Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1986-12-29
1988-05-03
Shoop, Jr., William M.
Electricity: motive power systems
Open-loop stepping motor control systems
318685, 400605, G05B 800
Patent
active
047422874
ABSTRACT:
A motor driving device in a printer wherein a selection signal for carrying out the driving selection of the respective stepping motors in outputted from a control circuit to the stepping motor for an automatic paper feeding mechanism of forms which comprises one of two driven sections and an other stepping motor for a form feeding mechanism which comprises the other driving section in a printer to select one of these motors through drive selection elements corresponding to respective stepping motors, and in which a phase control signal is successively sent to phase current flowing elements provided commonly in the same phase coils or both stepping motors, respectively, and the switching operation of the phase coils of the selected stepping motor is carried out to rotate and drive said motor, and the rotation position of said motor is always recognized by memorizing the corresponding data of each output of said phase control signal, and after the other motor has been selectively driven, in selecting said one stepping motor again, the memorized data are read out to output a phase control signal corresponding to the rotation position of said motor.
REFERENCES:
patent: 4055786 (1977-10-01), DiMarzio
patent: 4401931 (1983-08-01), Kulterman et al.
patent: 4663722 (1987-05-01), Sato
Okamori Shuhei
Yokoi Takeshi
Bergmann Saul M.
Bierman Jordan B.
Brother Kogyo Kabushiki Kaisha
Shoop Jr. William M.
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