Motor driving apparatus, control method therefor, control...

Details Motor driving apparatus, control method therefor, control... Motor driving apparatus, control method therefor, control...

2006-09-05

2006-09-05

Picard, Leo (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C318S685000, C318S696000, C318S560000

Reexamination Certificate

active

07103442

ABSTRACT:
A CPU for a motor driving apparatus of an image forming apparatus excites a predetermined phase winding among plural phases of a stepping motor for a predetermined time period. Thereafter, before a rotation of the motor is started, it is judged whether there is the possibility of deviating a positional relationship between a rotor and a stator of the motor from a positional relationship determined by the excitation of the predetermined phase winding for the predetermined time period, by an external force, on the basis of judgement whether a door is opened for jam treatment. If the possibility of deviation is judged, the predetermined phase winding among plural phases of the stepping motor is excited again for a predetermined time period.

REFERENCES:
patent: 4498665 (1985-02-01), Watanabe
patent: 5990651 (1999-11-01), Iwazawa et al.
patent: 6015202 (2000-01-01), Hiramatsu et al.
patent: 2001/0028235 (2001-10-01), Fukushi et al.

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