Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1977-03-21
1978-06-13
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318 39, 425135, G05B 1924
Patent
active
040951561
ABSTRACT:
A device for automatic dimension control of extruded blanks comprises a means for measuring the blank width, having its output connected to an input of a third adder whose second input is connected to a means for presetting the blank dimensions and whose output is connected to the input of an amplifier-converter, a motor for driving the screw of an extruder, with an extruder screw rpm sensor, a motor for driving a drawing-off device, with a draw-off speed sensor, a means for presetting the draw-off speed, a first adder whose inputs are connected, respectively, to a means for presetting the extruder screw rpm and to said extruder screw rpm sensor and whose output is connected, via a first amplifier, to said screw drive motor, a second adder whose first input is connected to said draw-off speed sensor and whose output is connected, via a second amplifier, to said drawing-off device drive motor, a nonlinearity unit, a compensator unit, and a fourth adder whose first input is connected to the output of the compensator unit having its input connected to the extruder screw rpm sensor, the second input of the nonlinearity unit being connected to the extruder screw rpm sensor and receiving a bias voltage, while the first input of the nonlinearity unit is connected to the output of the fourth adder, the output of the amplifier-converter is connected to the second input of the fourth adder, and the outputs of the nonlinearity unit and draw-off speed presetting means are connected to the first input of the third adder via a switch.
REFERENCES:
patent: 3513501 (1970-05-01), Hearns
patent: 3693064 (1972-09-01), Kiwiet
patent: 3887314 (1975-06-01), Andresen et al.
Akhmedzhanov Ravil Abdrakhmanovich
Borisov Vladimir Alexeevich
Chistyakov Jury Vsevolodovich
Adams Bruce L.
Burns Robert E.
Dobeck B.
Lobato Emmanuel J.
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