Abstract: A method of producing a workpiece includes obtaining CAD data representing the workpiece in multiple workpiece layers. The CAD data includes multiple workpiece layer definitions corresponding respectively to the workpiece layers. The method includes selecting a first workpiece layer definition, preparing a powder bed of powder material on a build platform, and producing, based on the selected workpiece layer definition, a workpiece layer on the build platform by controlling a layer tool to selectively melt or sinter the powder material on the build platform. The method includes assessing the produced workpiece layer, including measuring the produced workpiece layer using a measuring head, analyzing the measurements of the produced workpiece layer, and, in response to the analysis indicating that the produced workpiece layer is defective, reprocessing the produced workpiece layer by controlling the layer tool to selectively melt or sinter the powder material on the build platform.

Abstract: A coordinate measuring machine and a method for operating a coordinate measuring machine, and a rotary table module for a coordinate measuring machine with a rotary table for receiving a workpiece and a rotary table block are provided. The rotary table is supported on a rotary table side rotatably about a rotary table axis. The rotary table block has, opposite the rotary table side of the rotary table block, a bottom side with which the rotary table module can be supported on a measurement table of the coordinate measuring machine. The rotary table block has a further supporting side with which the rotary table block is supportable on the measurement table of the coordinate measuring machine and which differs from the bottom side in its alignment. The rotary table module includes a pose capturing device for the determination of whether the rotary table block is supported on the bottom side.

Abstract: A rotary table for a coordinate measuring apparatus for receiving and mounting a workpiece to be measured is provided. The rotary table has a rotatable main rotary table body and a clamping chuck, which is arranged on the rotatable main rotary table body and which has a clamping chuck receptacle for receiving the workpiece to be measured, the rotary table also having at least one master, which is arranged outside the clamping chuck receptacle, and/or at least one fastener for a master, which is provided in addition to the clamping chuck receptacle. In addition, a coordinate measuring apparatus with a corresponding rotary table is provided.

Abstract: A coordinate measuring machine and a method for operating a coordinate measuring machine, and a rotary table module for a coordinate measuring machine with a rotary table for receiving a workpiece and a rotary table block are provided. The rotary table is supported on a rotary table side rotatably about a rotary table axis. The rotary table block has, opposite the rotary table side of the rotary table block, a bottom side with which the rotary table module can be supported on a measurement table of the coordinate measuring machine. The rotary table block has a further supporting side with which the rotary table block is supportable on the measurement table of the coordinate measuring machine and which differs from the bottom side in its alignment. The rotary table module includes a pose capturing device for the determination of whether the rotary table block is supported on the bottom side.

Abstract: A method of producing a workpiece by using additive manufacturing techniques includes obtaining CAD data representing the workpiece with workpiece layer definitions defining workpiece layers. The method includes selecting a first workpiece layer definition. The method includes preparing a powder bed of powder material on a build platform. The method includes measuring individual characteristics of the powder material on the build platform using a measuring head. The method includes producing, based on the selected workpiece layer definition, a workpiece layer on the build platform. The producing includes controlling a layer tool to selectively melt or sinter the powder material on the build platform. The producing is further based on the measured individual characteristics of the powder material to correct for detected flaws in the powder bed. The method includes selecting each one of the workpiece layer definitions and repeating the preparing, the measuring, and the producing for the selected definition.

Abstract: A measuring arrangement is calibrated for determining rotational positions of a rotary device that has a first part and a second part which can be rotated relative to the first part about a rotational axis. Rotational positions of the first part relative to the second part and/or rotational positions of the second part relative to the first part are detected using a plurality of sensors distributed about the rotational axis. A respective measurement signal corresponding to each detected rotational position is generated such that redundant information on the rotational positions of the first part and the second part relative to each other is provided. The redundant information on the rotational position(s) are analyzed such that effects of a translational movement of the first and the second part relative to each other are corrected, the translational movement running transverse to the extension of the rotational axis.

Abstract: A method for calibrating a rotating device attached to a movable part of a coordinate measuring device having a first part secured to the movable part and a second part rotatable relative to the first part about an axis of rotation of the turning device, on which second part a measuring sensor for measuring workpieces can be attached. The rotating device or a body connected to the second part is moved to a local area of a position determining device by a drive system of the coordinate measuring device, which position measuring device is connected to the coordinate measuring device, by means of at least one sensor of the position determining device. A position of the rotating device or of the body connected to the second part is determined relative to the position determining device, and the rotating device is calibrated in accordance with the determined position.

Abstract: A method of producing a workpiece by using additive manufacturing techniques includes obtaining computer-aided design data representing the workpiece in multiple layers. The method includes providing build platforms and layer tools. Each layer tool is moveable relative to a respective build platform and configured to generate or solidify a material layer on the respective build platform. The method includes producing a first defined material layer of the workpiece on a first build platform by controlling a first layer tool according to a first layer definition. The method includes transferring the first defined material layer from the first build platform to a second build platform and measuring the first defined material layer using a first measuring head to measure individual characteristics. The method includes producing further material layers of the workpiece by controlling a second layer tool in accordance with further layer definitions as a function of the measured individual characteristics.

Abstract: A method for determining a force acting on a rotational device transverse to an axis of rotation of a rotor of the rotational device. The rotational device has a measuring system comprising a measurement body and detection devices for detecting a relative position of the detection device and the measurement body. The method comprises the following steps: producing a force which acts on the rotational device transverse to the axis of rotation of the rotor in a set rotational position, wherein the force causes a deflection of the rotor; determining the deflection of the rotor and/or a position error of the rotor in the set rotational position of the rotor from the relative position of the detection devices and the measurement body; and determining the force in the set rotational position of the rotor using a predetermined relationship between the force and the deflection and/or position error.

Abstract: A test body is provided for determining one or more rotation errors of a rotating apparatus with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus differs from an ideal rotating movement. The test body includes a holder which, together with a part of the rotating apparatus, can be rotated about an axis of rotation. The holder can be configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error(s). One or more test elements are rigidly connected to the holder or are formed on the holder, and each of the test elements is used to determine a rotation error with respect to one or more of the degrees of freedom of movement.

Abstract: A method for correcting an angular deviation between a real angle and an ideal angle between motion axes of a coordinate measuring device. The angular deviation depends on position, temperature, and/or loading mass. Values of a position-dependent angular deviation for partial measurement ranges of the coordinate measuring device are determined, and/or a difference between the angular deviation in a partial measurement range and a total measurement range, and the position-dependent angular deviation is corrected by using these values. Values of the temperature-dependent angular deviation for at least two different temperatures are determined and the deviation is corrected based on these.

Abstract: An arrangement measures coordinates of a workpiece and/or machines the workpiece. The arrangement has a first part and a second part that can be moved relative to the first part. The relative mobility of the first and second parts is specified in addition to a possible mobility of a probe that is optionally additionally fixed to the arrangement. The mobility of the probe is specified by a deflection of the probe from a neutral position during a mechanical probing of the workpiece for the purpose of measuring the coordinates. A measuring body is arranged on the first or second part, and at least one sensor is arranged on the other part, i.e. on the second or first part. The sensor generates a measurement signal corresponding to a position of the measuring body and thus corresponding to the relative position of the first and second part.

Abstract: A method for performing measurements using a test element, comprising: arranging a test element in a measurement region of a coordinate-measuring apparatus, wherein the test element is arranged on a base of the coordinate-measuring apparatus or at/on a first, rotatable part of a rotating apparatus arranged within the measurement region, and wherein the test element is arranged in a first pose relative to the base or to the first part. performing a measurement by incorporating the test element in the first pose, arranging the test element with the movement device in a second pose on the base or on the first part using the movement device, performing a measurement by incorporating the test element in the second pose.

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 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 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 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 rotary table for a coordinate measuring apparatus for receiving and mounting a workpiece to be measured is provided. The rotary table has a rotatable main rotary table body and a clamping chuck, which is arranged on the rotatable main rotary table body and which has a clamping chuck receptacle for receiving the workpiece to be measured, the rotary table also having at least one master, which is arranged outside the clamping chuck receptacle, and/or at least one fastener for a master, which is provided in addition to the clamping chuck receptacle. In addition, a coordinate measuring apparatus with a corresponding rotary table is provided.

Abstract: A method for determining one or more errors of a rotational position establishment system is provided. More particularly, a rotary apparatus having first and second parts that rotate relative to one another about a rotation axis of the rotary apparatus is used to determine one or more rotation errors. A rotation position determination system is used to determine rotation position errors from the rotation positions of the rotary apparatus or a change in the rotation position of the rotary apparatus, and from rotation positions of a reference rotary apparatus or a change in the rotation position of the reference rotary apparatus.

Abstract: A test body is provided for determining one or more rotation errors of a rotating apparatus with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus differs from an ideal rotating movement. The test body includes a holder which, together with a part of the rotating apparatus, can be rotated about an axis of rotation. The holder can be configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error(s). One or more test elements are rigidly connected to the holder or are formed on the holder, and each of the test elements is used to determine a rotation error with respect to one or more of the degrees of freedom of movement.