SMPTE ST 197-2003 Motion-Picture Film (8-mm Type S) - 50-ft Model 1 Sound Camera Cartridge - Cartridge Cartridge-Camera Interface and Take-Up Core.pdf

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1、 1 Scope This standard specifies the dimensions of the 8-mm type S 50-ft model 1 sound motion-picture film camera cartridge and cartridge-camera interface. Also specified are the dimensions of the take-up core drive opening and critical dimensions of the take-up core as well as the driving force, di

2、rection of drive, and recommended drive ratio. An optional means of retaining the film supply scroll configuration until the cartridge is placed in the camera is also described. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisi

3、ons of this standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. SMPTE 166-1999

4、, Motion-Picture Film (8-mm Type S) Exposure Control and Stock Identification Sound and Silent Camera Cartridge Notches 3 Dimensions 3.1 The dimensions shall be as given in the figures and table. 3.2 The dimensions apply to an assembled cartridge with a film load at the time of manufacture. 3.3 Datu

5、m planes B, C, and A are referred to as first, second, and third, respectively. These planes, which are used for dimensioning, are mutually perpendicular and are jointly called a datum reference frame. 3.3.1 Datum plane A is coincident with the center of a circle located by basic dimension T. The ci

6、rcle is in contact with edges of the locating slot defined by dimensions A, O, P, and Q. The diameter of this circle is such that it applies regardless of feature size (RFS) of the locating slot (see annex A.3). The users attention is called to the possibility that compliance with this standard may

7、require use of an invention covered by patent rights. By publication of this standard, no position is taken with respect to the validity of this claim or of any patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to grant a license under these righ

8、ts on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be obtained from the publisher. No representation or warranty is made or implied that this is the only license that may be required to avoid infringement in the use of this standa

9、rd. Page 1 of 5 pages SMPTE 197-2003 Revision of ANSI/SMPTE 197-1998 Copyright 2003 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved November 12, 2003 SMPTE STANDARD for Motion-Picture Film (8-mm Type S) 50-Ft Model 1 Sou

10、nd Camera Cartridge Cartridge, Cartridge-Camera Interface and Take-Up Core SMPTE 197-2003 Page 2 of 5 pages Figure 2 Camera-locating slot Figure1 Cartridge SMPTE 197-2003 Page 3 of 5 pages Table 1 Dimensions SMPTE 197-2003 Page 4 of 5 pages 3.4 Datum features B, C, and A are primary, secondary, and

11、tertiary, respectively. 3.4.1 Datum feature B is the unnotched, unlabeled surface of the cartridge. It is the primary datum feature and relates the cartridge to the datum reference frame by having a minimum of three points contact the first datum plane, B. 3.4.2 Datum feature C is the front seating

12、surface of the cartridge. It is the secondary datum feature and relates the cartridge to the datum reference frame by having a minimum of two points contact the second datum plane, C. 3.5 Dimensions L, N, U, Am, V, M, W, and R3, measured from datum planes A and C to the depth of dimension E, as show

13、n in the view of the label side, describe the extent of both triangular recessed areas. The inboard wall of the recessed area, defined by dimensions L and N, shall be a smooth surface and may be tilted sufficiently from the perpendicular to datum plane B to allow proper release from a mold, when the

14、 cartridge is manufactured in a molding process. 3.6 The thickness of the wall of the cartridge used for notching, dimension W, shall be sufficient to withstand a force of at least 2.2 lbf (10 N), while deflecting no more than 0.04 in (1.0 mm). (For purposes of measurement, the force is applied by a

15、 solid round pin of nominal 0.05-in (1.3-mm) diameter centered 0.03 in (0.8 mm) nominally above or below the film speed or filter notch coincident with basic dimension T on datum feature C.) 3.7 Dimension A specifies the normal overall thickness of the cartridge. 3.8 Some cartridge manufacturers may

16、 desire to provide a means of retaining the film supply scroll configuration until the cartridge is placed in the camera. One method employs a film locking slide which is activated by the camera locating pin. The film is released when the cartridge is inserted in the camera. Dimension X specifies th

17、e minimum depth of the camera locating slot as the cartridge is received from the manufacturer, that is, the distance from datum plane C to the end of the slide. Dimension X is the minimum distance from datum plane C to the end of the slide after the cartridge is positioned in the camera. A camera l

18、ocating pin having a maximum diameter of 0.140 in (3.56 mm) and a length of 0.155 in 0.003 in (3.94 mm 0.08 mm) from datum plane C shall be sufficient to activate the film locking slide (see annex A.5). Allowance must be provided within the camera to accommodate a bowing of the notched, labeled side

19、 of the cartridge cover of up to a maximum of 1.009 in (25.63 mm) from datum plane B. The labeled side of the cartridge is shown in figure 1. 3.9 Dimensions B and M are measured from datum plane C. Dimensions C, J, H, and S are measured from datum plane A. 3.10 The take-up core axis shall be located

20、 within 0.010 in (0.25 mm) of the true center formed by datum plane A and basic dimension Af. 3.11 Dimensions Aa, Ab, Ac, and Ad are diameters. 3.12 Dimensions Bt, Bu, and Bv define an optional guide provided to facilitate film loading at the time of cartridge manufacture. 3.13 Placement of the film

21、 data, such as name, number, and length of load, and the inclusion of any notches, shall be in accordance with SMPTE 166. 4 Take-up core drive 4.1 The direction of rotation for the take-up core shall be clockwise when viewed from the core side of the cartridge (see annex A.5). SMPTE 197-2003 Page 5

22、of 5 pages 4.2 After disengagement of any core anti-backup device, the cartridge shall operate with a nominal torque of 0.85 ounce-force inch with a permissible range of 0.5 ozf.in to 1.5 ozf.in (6.0 x 10-3newton meters with a permissible range of 3.5 x 10-3N.m to 10.6 x 10-3N.m) as applied to the c

23、artridge (see annex A.2). 4.3 To avoid interference with core or film, the force applied to the supply side of the cartridge by a gasket surrounding the identification window shall not exceed 1 lbf (4.5 N) to the identification window area. NOTE Although two driving lugs are shown in the core and ar

24、e recommended, only one is essential for satisfactory operation. Annex A (informative) Additional data A.1 In designing the camera driver, consideration should be given to the fact that tooth-on-tooth engagement of the core lug on the camera driver pin is a possibility. A.2 It is recommended that th

25、e core be tendency driven (by some form of slip-drive mechanism) with a drive ratio of at least one turn of the core for every fifteen strokes of the pull-down claw. A.3 To provide a consistent method of measurement, it is recommended that a cartridge gauging fixture be used which incorporates datum

26、 surfaces, a locating pin, and means of exerting locating forces on appropriate surfaces of the cartridge. Drawings for a suitable cartridge-holding fixture may be obtained from the Society of Motion Picture and Television Engineers, 595 West Hartsdale Avenue, White Plains, NY 10607. A.4 The camera

27、locating pin should be capable of withstanding a force sufficient to activate the film locking slide. A.5 If an anti-backup mechanism is employed, such as described in 3.8, the mechanism should be capable of disengagement when the cartridge is placed in the camera, permitting the core to turn silent

28、ly. Annex B (informative) Bibliography SMPTE 198-2003, Motion-Picture Film (8-mm Type S) 50-Ft Model 1 Sound Camera Cartridge Aperture, Pressure Pad and Film Position SMPTE 199-2003, Motion-Picture Film (8-mm Type S) 50-Ft Model 1 Sound Camera Cartridge Pressure Pad Flatness and Camera Aperture Profile SMPTE 200M-2003, Motion-Picture Equipment (8-mm Type S) Model 1 Camera Cartridge Camera Run Length, Perforation Cutout and End-of-Run Notch