TM 11-6720-242-35
pressure roller and the puck. Film is now advanced at a
ment by a solenoid and lever device.
Refer to
rate which is synchronous with the optical scan rate and
continues for that interval in which the prism rotates
operation.
through its 90-degree scan angle. Upon completion of
e. The puck, a rubber covered rotating disk, driven
the 90-degree scan, the lift cam returns the pressure
continuously by the scan motor, transports the film one
roller to its original position and film advance ceases.
frame in each scan cycle. The action of the pressure
The cam follower (36) rides on the lobe of the lift cam
roller against or away from the continuously rotating
for another 45 degrees while the film advance is
puck causes the film, which is sandwiched between the
stopped. An adjustment screw (55) on the pressure
two, to advance or stop (fig. 2-14).
roller assembly pushes against and causes one end of a
f. The puck switch (a pressure sensitive switch),
pivoted rocker arm (37) to move upward. The other end
which actuates the scan control relay K1, the frames
of the rocker arm moves downward and pushes the
remaining counter circuit, and the flashing of the
adas pressure plate (38) against the momentarily
OPERATE indicator is opened and closed by the timing
stopped film, at which time the coded information from
cam once in each camera cycle, in synchronism with the
the rha is exposed on the film.
rotation of the prism and transport of the film (para 2-
b. The takeup spool (51) and the takeup sprockets
3a).
(41) and supply sprockets (42) are driven from the scan
g. The lens and mirror assembly of the auxiliary
motor (1) through a gear and belt train (para 2-9b) in the
data annotation system (adas) is so mounted that it
magazine. When the magazine is installed on the body,
projects the coded data from the recording head
the train is coupled to the scan drive by the missing of
assembly (rha) through an opening in the focal plane
the magazine input gear (13) with the linkage gear (12)
plate and onto the film, where it is photographically
in the body.
recorded (fig. 2-13).
c. A clutch (48) on the takeup keyed shaft and a
h. The two electrical connectors, 1J1 and 1J2
brake (49) on the supply keyed shaft plus the takeup
accommodate the connectors of cables W3 and W4,
(56) and supply (57) keeper rollers insure a tight film
respectively. The adas is connected to the body through
wrap in the takeup spool. The driven sprockets (41 and
connector 1J2. Connector 1J1 accommodates cable
42) make film travel uniform by engaging the
W3 which terminates in connector 2J1 of the camera
perforations of the film.
control.
2-4. Functioning of Camera Control
2-3. Functioning of Magazine
a. The camera control (fig. 3-8) serves primarily
as the housing unit for the various electronic circuits
The
magazine
contains
separate
light-proof
which generate and control signal and power voltages
compartments for the film supply and takeup spools.
throughout the camera. A printed circuit interconnecting
Latched light-proof covers provide access to each
board (fig. 6-18) provides the mating connectors for the
compartment. Access to the mechanism that advances
plug-in aec board (fig. 6-15), control board (fig. 6-14),
the film is made by removing the magazine from the
and the scan drive board (fig. 6-16). A series of
body.
resistors, R1 through R7, mounted on the
a. Film from the supply spool (52) is advanced
interconnecting board provide for the appropriate
intermittently in frame lengths across the slit in the
exposure index (aei) of various types of films and are
camera's focal plate by the action of a cam operated
selected as follows:
pressure roller (3'5) which brings the film into contact
AEI of film
Connector J8 to
Connector J8
with a continuously rotating rubber covered puck (31)
20 ---------- pin 8 ---------- pin 13
located in the body. The film advance and the cam (lift
40 ---------- pin 8 ---------- pin 12
cam) (28) rotation are synchronous with the rotation of
60 ---------- pin 8 ---------- pin 11
the prism (22). The lobes of the lift cam are designed
80 ---------- pin 8 ---------- pin 10
so that the pressure roller is prevented from coming into
100--------- pin 8 ---------- pin M
engagement with the film until the first 45 degrees of
125--------- pin 8 ---------- pin K
prism rotation has been completed. At this time, the
200--------- pin 8 ---------- pin S
pressure roller is brought into position where it applies
pressure on the film, which is sandwiched between the
2-4
