Browse Prior Art Database

Floppy Disk Testing

IP.com Disclosure Number: IPCOM000062085D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Blazon, WH: AUTHOR [+3]

Abstract

Floppy magnetic recording disks are full-surface tested by an automatic machine which includes an input queue of disks, a pass-through diskette cartridge whereat four magnetic recording heads operate on different annular track bands, and an output station whereat good disks are inserted in a conventional diskette cartridge and bad disks are rejected to a reject bin. Fig. 1 is a side view of this testing device. An untested disk is transported to the tester in transport bin 10. A disk drops into slot 11, and into the top of tester area 12. Retracting pins 13 allow the disk to drop into testing cartridge area 14, where a pair of pins 18 catch the bottom surface of the disk to be tested. The disk is thus positioned for clamping to collet 15. Collet 15 is moved by solenoid 16. A motor 17 then spins the colleted disk. Fig.

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Floppy Disk Testing

Floppy magnetic recording disks are full-surface tested by an automatic machine which includes an input queue of disks, a pass-through diskette cartridge whereat four magnetic recording heads operate on different annular track bands, and an output station whereat good disks are inserted in a conventional diskette cartridge and bad disks are rejected to a reject bin. Fig. 1 is a side view of this testing device. An untested disk is transported to the tester in transport bin 10. A disk drops into slot 11, and into the top of tester area 12. Retracting pins 13 allow the disk to drop into testing cartridge area 14, where a pair of pins 18 catch the bottom surface of the disk to be tested. The disk is thus positioned for clamping to collet 15. Collet 15 is moved by solenoid 16. A motor 17 then spins the colleted disk. Fig. 2 shows the center of rotation 20 of the disk, and shows four sliders 21, 22, 23 and 24 which carry magnetic recording heads which are used to test the colleted disk. These heads are radially positioned relative to the disk by a cam 25 which is stepped by operation of stepping motor
26. Each head cooperates with a different annular area of the colleted disk, such that the disk's entire surface is tested. When testing is complete, pins 18 move to the right (Fig. 1), and the tested disk drops vertically down (see arrow 27). If the disk is bad, it enters a reject bin 28. If the disk is good, it enters a cartridge at 27 which is posi...