Abstract: A coordinate measuring machine comprising a movable part, a drive and drive controller, and a position measuring system for measuring position values of the movable part. Intended values produced by the drive controller are supplied to a computational model (MOD) of a computational device. The intended values respectively predetermine an intended state of the drive. Position deviations (?s) are formed between the measured position values (s) and position estimates of the computational model (MOD). The position estimates are produced by the computational model (MOD) for a predetermined location at the movable part. Acceleration values are measured by an acceleration sensor arranged at a location at the movable part. Acceleration deviations (?a) are formed between the measured acceleration values (a) and acceleration estimates of the computational model (MOD).

Abstract: A system and a method for reliably monitoring a parameter, in particular a moment of inertia, required for determining a kinetic energy of an object that can be measured by means of a sensor of a coordinate measuring machine. The object is moved between various positions, with the object preferably being at least briefly at rest in each of the approach positions.

Abstract: A system and a method for reliably monitoring a parameter, in particular a moment of inertia, required for determining a kinetic energy of an object that can be measured by means of a sensor of a coordinate measuring machine. The object is moved between various positions, with the object preferably being at least briefly at rest in each of the approach positions.

Abstract: A coordinate measuring machine comprising a movable part, a drive and drive controller, and a position measuring system for measuring position values of the movable part. Intended values produced by the drive controller are supplied to a computational model (MOD) of a computational device. The intended values respectively predetermine an intended state of the drive. Position deviations (?s) are formed between the measured position values (s) and position estimates of the computational model (MOD). The position estimates are produced by the computational model (MOD) for a predetermined location at the movable part. Acceleration values are measured by an acceleration sensor arranged at a location at the movable part. Acceleration deviations (?a) are formed between the measured acceleration values (a) and acceleration estimates of the computational model (MOD).

Abstract: In a method for reliably monitoring the speed of a moveable coordinate measuring device, a first value of the speed is calculated from measured values of the coordinate measurement system. The measured values contain information on positions of the coordinate measuring device. The measured values are further used to determine the coordinates of a measurement object. A second value of the speed is ascertained from measurement signals of at least one additional movement sensor. The measurement signals can also be used for controlling a drive device of the coordinate measuring device. A fault signal can be generated if the first value and/or the second value deviate from one another, from a predetermined value and/or a limit value according to a predefined criterion.

Abstract: In a method for operating a coordinate measuring machine and to a coordinate measuring machine, a coordinate measuring device, of the coordinate measuring machine is moved in at least one direction while being driven by an electric motor. An electrical drive current which flows through the electric motor for moving the electric motor and, move the coordinate measuring device is measured. A limit value for the electrical drive current is determined on the basis of a desired speed and/or on the basis of a desired acceleration with which the electric motor or the coordinate measuring device is intended to move. If the electrical drive current reaches the limit value determined and/or if the electrical drive current exceeds the limit value determined, the coordinate measuring device is changed to a predefined state, by virtue of the computer or the microcontroller switching off one of the switches disposed in the current path.

Abstract: In a method for reliably monitoring the speed of a moveable coordinate measuring device, a first value of the speed is calculated from measured values of the coordinate measurement system. The measured values contain information on positions of the coordinate measuring device. The measured values are further used to determine the coordinates of a measurement object. A second value of the speed is ascertained from measurement signals of at least one additional movement sensor. The measurement signals can also be used for controlling a drive device of the coordinate measuring device. A fault signal can be generated if the first value and/or the second value deviate from one another, from a predetermined value and/or a limit value according to a predefined criterion.

Abstract: In a method for operating a coordinate measuring machine and to a coordinate measuring machine, a coordinate measuring device, of the coordinate measuring machine is moved in at least one direction while being driven by an electric motor. An electrical drive current which flows through the electric motor for moving the electric motor and, move the coordinate measuring device is measured. A limit value for the electrical drive current is determined on the basis of a desired speed and/or on the basis of a desired acceleration with which the electric motor or the coordinate measuring device is intended to move. If the electrical drive current reaches the limit value determined and/or if the electrical drive current exceeds the limit value determined, the coordinate measuring device is changed to a predefined state, by virtue of the computer or the microcontroller switching off one of the switches disposed in the current path.

Abstract: A method for correcting errors in a coordinate measuring machine having a measuring head which is adapted to move in at least two different spatial directions. Measuring scales and measuring lines are assigned to each spatial direction. The measuring lines of different spatial directions intersect, and correction values are determined along the measuring lines at predetermined values of the scales in order to correct for elastic and/or geometric errors of the scales and/or of the guiding mechanism for moving the measuring head. According to one aspect of the invention, the correction values determined along a measuring line of a first spatial direction are modified such that the modified correction value of this measuring line assumes a predetermined value at the point of intersection with a first measuring line of a second spatial direction.

Abstract: The invention is directed to a method for determining the weight of a probe of a coordinate measuring machine wherein the probe is connected to a probe head (1) of the machine. The machine includes a control unit and the weight of the probe (3) is preferably statically determined without active control of the movement of the probe. Signals from the probe (3) and/or the probe head (1) are supplied to the control unit (51).

Abstract: The invention is directed to a method which is provided for controlling coordinate measuring apparatus wherein a probe head (2) is moved and has a movably attached probe unit (24) attached thereto. The probe unit (24) is charged with a measurement force Fmeas relative to the probe head (2). The measurement force Fmeas operates against the mass inertial forces Fzp which occur because of acceleration of the probe. The measurement force Fmeas is comprised of a desired measurement force Fdes and a corrective measurement force Fcorr. The desired measurement force Fdes is constant in magnitude and is directed perpendicularly to the surface of the workpiece (15) to be measured. The corrective measurement force Fcorr at least partially compensates for the mass inertial forces (Ftr, Fzp) which occur because of the acceleration of the probe unit (24).

Abstract: A sensor in the probe head of a coordinate measuring device supplies probe signals. The first, and if necessary, higher time derivatives of the probe signals are formed and evaluated for the exact determination of the moment of contact of the probe head with a workpiece to be measured. During the evaluation, the time course of the differentiated signals is examined by means of automatically generated trigger thresholds.

Abstract: A coordinate measuring apparatus for measuring a workpiece with a probe head having a probe element for contacting the workpiece. The coordinate measuring apparatus includes: a plurality of sensors with each sensor supplying a signal indicative of a coordinate measurement position and a processing unit. An interface device between the plurality of sensors and the processing unit receives the signals and supplies a plurality of output signals to the processing unit representing respective position measurement values at any given instant of time. The processing unit includes at least one smoothing function block for continuously receiving a portion of the position measurement values. The smoothing function block is adapted to determine a final position measurement value (X.sub.E, Y.sub.E, Z.sub.E or R.sub.E) of the contact point of the probe element on the workpiece in a defined standstill of the apparatus by averaging a defined number of the received position measurement values to form a mean value.

Abstract: The method is used to determine the elastic bending behavior of coordinate measuring machines as a result of the measuring force and the position of measuring slides in the measuring range of the machine. Correction values are determined, which are used to compensate for measuring errors caused by machine bending. The correction values are a function of the position of the measuring slides and on the measuring force between the probe of the coordinate measuring machine and workpieces within the measuring range, and are established and stored for several positions. The method can be combined very advantageously with known methods for the correction of guideway errors, which were developed on the basis of a rigid model, and with methods for the dynamic correction of machine deviations caused by vibration of machine components.

Abstract: Measured position data (Px, Py, Pz) are combined with stored correction values (DB) describing the elastic bending behavior of a coordinate measuring machine in that parameters characterizing the bending behavior are determined for several positions of the probe of the machine within the measuring range (30) of the machine, the acceleration-dependent components of these parameters are determined and stored in the form of correction values (c11, c22) which describe the bending behavior of the coordinate measuring machine as a function of the position (Px, Py, Pz) of measuring slides (22, 23, 24), and at least of the acceleration (ax, ay, az) of the measuring slides introduced via the drives, the correction values being combined with measured position data (Px, Py, Pz) of the coordinate measuring machine in subsequent coordinate measurements on workpieces.

Abstract: A computer-operated coordinate-measurement machine has two length-measurement systems arranged in parallel for measuring the longitudinal displacement of a probe carried by the portal (3-5) of the machine, and these two length-measurement systems (13, 14) may belong to different precision classes. A computer-associated device (16) forms an absolute position-measurement value (Ym) from length-measurement signals of the more precise measurement system (13) and said device forms a dynamic measurement or instantaneous deviation value (Ys-Ym) from the difference between length-measurement signals of the respective systems (13, 14). The computer of the machine calculates the effective instantaneous position (Ym+.DELTA.y) of the probe (9a, b, c) borne by the portal (3-5), using the instantaneous value of the transverse position of the probe on the portal, in conjunction with the absolute measurement value (Ym) and the dynamic measurement value (Ys-Ym).

Abstract: A method of potentiating the effect of a dihydropyridine derivative, such as nimodipine or nifedipine, by administering d-cis-diltiazem in an amount sufficient to inhibit calcium influx but insufficient to cause substantial decrease in contractility, and administering a dihydropyridine derivative in a submicromolar amount less than the dosage normally required for pharmacological effectiveness. A calcium channel blocking composition comprises a synergistic combination of d-cis-diltiazem and a dihydropyridine derivative.