Multi-speed analog servo

Details Multi-speed analog servo Multi-speed analog servo

1983-11-22

1988-01-26

Dobeck, Benjamin

Electricity: motive power systems

Positional servo systems

With stabilizing features

318561, G05B 501

Patent

active

047218959

ABSTRACT:
An analog servo system suitable for accurately controlling the carriage speed of a high speed printer over a relatively wide range. The system includes an analog tachometer with circuit means which enables the tachometer to operate in either a high gain mode (used at normal or lower carriage speeds) or a low gain mode (used at higher carriage speeds). The tachometer gain mode (or "electronic gear") is controlled by an external command signal such as a single bit supplied by the control microprocessor of the printer. The state of the command signal controls a time constant in the tachometer circuit means which determines the gain mode.

REFERENCES:
patent: 3927360 (1975-12-01), MacMullen
patent: 3986091 (1976-10-01), Quiogue et al.
patent: 4016469 (1977-04-01), Lanni et al.
patent: 4241300 (1980-12-01), Hayes et al.
patent: 4282469 (1981-04-01), Moriyama
patent: 4523137 (1985-06-01), Wong
patent: 4529325 (1985-07-01), Moon
patent: 4551664 (1985-11-01), Wong et al.
"The Solution to Extremely Slow Motion Control", by Lamar Cowger, Drives & Controls International, Jan. 1982, pp. 7, 86-87.

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