Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Reexamination Certificate
2006-12-05
2006-12-05
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
C425S150000
Reexamination Certificate
active
07144238
ABSTRACT:
A servo motor control apparatus comprises a motion control unit for generating a position command; a first drive amplifier connecting with the motion control unit, for receiving the command to drive a first servo motor, and forming a first position control loop together with the motion control unit and the first servo motor; and at least one second drive amplifier connecting with the motion control unit, for receiving the command to drive at least one second servo motor, and forming a second position control loop together with the motion control unit and the second servo motor. The motion control unit comprises at least one synchronous controller, which receives and performs calculations to a difference value between position errors of the first and second position control loops for serving as speed and torque feed forward compensations to keep said second servo motor synchronous with the first servo motor.
REFERENCES:
patent: 4735564 (1988-04-01), Sasaki et al.
patent: 4820464 (1989-04-01), Sasaki et al.
patent: 5362222 (1994-11-01), Faig et al.
patent: 6046566 (2000-04-01), Sonoda et al.
patent: 6142760 (2000-11-01), Niizeki et al.
Heitbrink Tim
Industrial Technology Research Institute
Rabin & Berdo P.C.
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