Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2008-02-15
2010-12-07
Ip, Paul (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S006000, C318S016000, C318S266000
Reexamination Certificate
active
07847496
ABSTRACT:
Dynamic calibration of a secondary velocity signal is provided in a tape drive. In one example, a reel motor is operated to drive a reel carrying a tape in a tape drive. The motion of the tape is measured to provide a measured primary velocity signal of the tape, and in addition, the operation of the reel motor is measured to provide an estimated secondary velocity signal of the tape as a function of motor parameters and the motor operation measurements. The estimated secondary velocity signal of the tape may be calibrated as the tape is driven, as a function of the tape motion measurements and the motor operation measurements. Other embodiments are described and claimed.
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Bui Nhan Xuan
Hancock Reed Alan
Imaino Wayne Isami
Zhao Haiyu
International Business Machines - Corporation
Ip Paul
Konrad Raynes & Victor LLP
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