to permit a corrected collection of edge points to be formed, and determining the mark in the three-dimensional coordinate system based on the corrected collection of edge points or the corrected closed circumferential edge line.

Abstract: An optical sensor for determining a coordinate of a measurement object is provided which includes a stop element and an illumination apparatus configured to generate an illumination light beam and to illuminate the measurement object through the stop element, a sensor element configured to detect a portion of a detection light beam emanating from the measurement object and to determine an intensity distribution, and an optical element configured to focus a portion of the illumination light beam at one focal point along an optical axis. The optical sensor includes an apparatus configured to vary and set a relative lateral position of the optical axis to the measurement object to determine, for each of first and second focal points, first and second intensity distributions at first and second relative lateral positions and to determine therefrom a distance coordinate and/or a lateral coordinate of the measurement object.

Abstract: A method and an arrangement for producing a workpiece using additive manufacturing techniques involve in-process measurement in order to determine individual characteristics of one or more workpiece layers. In particular, dimensional and/or geometrical characteristics of a workpiece layer are measured before the next workpiece layer is produced. Advantageously, the measurement results are fed back into the production process in order to increase accuracy and precision of the production process.

Abstract: A coordinate measuring machine comprising an optical sensor for optically capturing a workpiece; an illumination device for illuminating the workpiece; a pose determination unit for determining data relating to a workpiece pose including a position and orientation of the workpiece; a storage unit for storing (i) data relating to a reference pose including a position and orientation of a reference workpiece, and (ii) data relating to a reference light setting of the illumination device used for a measurement of the reference workpiece; and a control unit which is configured to control a light setting of the illumination device for a measurement of the workpiece by adapting the reference light setting based on a comparison of the stored data relating to the reference pose with the determined data relating to the workpiece pose.

Abstract: A confocally chromatic sensor for determining coordinates of two different determination locations of a measurement object.

Abstract: A method for reducing errors in a rotating device permitting rotation of a workpiece about a rotational axis during the determination of co-ordinates or during the machining of the workpiece. The workpiece is rotated about the rotational axis and first and second measuring signals of a first and a second course of the workpiece surface are generated by the coordinate measuring device while the device is positioned at different first and second circumferential positions of the rotational axis. The first and the second measuring signals are used for separating redundant surface information and error information contained in the signals. The redundant surface information relates to the workpiece surface revolving around the rotational axis and the error information relates to errors in the rotating device resulting from deviations between actual positions and orientations of the rotational axis and corresponding ideal positions and orientations.

Abstract: A coordinate measuring machine including a workpiece support for mounting a workpiece to be measured; a mechanism for moving a sensor in a first coordinate direction and a second coordinate direction perpendicular thereto. The mechanism includes: a first measurement slide guided in the first coordinate direction along two parallel guides arranged on opposite sides of the workpiece support. The first measurement slide spans the support. The first slide is driven via a first drive, which drives the first slide along a first guide of the guides, and is driven via a second drive, which drives the first slide along the second of the guides; a second measurement slide guided movably in the second coordinate direction along the first measurement slide. The second slide is assigned a position measuring system, via which the position of the second measurement slide relative to the first measurement slide can be determined; a controller, which actuates the first and second drive.

Abstract: A method is disclosed for ascertaining a focus image distance of an optical sensor, which is provided with a lens, of a coordinate-measuring apparatus onto a workpiece to be measured, wherein the optical sensor and/or the workpiece are movable in a Z direction such that a distance in the Z direction between the workpiece and the optical sensor is variable. Further, a corresponding coordinate-measuring apparatus and a computer program product are disclosed.

Abstract: A rotor arrangement for a slip ring assembly, comprising a shaft element and at least one contact ring. The shaft element is at least partially in the form of a hollow shaft with a hollow interior and a casing wall. The shaft element has a middle section and each contact ring is arranged on the shaft element in the middle section and is electrically insulated from the shaft element by means of an insulation. The middle section has at least one cutout through the insulation and the casing wall into the interior. Each contact ring is connected to a cable element which is guided through one of the at least one cutout into the interior. The shaft element has a first end section with an outer circumferential cross section for the rotationally fixed coupling. Furthermore, a rotary coupling arrangement comprising a rotor arrangement of this kind is proposed.

Abstract: A method and apparatus for reducing errors of a rotary device of a coordinate measuring machine or a machine tool. The rotary device comprises first and second parts rotatable relative to one another about an axis of rotation of the rotary device, and a rotational position measuring device for measuring rotational positions of the first part and the second part relative to one another. Errors of the rotary device due to deviations between actual positions and axial alignments relative to ideal positions and an ideal axial alignment are measured over a range of rotary angles. Expected variations in the position of the first part or second part resulting from a deviation of the rotational movement of the rotary device from an ideal rotational movement are established from the error measurements. Rotational position measurement locations of the rotational position measuring device are established in accordance with the expected variations.

Abstract: A calibration structure for calibrating optical measuring devices is provided. The calibration structure includes a plurality of zones adjoining one another in a plane, wherein the zones adjoin one another along straight lines and/or curved lines and the calibration structure has both zones adjoining one another along straight lines and zones adjoining one another along curved lines, wherein the zones adjoining one another along straight lines or the zones adjoining one another along curved lines have respectively mutually different optical properties. Furthermore, a calibration method for calibrating the optical measuring devices by the calibration structure is provided.

Abstract: A method, a computer program product and a measuring system are provided for operating a triangulation laser scanner to identify surface properties of a workpiece. The scanner has a CMOS sensor chip, an imaging optical unit, and a laser line light source configured to generate a laser line on the workpiece in compliance with a Scheimpflug condition. Data generated on the sensor chip is reduced to an amount of data only including actual lateral positions of image points of the laser line and a quality criterion for each of the image points. The quality criterion is a measure of an intensity distribution along a direction transverse to a local direction of extent of the image points of the laser line on the sensor chip and the reduced amount of data is analyzed with respect to the quality criterion regarding a presence of barcode and/or detection code information and/or texture information.

Abstract: A coordinate measuring machine has a rotary table supporting a measurement object, a measuring head including a measuring element and a frame, on which the measuring head is arranged. The frame has first, second and third frame parts moveable relative to the workpiece holder along first, second and third movement axes, respectively. The measuring element is mounted via at least one fluid bearing, such as an air bearing, on one or more of the frame parts. The measuring head is positioned at a defined position along the first, second and third movement axes. Thereafter, the at least one fluid bearing is deactivated and the rotary table rotated around a further axis while the measuring head, using the measuring element, records current measured values. A shape contour of the object is determined on the basis of the measured values recorded while the at least one fluid bearing was selectively deactivated.

Abstract: A measuring device for an optical measuring system, comprising a rigid body which comprises a probe body or a tool and on which a first optical marker is arranged. The measuring device further comprises a holding part for holding the measuring device by hand or for clamping the measuring device in a machine. At least a second optical marker is arranged on the holding part. Still further, the measuring device comprises a spring element which connects the rigid body to the holding part.

Abstract: A measuring machine (10), in particular a coordinate measuring machine, has at least one optical sensor (34) for recording an image in an image capturing region (80) during an image recording time period (86), a control signal transducer (89) which provides a control signal that represents the image recording time period (86), a measurement illumination arrangement (96) for illuminating the image capturing region (80), and a control device (19). The control device (19) is configured to switch on the measurement illumination arrangement (96) during the image recording time period (86) in a manner dependent on the control signal. The control device is further configured to switch on at least one further illumination arrangement (97, 98, 100, 102) temporally outside of the image recording time period (86) in a manner dependent on the control signal. A corresponding measurement system and method for controlling the illumination are also discussed.

Abstract: A coordinate-measuring system and related method for securely and intelligently coupling and connecting a mobile terminal device to a stationary coordinate-measuring device. A mobile terminal is arranged to be physically separate from and movable in relation to the coordinate-measuring device and is designed for the operation of the coordinate-measuring device. The coordinate-measuring device and the mobile terminal are designed to establish an authenticated wireless connection for exchanging data between the coordinate-measuring device and the mobile terminal. An identifier, which uniquely identifies the coordinate-measuring device, and a dynamic first key are associated with the coordinate-measuring device. The dynamic first key represents an access authorization and preferably also a degree of access authorization of the user. The mobile terminal device is also designed to request the first key from the user. The first key is used for authentication in the establishment of the wireless connection.

Abstract: The present invention relates to a method for simulating an image recording by an optical sensor of a coordinate measuring machine for inspecting a measurement object, comprising the following steps: providing a first data set representing a model of the measurement object, a second data set representing a model of an illumination of the measurement object, and a third data set representing a model of an optics of the optical sensor, and rendering an image stack on the basis of the first data set, the second data set and the third data set, wherein the image stack has a plurality of virtual images of at least one partial region of the measurement object, wherein each virtual image is rendered at least with a different second and/or different third data set. Furthermore, the present invention relates to a method for optimizing an image recording by a coordinate measuring machine.

Abstract: A method for determining measurement conditions of a roughness sensor having at least one measuring needle, a computer program product and a measuring device for carrying out the method are provided. The measuring needle is positioned on a surface in a rest state and rests on the surface without being moved. Measurement signals are recorded in the rest state. A signal line of the roughness sensor is electrically grounded and measurement signals are recorded in the grounded rest state. Further, a method for measuring a roughness of a workpiece surface by the roughness sensor is provided in which the measuring needle is guided along a surface section of the workpiece surface to be measured and moved in a measurement direction (x-direction). The movement of the measuring needle in a plane (yz-plane) perpendicular to the measurement direction is recorded during the movement of the measuring needle along the workpiece surface.

Abstract: A measuring machine (10), in particular a coordinate measuring machine, has at least one optical sensor (34) for recording an image in an image capturing region (80) during an image recording time period (86), a control signal transducer (89) which provides a control signal that represents the image recording time period (86), a measurement illumination arrangement (96) for illuminating the image capturing region (80), and a control device (19). The control device (19) is configured to switch on the measurement illumination arrangement (96) during the image recording time period (86) in a manner dependent on the control signal. The control device is further configured to switch on at least one further illumination arrangement (97, 98, 100, 102) temporally outside of the image recording time period (86) in a manner dependent on the control signal. A corresponding measurement system and method for controlling the illumination are also discussed.

Abstract: A method for automatically receiving a sensor head of a coordinate measuring machine. The sensor head comprises a first changing interface for coupling the sensor head with a carrier structure of the coordinate measuring machine, and a second changing interface for coupling a cable element with the carrier structure. The second changing interface of the sensor head is arranged on an end of the cable element distal to the sensor head, and is spatially separated from the first changing interface. The sensor head is initially provided in a magazine location of the coordinate measuring machine. The sensor head is received with the first changing interface in a first receiver of the magazine location, and the second changing interface is received in a second receiver of the magazine location.