Driving motors
The
Eclair 16
is usually equipped with a
Multiduty motor
(code BEALA): See booklets 7006 and 7007
Power: 12 volt direct current
Speed: a) 24 and 25 frames/second
pilot frequency: 50, 60 or 100 cycles set by switches
b) variable speed from 4 to 40 frames/second servo controlled
with a regulation of 2
%,
Clapper:
three-position switch: automatic clapper, no clapper or
manual clapper.
On specification the following regulated motors can still be supplied:
Power supply: 12 volt direct current
25 f/s. 50 cycles with synchro generator and
automatic clapper (Bloop)
Code: BLOTU
25 f/s. 100 cycles with synchro generator and
automatic clapper
24 f/s. 50 cycles with synchro generator and
automatic clapper (Bloop)
24 f/s. 60 cycles with synchro generator and
automatic clapper (Bloop)
24 f/s. 100 cycles with synchro generator and
Code: CLAMO
Code: BLOBO
Code: BLOMU
automatic clapper
Code: CUPE
The above regulated motors include a pilot lamp (E 41) which goe:; off
as soon as the motor does not run at synchro speed.
Electrical connection of regulated motors
The four-pin "Cannon" socket on the motor connects the supply cable.
The start switch is next to the "Cannon" socket. A 50, 60 or 100 cycle
generator, depending on the type of motor, supplies the synchronisation
frequency to the BAKEL or CIBIN battery by means of cable CICAB.
SECTION VI
A four-core CICAB cable feeds the motor on 2 cores and transmits
through the other two cores the synchronization frequency to the
magnetic recorder.
Speed regulation
A built-in regulator controls the speed to a tolerance of
±
0.5
% :
there
is no need therefore for a tachometer. As soon as the control-light (E 41)
lights up, even weakly, the filming speed is guaranted. If the light does
not go on, synchronization is not guaranted. Since the lighting power
of the bulb depends on the amperage of the battery the brilliance in
dicates the state of charge of the battery.
Automatic clapper
Every time the camera starts, the light E 48 goes on for 0.3 secs. which
will fog 6 or 7 frames; the light then goes out and a pilot frequency is
sent to the magnetic recorder. When editing, the synchronization of the
film-image with the sound tape is obtained by aligning the last image
completely fogged with the beginning of the pilot frequency.
In the case of "BLOOP" motors, the blackening of the frames is similar,
but during that time the camera sends an Bvolt direct current supply to
the recorder oscillator (e.g. Nagra): this oscillator transmits a 1000 cycle
audible frequency which is superimposed on the modulation of the
magnetic tape. On the editing table synchronization
is
obtained by
making the last frame completely fogged coincide with the 1000 cycle
frequency.
C a u t i o n:
Due to the fact that a reversal of polarity would result in the destruction
of electronic components, the following points should be observed:
a) never use supply cables wiring and polarity of which is unknown: in
doubtful cases, check
·
that the connections have been properly made
as indicated:
9
Summary of Contents for 16
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