Method and apparatus for registering a sheet with an image-beari

Details Method and apparatus for registering a sheet with an image-beari Method and apparatus for registering a sheet with an image-beari

1996-01-03

1998-03-24

Martin, David S.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

399396, 400902, 271226, G05B 1940

Patent

active

057316805

ABSTRACT:
An apparatus and method for control of a stepper motor drive for controlling movement of a receiver sheet into transfer relationship with an image-bearing member that supports an image to be transferred to the receiver sheet. Initially, the stepper motor is driven by drive pulses generated in response to clock pulses not synched with movement of the member. However, in order to ensure accurate registration, stepper motor drive pulses are subsequently generated that are in sync with encoder clock pulses that are generated in response to movement of the member. The transition of generation of the drive pulses is determined by establishing a condition of concurrence of a non-synched stepper motor drive pulses with an edge of an encoder pulse. The term condition of concurrence may be established by generating a timing control pulse of relatively short pulsewidth to define an allowed period for determining the condition of concurrence.

REFERENCES:
patent: 4591969 (1986-05-01), Bloom et al.
patent: 5126764 (1992-06-01), Miyauchi et al.
patent: 5177422 (1993-01-01), Kataoka et al.
patent: 5322273 (1994-06-01), Rapkin et al.

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