Motor control apparatus with controlled input current

Details Motor control apparatus with controlled input current Motor control apparatus with controlled input current

2005-09-16

2009-06-16

Mackey, Patrick H (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S265010

Reexamination Certificate

active

07547016

ABSTRACT:
A motor control apparatus which is capable of controlling driving currents for stepping motors with efficiency. A feedback stepping motor drives sheet feed rollers located most upstream on a sheet conveying path out of a plurality of rollers. A normal stepping motor drives sheet feed rollers located downstream on the sheet conveying path out of the plurality of rollers. A maximum current value required by the feedback stepping motor when a sheet is conveyed is detected. A driving current value for the normal stepping motor is set to a value according to the maximum current value before the sheet enters the downstream sheet feed rollers after passing the upstream sheet feed rollers.

REFERENCES:
patent: 5625262 (1997-04-01), Lapota
patent: 2003/0235450 (2003-12-01), Okamoto et al.
patent: 2004/0223797 (2004-11-01), Ueda
patent: 2006/0022401 (2006-02-01), Akiyama et al.
patent: 2008/0232880 (2008-09-01), Noguchi et al.
patent: 2001-310842 (2001-11-01), None
patent: 2001-322734 (2001-11-01), None
patent: 2002-211786 (2002-07-01), None

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