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4-5: LENS AND GATE MODULE
A. Film Gate Assembly
APERTUg€
FL,ATE
or dirt. The aperture plate {26) is mcunted to the
gate plate by two nuts, allowing it to slidc up and
Fic- #EB down with the framing lever. The outer guide rail
-
{38} is fixed to the gatc plate by twc serews. The
inner guide rail {34} is movable and is mounted by
twn shculd€r scrcws and is adjusted by the side
pressure spring {36).
1. Adiustment Of The lnner_Guide Rail:
The tensian af the inner guide rail is determined
by thc side pressure spring {35} about 60 - 70
grams- Excessive tension wifl cause early film
wcar, while insufficient te nsion causes an
unsteady picture. The tension can be increased
ar decreased by slightly bending the spring. A
weak or incorrectly formed spring should be
replaced.
2. Adiusting Thc Outcr Guidl n_qt1Po14io1:
Unless the gate plate has been removed or the
outcr raiI has been replaced, no adjustment
should be required.Ta adiust, thread a SMPTE
registration test film and align the cent€r of the
framc with the center of the apertur€ by ad-
justing the position of the outer rail- lt may also
be necessary to rc-position the claw {See See.
4-r-D)
B. Fifm Shoe And Lens Holder Assembly
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Fis- #sg
IH]{ER€UIDE
FAlL
Fh. #60
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1. Fjfm Shqs {Fig- #60}
The film shoe assenrbly {?) consists of the filrn
droe {5), the threading release plate {6} and the
shoe lock {3). The film shoe assembly is easily
removable with the shoe lock for clcaning or
replacement. lt is important that the shoe be
kept clean and free to seat squarely against the
aperture plate. The threading rcleasc platc
engages with the self-threading mechanism to
release the filrn shoe during threading.
OUTER GUID€
AAIL
!8IT'E PRESI',RE
;€PftIHE
FRAilING
L F Y E S
6ATEPLATE
The film gate assembly consists of the aperture
plate (26), framing lever (30), inncr (34) and outer
{38} guide rails and the film gate plate {27). The
film gate assembly maintains close contact with the
film and must be kcpt free from accurnulated dust
_ 4 3 _
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