Method and apparatus for driving a stepping motor using digital

Details Method and apparatus for driving a stepping motor using digital Method and apparatus for driving a stepping motor using digital

1997-10-07

1999-06-29

Eickholt, Eugene

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

400903, 318685, 318696, B41J 1930, H02P 800

Patent

active

059158611

ABSTRACT:
The method for driving a stepping motor for printers comprises the generation of first pulses (16A,16B) at n levels recorded in registers and representing a simulation of sinusoidal waves. The maximum level is applied during two consecutive microsteps to one of the phases of the motor, while the level of the other phase changes sign. During a motor stopping command, second pulses (VCA,VCB) are applied to the registers and to the two phases of the motor and are programmed so as to ensure, during the last microstep, an exact stopping position, such that all the stopping positions are kept apart by a whole number of half steps. Very precise, fast and noise-free printing is thus attained. The resolution is doubled, without any loss of precision or speed.

REFERENCES:
patent: 4631657 (1986-12-01), Hill et al.
patent: 4706008 (1987-11-01), Cronch et al.
patent: 4707649 (1987-11-01), Kanemura
patent: 4928050 (1990-05-01), Torisawa et al.
patent: 5547295 (1996-08-01), Kanemitso

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