Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-12-14

2000-12-26

Nappi, Robert E.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, 399167, H02K 3700

Patent

active

06166510&

ABSTRACT:
In an image forming apparatus which forms images by transferring to a transfer drum a toner image formed on the surface of the photosensitive member directly driven by a stepping motor, the relationship between the stepping angle ".theta." (.degree.) of the stepping motor and the rotational speed "N" (rpm) of the photosensitive drum is expressed by the equation .theta..ltoreq.(360.times.N)/(60.times.a.times.b). Where "a" is a natural number, optimally 10, which is less than the initial predetermined tolerance value when the harmonic content of rotational variation generated by the step period of the stepping motor is "1/a", and "b" is the target frequency (Hz) of 100.

REFERENCES:
patent: 5111242 (1992-05-01), Tanimoto et al.
patent: 5374865 (1994-12-01), Yoshimura et al.
patent: 5477120 (1995-12-01), Yoshimura et al.
patent: 5592261 (1997-01-01), Yoshino
patent: 5659234 (1997-08-01), Cresens
patent: 5726510 (1998-03-01), Yoshimura et al.

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