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Test Cartridge for Measuring Cleaning Bail Force in a Diskette Drive

IP.com Disclosure Number: IPCOM000046595D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Alstad, JK: AUTHOR [+3]

Abstract

In a hard diskette cartridge, a cleaning bail pushes a cleaning pad mounted in the cartridge against the floppy disk within the cartridge. It is necessary to precisely set the cleaning bail force at the proper actuation distance so as to clean the floppy disk without providing too much drag on the rotation of the disk. The test cartridge, shown above, may be inserted into a diskette drive containing the bail and is used to measure the bail force. The test cartridge has a bail force sensing arm with a strain gauge to measure the force. With the test cartridge inserted in the diskette drive, the cleaning bail probe is activated and pushes against tip 10 of bail sensor arm 12. The shape of the sensor arm 12 is designed to have a predetermined strain function along a portion of its length as the arm is deflected.

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Test Cartridge for Measuring Cleaning Bail Force in a Diskette Drive

In a hard diskette cartridge, a cleaning bail pushes a cleaning pad mounted in the cartridge against the floppy disk within the cartridge. It is necessary to precisely set the cleaning bail force at the proper actuation distance so as to clean the floppy disk without providing too much drag on the rotation of the disk. The test cartridge, shown above, may be inserted into a diskette drive containing the bail and is used to measure the bail force. The test cartridge has a bail force sensing arm with a strain gauge to measure the force. With the test cartridge inserted in the diskette drive, the cleaning bail probe is activated and pushes against tip 10 of bail sensor arm 12. The shape of the sensor arm 12 is designed to have a predetermined strain function along a portion of its length as the arm is deflected. A strain gauge mounted in this portion of the arm will generate a signal whose strength is a measure of the force applied to tip 10 of arm 12. Meter 16, electrically connected through a bridge circuit amplifier to strain gauge 14, provides a meter reading that varies directly with the bail force applied to tip 10. An operator may then determine if the bail force is within acceptable limits by reading the meter.

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