Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing
Patent
1995-03-08
1996-10-08
Czaja, Donald E.
Glass manufacturing
Processes
With measuring, sensing, inspecting, indicating, or testing
65 2916, 65 72, 65122, 65DIG13, C03B 716
Patent
active
055627471
ABSTRACT:
A method of distributing molten glass gobs in an IS machine whereby gob scoops are positioned beneath associated gob discharges for motion independently of each other. Each scoop is driven by a three-phase electric servo motor to swing through an arc independently of the other scoops while maintaining a position beneath the associated gob discharge. Synchronization of the motors to the operation of glass forming molds of the IS machine is accomplished by coupling a first sensor to each motor to provide a signal indicative of the actual position of the motor, generating a varying signal indicative of a desired position of each scoop, generating a command signal for each motor as a function of the difference between the signal indicative of the desired position of the scoop and the signal indicative of the actual position of the motor, applying the command signal as first and second torque commands to two phases of the three-phase motor, and applying a third torque command to a third phase of the three-phase motor as a function of the sum of the associated first and second torque commands.
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Leidy D. Wayne
Steffan Leonard D.
Czaja Donald E.
Griffin Steven P.
Owens-Brockway Glass Container Inc.
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