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Page Title:
Figure 2-7. Intervalometer pulse circuit, schematic diagram |
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  39
Pressure plate
20
assembly
1
Scan motor B1
40
Film keeper
21
gear
2
Scan motor gear
41
Takeup sprocket
22
Prism
3
Tach gear
42
Supply sprocket
23
Pulley
4
Tachometer
43
Pulley
24
Pulley
5
Scan motor gear pinion
44
Gear
25
Timing belt
6
Idler gear
45
Pulley
26
Gear
7
Idler gear pinion
46
Gear
27
Gear
8
Gear
47
Gear
28
Lift cam
9
Pulley
48
Clutch
29
Capping cam
10
Pulley
49
Brake
30
Puck gear
11
Belt
50
Belt
31
Puck
12
Linkage gear
51
Takeup spool
32
Timing cam
13
Input gear
52
Supply spool
33
Puck switch
14
Idler gear
53
Supply slack loop
34
Capping blade
15.
gear, front pinion
54
Takeup slack loop
35
follower
16.
gear, rear pinion
55
Adjustment screw
37
Rocker arm
17
Gear
56
Takeup keeper roller
38
Adas pressure plate
18
Solenoid
57
Supply keeper roller
19
IMC cam
Figure 2-6. Continued.
Figure 2-7. Intervalometer pulse circuit, schematic diagram
tion of the timing cam and each closure denotes one
to one cycle every four and one-half seconds. The
camera cycle. It is also coupled mechanically (via a
pulse from the Intervalometer circuit energizes the scan
gear and belt train) to the adas pressure plate (fig. 2-6)
control relay 2A3K1 (fig. 6-16); the relay contacts close
and the operation of the puck switch and the adas
and the FRAMES REMIAINING counter, OPERATE
pressure plate are thus synchronized (para 2-9). The
lamp, and data annotation pulse circuits all operate.
puck switch also functions in both modes of operation,
The next ground pulse from the puck switch deenergizes
pulse and autocycle.
relay 2A3K1 thus opening the relay contacts. All of the
(1) Pulse mode. In the pulse mode of operation the
above functions stop until the next pulse from the
Intervalometer 2A4AR2 determines the cycling rate,
Intervalometer causes the sequence to be repeated.
which is from one cycle per second
2-15
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