초록 ▼

An apparatus for determining the placement of mass adjustment on a work piece by a centrifugal balancer includes a device incremented by pulses representing angular displacement of the work piece derived from a device responsive to system drive motor rotation and the drive motor-to-work piece rotati

An apparatus for determining the placement of mass adjustment on a work piece by a centrifugal balancer includes a device incremented by pulses representing angular displacement of the work piece derived from a device responsive to system drive motor rotation and the drive motor-to-work piece rotation ratio for providing the angular position of the work piece relative to a reference point on the work piece.

대표청구항 ▼

[ What is claimed is:] [18.] A method of balancing a work piece, including the steps of:1) energizing a motor;2) coupling the rotational force of said motor to said work piece whereby said work piece is rotated;3) monitoring the angular velocity of said work piece using an incremental encoder which

[ What is claimed is:] [18.] A method of balancing a work piece, including the steps of:1) energizing a motor;2) coupling the rotational force of said motor to said work piece whereby said work piece is rotated;3) monitoring the angular velocity of said work piece using an incremental encoder which produces a train of pulses;4) generating a balance speed signal when step 3) indicates a constant angular velocity for a predetermined time period;5) monitoring the passage of a reference mark on said work piece;6) accumulating the individual pulses of said train of pulses in a counter when step 5) indicates reference mark passage after said balance speed signal has been generated;7) reading the accumulated pulse count after each reference mark passage;8) determining a number of pulses accumulated for one complete revolution of the work piece from the accumulated pulse count readings;9) determining mass adjustment value and position in response to said balance speed signal;10) deenergizing said motor;11) verifying motor deenergization by determining if the motor angular velocity is reducing;12) advancing to step 13) if motor is deenergized;13) resetting said counter means and beginning to accumulate the individual pulses of said train of pulses in said counter means when said step of monitoring the passage of a reference mark indicates reference mark passage after said motor deenergization has been verified;14) monitoring a vibration responsive transducer filter output for a zero crossing signal and storing the accumulated value of said counter means upon detection of said zero crossing signal if another reference mark passage has not been detected since the beginning of the present step;15) upon sensing the next reference mark passage, repeating step 13), until a predetermined number of stored accumulated counter values have been obtained;16) determining if the stored accumulated counter values are equal;17) if the stored accumulated counter values are equal, accepting their averaged value as the angular displacement from the reference mark for mass adjustment and converting the count to angular displacement of the work piece; and18) if the stored accumulated counter values are not equal, repeating the sequence of steps beginning with step 13) of beginning mass adjustment angular position determination;19) manually rotating said work piece when the apparatus inertia fails to rotate said work piece an angular distance required for pulse counter/work piece synchronization as indicated by successful completion of step 18); and20) displaying the position of mass adjustment required for balancing based on synchronization derived by said manual rotation of said work piece.