Apparatus, system, and method for dynamic tape stick and tape break detection
AssigneeInternational Business Machines Corporation
InventorsNhan Xuan Bui, Reed Alan Hancock, Eiji Ogura, Kazuhiro Tsuruta
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Abstract
An apparatus, system, and method are disclosed for dynamic tape stick and tape break detection. A first counter increments a first count and resets a second count in response to a sensor pulse from a first sensor of a first tape servo. A second counter increments the second count and resets the first count in response to a sensor pulse from a second sensor of a second tape servo. A detection module detects either the first count or the second count exceeding an error threshold.
Claims20
An apparatus to detect tape sticking, the apparatus comprising:
- a first counter configured to increment a first count and reset a second count in response to a sensor pulse from a first sensor of a first tape servo;
- a second counter configured to increment the second count and reset the first count in response to a sensor pulse from a second sensor of a second tape servo;
- and
- a detection module configured to detect either the first count or the second count exceeding an error threshold.
A method to detect stuck tape, the method comprising:
- incrementing a first count and resetting a second count in response to a sensor pulse from a first sensor of a first tape servo;
- incrementing the second count and resetting the first count in response to a sensor pulse from a second sensor of a second tape servo;
- and
- detecting either the first count or the second count exceeding an error threshold.
A system to detect tape sticking, the system comprising:
- a first reel configured to spool a tape;
- a first tape servo configured to motivate the first reel;
- a first Hall effect sensor configured to measure angular displacement of the first reel;
- a second reel configured to spool the tape;
- a second tape servo configured to motivate the second reel;
- a second Hall effect sensor configured to measure angular displacement of the second reel;
- a first counter configured to increment a first count and reset a second count in response to a sensor pulse from the first Hall effect sensor;
- a second counter configured to increment the second count and reset the first count in response to a sensor pulse from the second Hall effect sensor;
- and
- a detection module configured to detect either the first count or the second count exceeding an error threshold.
A computer program product comprising a computer useable medium having a computer readable program stored on a tangible storage device, wherein the computer readable program when executed on a computer causes the computer to:
- increment a first count and reset a second count in response to a sensor pulse from a first sensor of a first tape servo;
- increment the second count and reset the first count in response to a sensor pulse from a second sensor of a second tape servo;
- and
- detect either the first count or the second count exceeding an error threshold, wherein the error threshold is calculated as an integer value of a product of pulses per revolution from the sensor, a rotational limit, and a maximum radius ratio value, where the maximum radius ratio value is a ratio to one of reel radiuses.
Dependencies are inferred from the claim text.