Abstract: An unbalance measuring machine has an arrangement for clamping and release a motor vehicle wheel or other rotary member on a motor-driven shaft. The machine has a bar which is guided movably in the shaft in its axial direction. The bar is engaged at one end with the rotary member and at the other end with a belt pulley via interengaged screw threads. When the belt pulley is driven by the drive motor in one direction of rotation, the bar axially clamps the rotary member on the shaft to hold it fast. When the belt pulley is driven by the drive motor in the other direction, the bar moves in the opposite direction to release the rotary member.

Abstract: A method and device for balancing an unbalance on a motor vehicle wheel, including a tire mounting portion that is provided with a stylized design. Such a wheel can include a supporting disk with openings therein defining radially extending, spaced apart support members, such as struts or spokes, in the main area of the wheel. In particular such a tire supporting disk can comprise light metal. The angular positions of the radially extending support members are determined and are stored in storage 2 and the measurement values determined in the measurement procedure are divided into balancing corresponding to the angular positions of the radially extending support members. Weights for balancing the wheel are determined and are attached to the supporting disk at angular positions corresponding to the locations of the support members.

Abstract: An apparatus and method for correcting unbalance of a motor vehicle wheel by at least one balancing weight has a sensor for sensing at least one predetermined position on the wheel, a position detector connected to the sensor for detecting the position thereof, and a storage device connected to the position detector for storing position data determining actual balancing positions on the wheel. An electronic evaluator is connected to a measuring arrangement for measuring wheel unbalance requiring correction and to the storage device for determining the balancing position and the magnitude of the respective balancing weight to be fixed to the wheel. A comparator is connected to the storage device and the position detector. In a retrieval mode, when the sensor reaches a position which corresponds to a stored balancing position a clamping device receives a clamping signal from the comparator for at least partially blocking displacement of the sensor.

Abstract: In a balancing machine having an apparatus for sensing geometrical data of a rotary member to be balanced such as a motor vehicle wheel which can be clamped on a main shaft of the balancing machine, the apparatus has a measuring sensor arranged on a support bar of the balancing machine, which is parallel to the main shaft and fixed in its longitudinal direction. The measuring sensor is rotatable about the longitudinal axis of the support bar and has a pivot head which is arranged on the support bar rotatably about the longitudinal axis of the support bar. The sensor also has a measuring sensing lever having a positively guided sensing head, wherein the measuring sensing lever is mounted pivotably on the pivot head and a sensing finger on the sensing head is movable toward and away from the wheel to be sensed, upon a pivotal movement of the measuring sensing lever, in parallel orientation with respect to the main shaft.

Abstract: A method of correcting unbalance on a motor vehicle wheel by means of at least one balancing weight which can be fixed to the wheel at appropriate positions ascertained by an electronic measuring apparatus during an unbalance measuring procedure involves the use of a sensing device which is coupled to the electronic measuring apparatus and which senses relevant dimensions of the wheel for storage thereof in the electronic measurement apparatus, for evaluation of the measurement values obtained in the unbalance measuring procedure.

Abstract: An operating circuit for use in an apparatus for measuring unbalance of a rotary member in which the drive for the rotary member is by means of a single-phase ac motor with a single-phase main winding and an auxiliary winding which is electrically displaced through 90.degree.. Under at least approximately load-free operating conditions, a capacitor is connected in parallel with the auxiliary winding to reduce fluctuating angular speeds of the rotor of the motor when the motor is operating in an approximately load-free condition.

Abstract: A process and an apparatus for the input of parameters of a rotary member to be balanced, such as a vehicle wheel, into an evaluation unit of a balancing machine in which a rotary member to be balanced is mounted on a main shaft and the respective rotary angular positions of the main shaft are monitored in angular steps by means of an angle sensor, and reproduced. For input of the parameters of a rotary member requiring balancing, the main shaft is rotated and signal produced by the angle sensor in the rotary movement of the main shaft is used to alter the respective value of the parameter being displayed, with the main shaft being rotated until the desired value in respect of the parameter in question is displayed.

Abstract: An apparatus for measuring unbalance on a rotary member such as a motor vehicle wheel comprises a drive motor for driving a main shaft carrying the rotary member, by way of a reduction transmission means having a self-locking action so that the main shaft can be braked by the self-locking action after an unbalance measuring run. The self-locking action of the reduction transmission means also serves to resist a rotary moment applied to the main shaft when tightening or loosening a clamping arrangement with which the rotary member is clamped on the main shaft, so that the main shaft remains in a stationary position during that operation.

Abstract: A method and a circuit arrangement for stopping the test run of a rotor being balanced, in particular a rotor for a motor vehicle wheel. Upon the application of an armature disk of an electromagnetic brake to a friction lining, the electromagnet coil of the brake is supplied with a reduced supply current, so that a reduced braking moment by comparison with the rated braking moment is attained.

Abstract: An apparatus for measuring imbalance of rotors, in particular motor vehicle wheels, having a primary shaft driven by an electric motor. The rotor to be tested is secured to the primary shaft with the aid of a clamping device, which transmits the drive torque transmitted to the primary shaft to the rotor by means of friction. The apparatus includes a time-controlled brake, which when the electric motor is switched on reduces the drive torque in a time-controlled manner until the rush moment fades. As a result, loosening of the clamping device is prevented and a gentle start is assured.

Abstract: A method for displaying the amount of unbalance during rotation of a rotor, preferably in two correction planes, includes adjustment of the amounts of unbalance determined during measurement by a factor obtained during calibration. The method is characterized by measuring unbalance forces of known magnitude and comparing them with predetermined nominal data identical to the known unbalance forces during measurement, and by adjusting the amounts of unbalance of the rotor determined during measurement by the result of the above comparison. The apparatus of the invention comprises an unbalance measuring device, data memories for providing nominal reference data, comparator circuits for comparing the measured values derived from an auxiliary shaft with the nominal reference data to determine adjustment values, and multiplier circuits for adjusting the measured values derived from the main shaft in accordance with the adjustment values.