1、I SMPTE STANDARD ANSIBMPTE 206-1 998 Revision of ANSI/SMPTE 206-1993 for Motion-Picture Equipment (8-mm Type S) - Model 1 Sound Camera Cartridge - Aperture, Profile, Film Position, Pressure Pad and Flatness (2004 Capacity) 1 Scope This standard specifies the dimensions and location of the cartridge
2、aperture, pressure pad, and charac- teristics necessary for its appropriate flatness, clear- ance, and location of film in the camera aperture of 2004 (60-m) capacity 8-mm type S model 1 sound motion-picture film camera cartridges. 2 Dimensions 2.1 The dimensions shall be as given in the figures and
3、 tables. 2.2 The dimensions shown in figures 1 and 3 and tables 1 and 3 apply to a cartridge that is fully assembled but does not contain film. The dimen- sions shown in figure 2 and table 2 apply to an assembled cartridge with a film load at the time of manufacture. 2.3 The datum planes and datum f
4、eatures used for dimensioning are as defined in 2.3, 2.3.1, 2.4, 2.4.1, and 2.4.2 of ANSVSMPTE 205. 2.4 Dimensions T and U denote the lateral loca- tion of the film in the cartridge before insertion in the camera. After insertion, dimension T becomes 0.060 in (1.52 mm) minimum and dimension U become
5、s 0.050 in (1.27 mm) minimum. 2.5 All dimensions in table 1, except dimensions A and C, apply at the front surface of the pres- sure pad. A draft of 5“ to the recess area is permitted as well as an inside or outside radius of 0.005 in (0.13 mm) at all corners to provide satisfactory mold release whe
6、n the pressure pad is manufactured in a molding process Page 1 of 5 pages 2.6 Dimension A denotes the space available from datum plane C for penetration of the camera film alignment guide wings or the camera claw into the recessed area of the cartridge pressure pad. 2.7 Dimension B is measured from
7、datum plane C and determines the operating position of the cartridge pressure pad. 2.8 Dimensions relative to the surface of the pressure pad are measured from a plane estab- lished through surfaces 1, 2, and 3, as defined by 0.060-in (1.52-mm) diameter circles dimen- sionally centered (see figure 3
8、 and table 4). The actual camera aperture bosses may deviate from this shape. 2.9 Dimension G2 specifies the clearance for film in the camera aperture area, based on dimension T2, the thickness of the film in the center of the picture area (see note 1). 2.10 Dimension G2 specifies the extension of t
9、he camera aperture plate boss points (corre- sponding to 1, 2, and 3) beyond the aperture plate plane at the aperture opening. 2.11 The upper and lower pad areas extend from dimension C2 to the top and bottom of the cartridge pressure pad within dimension K2. 2.12 Dimension H2 is intended to apply f
10、rom a plane as described in 2.8. 2.13 The plus values given for the pressure pad film surface flatness tolerances are to be directed toward the lens (see note 2). CAUTION NOTICE: This Standard may be revised or withdrawn at any time. The procedures of the Standard Developer require that action be ta
11、ken lo reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of standards may receive current information on all standards by calling or writing the Standard Developer. Printed in USA. L American National Standard Copyright 8 1998 by THE SOCIET
12、Y OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdaie Ave., White Plains, NY 10607 (914) 761-1100 Approved August 18,1998 STD-SMPTE 20b-ENGL 2778 M 8357qOL 0003030 TBL m ANSVSMPTE 206-1 998 SECTION XI-X CARTRIDGE PRESSWE PADL a CARTRIDGE 111 POSITIOI TO RUI) FOR REFERENCE (iIILY I/ Figure 1
13、 Cartridge pressure pad Table 1 - Pressure pad specifications Dimensions Inches Millimeters A 0.150 max 3.81 max C 0.090 min 2.29 min D 0.540 min 13.72 min E 0.260 max 6.60 max F 0.360 f 0.020 9.14 f 0.51 G 0.455 min 11.56 min 9.27 rnax H 0.365 max J 0.300 max 7.62 rnax K 0.000 min 0.00 min M 0.300
14、 min 7.62 min N 0.140 max 3.56 max B 0.077 f 0.005 1.96 f 0.13 L 0.540 f 0.020 13.72 f 0.51 O 0.058 f 0.022 1.47 f 0.56 P 0.038 f 0.022 0.97 f 0.56 Q 0.055 min 1.40 min S 0.090 min 2.29 min Page 2 of 5 pages , STDaSMPTE 20b-ENGL 3978 8357403 0003033 938 ANSUSRAPTE 206-1998 25“ SECTION Y-Y 1-c -1 I I
15、 - 1 FRONT ELEVATION LOOKING FROM LENS Figure 2 - Cartridge aperture opening and film position Table 2 - Aperture and film position specifications Dimensions inches T 0.050 min U 0.040 min v 0.061 f 0.006 W 0.648 f 0.006 X 0.451 f 0.006 Y 0.451 f 0.004 2 0.111 f 0.003 Al 0.642 min BI 0.445 min Mill
16、imeters 1.27 min 1.02 min 1.55 f 0.15 16.46 f 0.15 11.46 f 0.15 11.46 f 0.10 2.82 f 0.08 16.31 min 11.30 min Page 3 of 5 pages CAMERA APERTURE PLATE G; GZ /- FIU SURFACE BOSS 3 PRESSURE PAD FILM SURFACE SECTION Y-Y TYPICAL CUERA APERTURE PLATE IN POSITION WITH CARTRIDGE PRESSURE PAD SECTION Z-Z TYPI
17、CAL CAMERA APPRTUAE PLATE CAYERA APERTURE OPENING WITH PRESSURE PAD IN POSITION IN POSITION WITH CARTRiGE PRESSURE PID Figure 3 - Pressure pad flatness reference surfaces Table 3 - Pressure pad flatness dimensions I Dimensions Inches Millimeters I A2 B2 c2 D2 E2 Fz G2 GI2 H2 J2 K2 0.378 k 0.030 o. 1
18、 53 0.393 f 0.590 f 0.005 T2 + 0.0007 T2 + 0.0012 0.0065 0.0070 0.004 0.055 0.310 0.001 9.60 I 0.03 0.002 + 0.05 0.000 - 0.00 nom 3.89 nom 0.001 9.98 f 0.03 0.001 14.99 f 0.03 min 0.13 min max T2 + 0.030 max min 2 + 0.018 min min max min min max 0.165 min 0.178 max 0.10 min 1.40 min 7.78 max Page 4
19、of 5 pages STD-SMPTE Zllb-ENGL 2978 D 8357403 0003033 790 ANSVSMPTE 206-1998 Table 4 - Flatness tolerances on pressure pad film surface Areas Inches Millimeters Aperture area Upper area (within dimension C) Lower area + 0.0058 - T2 + 0.0048 - T2 + 0.0078 - T2 + 0.0038 - T2 + 0.0078 - Ta + 0.0018 - T
20、2 + 0.147 - T2 + 0.122 - T2 + 0.198 - 12 + 0.097 - TP + 0.198 - T2 + 0.046 - TP NOTE - Dimensions are measured from the zero plane defined by surfaces 1, 2, and 3 (see 2.8, figure 3, and note 2). 2.14 Surface 4 of the cartridge pressure pad and boss 4 of the camera aperture are established to aid in
21、 seating the cartridge pressure pad to the camera aperture plate. They serve no function once the pressure pad is in operating position (see note 3). NOTES 1 It is considered good practice to relieve the camera aperture plate above and below the picture area to allow a clearance for film transport a
22、nd minimize the possibility of film pinching. Dimension F2 specifies the amount of recess for this purpose. Annex A (informative) Additional data A.l A force of 8 oz to 14 oz (2.2 N to 3.9 N) must be exerted on the pressure pad for proper seating against the camera aperture plate. A2 The two cutout
23、areas in the pressure pad permit the use of fingers for side-guiding. A force of 1.5 oz to 2.5 oz (0.42 N to 0.70 N) per finger is adequate to ensure picture steadiness. A.3 Other portions of the pressure pad front surface may be recessed in addition to the required recesses, defined by dimension C
24、in 2.5, for camera claw and camera aperture guide finger penetration. A.4 The cartridge pressure pad recess, defined by dimen- sions O, E, and J, is available for camera claw film transport Annex B (informative) Bibliography ANSIISMPTE 157-1 994, Motion-Picture Film (8-mm Type S) - Camera Aperture I
25、mage and Usage 2 It is intended that the film surface of the cartridge pressure pad be flat, or molded as a flat plane. Pits or depressions, however, which do not interfere with the film flatness are acceptable. Relief in the pad surface equal to the sound stripe thickness may be provided beneath th
26、ose areas of the film which are striped by adding material to the backing of the film. Tolerances for the flatness on the 8-mm type S cartridge pressure pad film surface are specified to account for slight warpage in molding if the pressure pad is made from a plastic material (see annex A.3). 3 Thre
27、e lugs, Nos. 1, 2, and 3, on the pressure pad are intended to touch the camera aperture plate and thereby determine the film plane alignment and the clearance allowed for the thickness of the film. Lug 4 should not touch the camera aperture plate. engagement. The perforation used for the film vertic
28、al reg- istration at its stopping position is specified in ANSVSMPTE 157, as minus 2 from the perforation adjacent to the image formed by the camera aperture. The horizontal centerline of the camera aperture should coincide nominally with datum plane A. A.5 To provide a consistent method of measurem
29、ent, it is recommended that a cartridge gauging fixture be used which incorporates datum surfaces, a locating pin, and means for exerting locating forces on appropriate surfaces of the cartridge. For pressure pad measurements, a second fixture, incorporating three 0.060-in (1.52-mm) diameter bosses and a means for exerting the appropriate pressure pad seating force, is recommended. ANSI/SMPTE 205-1993 (R1998), Motion-Picture Equipment (8-mm Type S) - Model 1 Camera Cartridge - Interface and Take-up Core Drive (200-Ft Capacity) Page 5 of 5 pages
