Abstract: An apparatus for testing the accuracy of machine tools and measuring devices has a support and at least one reference element formed as a sleeve, wherein the reference element is glued on top of the support.

Abstract: An apparatus for testing the accuracy of machine tools and measuring devices has a support and at least one reference element formed as a sleeve, wherein the reference element is glued on top of the support.

Abstract: An apparatus for checking the accuracy of a circular path of a work spindle or a machine table, in particular an NC-controlled machine tool, includes a clamping element coaxial with the work spindle, a first rotary bearing disposed on the clamping element and coaxial with the rotation axis of the work spindle, a measurement arm with a first pivot bearing having a first pivot axis orthogonal to the rotation axis of the clamping element, a length measurement system disposed in measurement arm with a glass rod with a marking and a reading device, an adjusting device receiving the measurement arm and having a second pivot bearing with a pivot axis aligned parallel to the first pivot axis, a second rotary bearing having a second rotation axis aligned parallel to the rotation axis of the work spindle, and a stator supporting the second rotary bearing.

Abstract: An apparatus for checking the accuracy of a circular path of a work spindle or a machine table, in particular an NC-controlled machine tool, includes a clamping element coaxial with the work spindle, a first rotary bearing disposed on the clamping element and coaxial with the rotation axis of the work spindle, a measurement arm with a first pivot bearing having a first pivot axis orthogonal to the rotation axis of the clamping element, a length measurement system disposed in measurement arm with a glass rod with a marking and a reading device, an adjusting device receiving the measurement arm and having a second pivot bearing with a pivot axis aligned parallel to the first pivot axis, a second rotary bearing having a second rotation axis aligned parallel to the rotation axis of the work spindle, and a stator supporting the second rotary bearing.

Abstract: The invention concerns a device for examining the precision of motion of a working spindle of an NC-controlled machine tool along a circular path for producing circular cylindrical surfaces on workpieces, comprising a first device part which can be coaxially mounted to the working spindle, a second device part which can be positioned on a machine table, which receives a workpiece to be processed, coaxially to the axis of a circular cylindrical surface to be produced on the workpiece, an electronic measuring value sensor which extends radially with respect to the axes of working spindle and circular cylindrical surface and is hinged to both device parts, and a shaft encoder which is rotatably disposed in the second device part coaxial relative to the axis of the circular cylindrical surface to be produced to determine the angular position of the measuring value sensor, wherein the measuring value sensor is held on one of the two device parts such that it can be adjusted and fixed transversely to the axes of th

Abstract: The invention concerns a device for examining the precision of motion of a working spindle of an NC-controlled machine tool along a circular path for producing circular cylindrical surfaces on workpieces, comprising a first device part which can be coaxially mounted to the working spindle, a second device part which can be positioned on a machine table, which receives a workpiece to be processed, coaxially to the axis of a circular cylindrical surface to be produced on the workpiece, an electronic measuring value sensor which extends radially with respect to the axes of working spindle and circular cylindrical surface and is hinged to both device parts, and a shaft encoder which is rotatably disposed in the second device part coaxial relative to the axis of the circular cylindrical surface to be produced to determine the angular position of the measuring value sensor, wherein the measuring value sensor is held on one of the two device parts such that it can be adjusted and fixed transversely to the axes of th

Abstract: A device for controlling the accuracy of the orbit along which a work spindle of an NC machine is moved during the manufacture of high-precision circular bores, inner and outer surfaces as well as radii essentially consists of a control unit (1), a clamping element (3) as well as an intermediate piece (2). The clamping element is connected to the work spindle of the machine tool and the control unit is placed on the work table of the machine tool, at the location at which the workpiece is held during the machining. The intermediate piece (2) is formed by a transducer (24) or comprises a transducer. If deviations from the nominal radius occur, the transducer transmits a signal to an amplifier, said signal being amplified and subsequently displayed and/or recorded. A shaft encoder (61) allows the precise determination and, if so required, registration of the respective measuring position. A special routing of the measuring cable and an internal transmission by means of a slip ring (66) and sensors (67), e.g.