Scanner motor controller for controlling the rotating speed of a

Details Scanner motor controller for controlling the rotating speed of a Scanner motor controller for controlling the rotating speed of a

1989-05-26

1990-12-04

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

346160, 346108, 350 68, G05B 1910

Patent

active

049756265

ABSTRACT:
A scanner motor controller for a laser printer or the like having a polygonal rotating mirror rotated by a scanner motor to reflect a laser beam for scanning operation. The scanner motor controller comprises a rotating speed control circuit for controlling the scanner motor for operation at a constant rotating speed on the basis of phase deviation and frequency deviation of a FG pulse signal generated by the scanner motor from a reference clock, and a rotating speed varying circuit for varying the rotating speed of the scanner motor within one turn of the polygonal rotating mirror.

REFERENCES:
patent: 4410234 (1983-10-01), Mikami et al.
patent: 4620200 (1986-10-01), Fukai

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