ANSI INCITS ISO 3562-1976 Information processing - Interchangeable magnetic single-disk cartridge (top loaded) - Physical and magnetic characteristics.pdf

1、 INCITS/ISO 3562:19762010 (ISO 3562:1976, IDT) Information processing - Interchangeable magnetic single-disk cartridge (top loaded) - Physical and magnetic characteristics Reaffirmed as INCITS/ISO 3562:1976 R2015INCITS/ISO 3562:19762010 PDF disclaimer This PDF file may contain embedded typefaces. In

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4、 printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Adopted by INCITS (InterNational Committee for Information Technology

5、 Standards) as an American National Standard. Date of ANSI Approval: 9/29/2010 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyri

6、ght claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an el

7、ectronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Washington DC 20005. Printed in the United States of America ii ITIC 2010 All rights reserved CONTENTS 1 Scope and field of applic

8、ation . 2 General description . 3 General requirements 4 Physical requirements 5 Magnetic requirements Page 1 1 1 2 6 12 Figures Annexes A Coating adhesion and abrasive wear resistance B Measuring effective track width 20 24 III INTERNATIONAL STANDARD IS0 3562-1976 (E) Information processing - Inter

9、changeable magnetic single disk cartridge (top loaded) - Physical and magnetic characteristics 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies the general, physical, and magnetic characteristics for the interchange of magnetic single disk cartridges (top loaded) in order to fa

10、cilitate the interchange of data between electronic data processing systems. It does not apply to a specific design. It defines only the parameters relevant for interchange. 2 GENERAL DESCRIPTION 2.1 General figures A typical single disk cartridge is shown in figures 1 to 3. 2.2 Main elements The ma

11、in elements of this single disk cartridge are : - the top cover - the seal inserted in the rim of the top cover - the recording disk - the disk hub - the armature plate - the protective cover - the removable cover 2.3 Other elements Only the main elements are shown in the drawings. Usual disk cartri

12、dges may generally comprise also a handle, a mechanism for disconnecting the removable cover from the position of figure 2 so that it can be placed in the position of figure 3, and means for removing the disk cartridge from the drive. These other elements are not represented as they are not part of

13、this International Standard. 2.4 Non-working and working positions Figure 2 shows the cartridge in the unmounted condition, in which the removable cover is maintained in contact with the seal in the top cover so as to prevent ingress of dirt and contamination. A means must be provided to safely rest

14、rain the disk within the cartridge during operator handling, shipping, etc. Figure 3 shows the cartridge in the mounted position, with the removable cover on top of the cartridge. In this position the rim of the removable cover lies on the upper surface of the rim of the top cover. Not represented i

15、s the mechanism of the disk drive which exerts a downward retaining force on the pressure area of the removable cover. 2.5 Direction of rotation The recording disk shall rotate counter-clockwise when viewed from the top. 3 GENERAL REQUIREMENTS 3.1 Operating, storage and test environments 3.1 .I Oper

16、ating environment The operating temperature measured within the cartridge shall lie within the range 15 to 50 “C (60 to 120 OF) at a relative humidity of 8 to 80 %. The wet bulb reading shall not exceed 26 “C (78 “F). Before a cartridge is placed into operation, it shall be conditioned within its co

17、vers for a minimum of 2 h in the same environment as that in which the disk drive is operating. The above specified range does not necessarily apply to the disk drive. 3.1.2 Storage environment 3.1.2.1 UNRECOROED DISKS The storage temperature shall lie within the range - 40 “C to + 65 C (- 40 “F to

18、+ 150 “F), the wet bulb reading not exceeding 30 C (85 “F). For wet bulb temperatures between 0,5 “C (33 OF) and 30 “C (85 OF) the disk cartridge shall be able to withstand a relative humidity of 8 to 80 %. 3.1.2.2 RECORDED DISKS The storage temperature shall lie within the range - 40 “C to + 65 “C

19、(- 40 “F to + 150 “F), the wet bulb reading not exceeding 30 “C (85 “F). For wet bulb temperatures between 0,5 “C (33 OF) and 30C (85 OF) the disk cartridge shall be able to withstand a relative humidity of 8 to 80 %. The stray magnetic field intensity shall not exceed 4 000 A/m. 1 IS0 3562-1976 (E)

20、 3.1.3 Test environment Unless otherwise stated, measurements shall be carried out at 23 + 3 “C (73 * 5 OF), 40 to 60 % relative humidity after 24 h of acclimatization. Tests shall be carried out with the disk cartridge in the upright position, unless otherwise stated. 3.2 Resistance to shock and vi

21、bration The disk cartridge shall withstand the exposure to shock and/or vibration expected during normal operator usage and still meet all dimensional and functional specifications of this International Standard. Protection against shock and vibration during transportation and storage shall be subje

22、ct to agreement between supplier and user. 3.3 Materials Unless otherwise stated, the disk cartridge may be constructed from any suitable material so long as the dimensional, inertial and other functional requirements of this international Standard are maintained. The coefficient of thermal expansio

23、n of the disk material should preferably be : Al 12 -11 -=- 1 x At I (t2 - t, ) = (24 + 2) x 10-6/“C (13.3 +- I) x 10-6/oF where II is the length at tl = 15 “C (60 OF); I2 at t2 = 50 “C (120 OF); I = (12 + I, )/2. 4 PHYSICAL REQUIREMENTS 4.1 Dimensions 4.1.1 Overall external dimensions (see figure 4

24、) 4.1.1.1 EXTERNAL DIAMETER The external diameter is equal to the outside diameter d, of the rim of the top cover (see 4.1.2.2). 4.1.1.2 EXTERNAL HEIGHT The external height is hl 58 and y2 G 18 31. 4.1.2.6.2 Edges The distance of the upper edge of the brush window from the rim of the top cover is h,

25、 100 kR I A I- J - . FIGURE 16 - Read circuit 19 IS0 3562-1976 (E) ANNEX A (Not part of the standard) COATING ADHESION AND ABRASIVE WEAR RESISTANCE ) A.1 COATING ADHESION A.l.l Criterion The adhesion of the coating to the substrate should be maintained following bending around the 25,4 f 3,2 mm (1.0

26、 + 0.125 in) diameter of the conical mandrel specified in ASTM D 522-60. The criterion for failure is coating removal exceeding 10 % of the area after peeling of the prescribed pressure-sensitive tape. A.l.2 Equipment and materials a) Conical mandrel tester (ASTM D 522-60). b) Number 1 brown kraft w

27、rapping paper, substance 30, lubricated with talc (see ASTM D 522-60). c) Pressure-sensitive tape (3M Company No. 202 masking tape or equivalent). A.l.3 Test sample The test sample shall be as shown in figure 17;a = 119.4 + 5,l mm (4.7 + 0.2 in). A.l.4 Procedure a) Clean the sample with isopropyl al

28、cohol. b) Mount the sample in the conical mandrel tester as shown in figure 17;6 = 25 + 2,5 mm (1 ? 0.1 in). c) Bend as described in ASTM D 522-60 (the lubricated kraft paper is used in this step). d) Maintain the sample in the bent condition. Clamping the operating lever to the base plate is desira

29、ble. e) Wipe the upper surface with a soft paper. tissue. (Loose talc which would reduce the effectiveness of the pressure-sensitive tape should be removed by this wiping.) f) Apply a 6,35 mm (0.25 in) wide strip of pressure-sensitive tape to the upper surface as shown in figure 17. g) Peel the tape

30、 at an angle of 90” and a rate of approximately 25 mm/s (1 in/s). The peel force should be 3.0 + 0,5 N (300 f 50 gf) on unbent samples if the tape was properly applied. h) Examine for coating removal. A.2 ABRASIVE WEAR RESISTANCE A.2.1 Criterion Coating wear in the modified Taber Abraser2) test shal

31、l be less than 0,000 6 mm2 (lo- in2) of cross-sectional area in a test performed with the equivalent of a 6 Ctrn silicon carbide abrasive. 1) See 4.8.3.2 and 4.8.3.3. 2) Trademark of the Taber Instrument Corporation, 111 Goundry Street, North Tonawanda, New York, 20 IS0 3562-1976(E) A.2.2 Equipment

32、and materials a) Taber Abraserl) wear tester, model 503 or equivalent. Abrasive mounting wheel positioned to provide a 66,55 mm (2.62 in) diameter wear scar (see figure 18). b) Thin double-backed tape (Scotch2) double-stick tape, 3M Company catalog No. 136 or equivalent). c) Silicon carbide-coated a

33、brasives of approximately 3 and 8pm particle size (Charles Pfizer Company silicon carbide Ultralapa) abrasive on 0,073 mm (0.003 in) polyester backing or equivalent). d) Acrylic plastic sheet of 1,27 mm (0.05 in) thickness (Rohm and Haas Company grade G Plexiglas4) or equivalent). e) Profilometer ha

34、ving a 0,002 5 mm (0.000 1 in) radius stylus. A.2.3 Test sample The test sample shall be as shown in figure 18. A.2.4 Procedure a) Fasten a strip of new abrasive to the periphery of the mounting wheel with double-backed tape. The strip should be 3,2 to 4,8 mm (l/8 to 3/16 in) wide and firmly attache

35、d with a minimum amount of tension. The ends must not overlap but should have less than 0,8 mm (l/32 in) spacing. b) Place the wheel and sample on the Taber Abraser. It should be noted that the Taber Abraser vacuum attachment is not required in this test. c) Abrade samples with the nominal 3 and 8 p

36、m silicon carbide abrasives. The test should be performed using a 440 g total load (wheel plus arm) and 50 revolutions of the sample. d) Record the profile of the wear scar at the eight locations shown in figure 18. The cross-sectional area of the profilometer trace of the wear scar may be determine

37、d after drawing a straight line representing the unworn surface. The nominal 3 and 8 pm abrasives will be calibrated by means of tests employing acrylic plastic samples. The measured wear values will be used to determine the equivalent standard particle size by referring to the calibration curve. In

38、 subsequent tests of actual coatings the wear values are then plotted versus the standard particle size. The wear value for a 6pm abrasive is obtained by drawing a straight line between wear values obtained with abrasives both coarser and finer than 6 pm. 1 I Trademark of the Taber Instrument Corpor

39、ation, 111 Goundry Street, Tonawanda, New York 2) Trademark of 3M Company, 3M Center, St. Paul, Minn. 3) Trademark of Charles Pfizer and Company, Inc., 325 East 42nd Street, New York, N.Y. 4) Trademark of Rohm and Haas Company, Independence Hall, West Philadelphia, Pennsylvania. 21 IS0 3562-1976 (El

40、 - Disk outer diameter Conical mandrel a) Sample configuration and mounting location I Pressurejensitive tape Bent test sample . - - - I - - C-r & ,-c-c- b) Fasteniw and removal of presuresensitive tape FIGURE 17 -Adhesion test 22 IS0 3562-1976 (E) Material : brass Mass : 1902 5g Lines may be scribe

41、d as a guide for applying Dimensions in millimatres (Inch dimensions in parenthesesj I abrasive strip R 25.4 * 0.13 al Abrasive mounting wheel Disk outer diameter Disk inner diameter b) Wear test sample F I G U R E 18 - Abrasive wear resistance test 23 ISO3562-1976 (E) ANNEX B (Not part of the stand

42、ard) MEASURING EFFECTIVE TRACK WIDTH DC erase a seven-track wide band with track location 199 in the centre of the band and record a 2f frequency pattern in track location 199 using a data test head. Straddle erase shall be used. The read-back signal amplitude in this position is called 100 %. Then

43、move the head radially over the disk in increments not greater than 0,Ol mm (0.000 4 in) to the left or to the right of track 199 until the read-back signal becomes zero. Determine read-back signal amplitude at each incremental move and plot amplitude (y-axis) versus displacement (x-axis). See figure 19 for reading track width. The fringing at both ends of the curve shall be ignored when the track width is determined. Displacement, 0,Ol mm (0.000 4 in) increments FIGURE 19 - Track width diagram 24