Error-correction apparatus for step-motor transmission...

Details Error-correction apparatus for step-motor transmission... Error-correction apparatus for step-motor transmission...

2005-11-22

2005-11-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S632000

Reexamination Certificate

active

06967460

ABSTRACT:
An error-correction method and apparatus are used for a step motor transmission system. The step motor has a plurality of inductor coils therein for rotating an internal shaft thereof. A rotational error gamma table is established by measuring an error value for each rotational step of the step motor. The error-correction apparatus receives an external digital displacement signal for producing a rotational step signal. A compensation current is produced according to the rotational step signal and an error value in the rotational error gamma table. The inductor coils are driven by the compensation current to rotate the internal shaft precisely.

REFERENCES:
patent: 4706008 (1987-11-01), Cronch et al.
patent: 5084661 (1992-01-01), Tanaka
patent: 5291111 (1994-03-01), Hirano
patent: 5711507 (1998-01-01), Berget et al.
patent: 5770937 (1998-06-01), Tsuda et al.

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