Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Reexamination Certificate
2011-01-11
2011-01-11
Benson, Walter (Department: 2837)
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
C318S696000
Reexamination Certificate
active
07868579
ABSTRACT:
In a micro-step drive and driving method of a stepping motor, the stepping motor generates a drive force for movement on a prescribed path of a moving unit provided in an electrically driven device, a standard point and a target point of an operation are set on the path, the stepping motor is rotated such that the moving unit passes through the standard point, a count value of a stable stop point of the stepping motor that is closest to a count value at the point of time when the moving unit passed through the standard point is specified, the specified count value is set as a start point for controlling a rotation angle of the stepping motor, and the stepping motor is rotated, and stopped at the count value of the selected stable stop point.
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Official communication issued in counterpart Japanese Application No. 2007-170486, mailed on Mar. 3, 2009.
Benson Walter
Colon Eduardo
Keating & Bennett LLP
Murata Machinery Ltd.
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