Method of calibrating a step motor

Details Method of calibrating a step motor Method of calibrating a step motor

1991-05-29

1994-05-10

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, G05B 1940

Patent

active

053111117

ABSTRACT:
A method for calibrating a microstep motor comprising a step motor having a plurality of stator coils, a pair of drivers for applying respective driving voltages to the stator coils. Amplitude adjustment means are coupled to each of the drivers for adjusting the amplitudes of the respective driving voltages and offset adjustment means are coupled to each of the drivers for adjusting the d.c. offsets of the respective driving voltages. The method permits compensation for non-linearities associated with the stator coils, and comprises the steps of adjusting at least one of the amplitude adjustment means a predetermined amount, so as to produce a signal having a specified amplitude, measuring an imbalance of the motor, adjusting the offset and amplitude adjustment means as required in order to reduce the measured imbalance, and iteratively repeating the offset and amplitude adjustments as required until no further reduction in the measured imbalance is possible.

REFERENCES:
patent: 4455520 (1984-06-01), Ward et al.
patent: 4584512 (1986-04-01), Pritchard
patent: 4710691 (1987-12-01), Bergstrom et al.
patent: 4929879 (1990-05-01), Wright et al.

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