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B. Adiustments:
The supply spindl€ should be lubricated with
petroleum oil {see lubricatisn chart}. The belt must
be clean and free from oil or dirt. Oily belt may
result in poor rewind. The knurled nut (221adjusts
the back tension ta the supply reel, too little back
tension will result in uneven or jerky film feed and
weak reverse take-up tension- Adiusting the knurled
nut effects both tfie rlverse take-up and the supply
tension. Correct adjustment will be a compromise.
5-3: REVERSE PROIECTION
A. Description
Fig. #71
ln reverse the motor rotates in a counter-clockwise
direction engaging the reyerse take-up clutch cam
{19} which in turn drives the clutch cover pulley
(18), driving the reverse belt. At thesame time the
main drive belt drives the reverse rubberroller (15
of Fig. *i72 & Fig.73l against the set collar behind
the flywheel, thereby driving the set collar or the
sound drum in the counter clockwise direction-
Fis. #??
i:Pt|lilG
Fig. #7!l
REYEBI'E
RUBAER
BOLLER
$guilDDEtril
SHAFY
SET COLLAF
Driving the flywheel is necessary to maintain the
fower loop when operating the prcjector fn reverse.
In normal forward projection the main drive belt
carries the reverse rubber roller and bracket
assembly {15} away from the set cal}ar where it
can rotate freely. The rubber roller must not be
in contact with the set collar in the forward mode-
(See Sec. 5-7-A)
B. Adjustments:
The reverse take-up clutch requires no lubrication
Except the bushing of the clutch cover pulley {18}.
(See lubrication chart). ltfhen re-assembling the
reverse take-up clutch mechanism, it is important
that the cluich cam {19} be positioned correctly.
A space of approxirnately 0-2mm is required
between the drive gear assembly {8} and the pulley
{18}- This is determined by the porition of the set
collar {20}.
1 1
12
l 4
10
r.---
I
Fis.#74
The reverse rubber roller requires no adjustments
ar long as th€ main drive belt is in contact
with the rotlerk drive gear. The spring lzal is
required to maintain enough pressure to assure the
gears contact with the main drive belt. lt may be
n€cessary to stretch this spring lo assure that the
roller has clear*d the set collar in the normal
forward position and that it drives the sound drum
during reverse. This action can be observed by
operating the mechanisrn manually via the inching
knob and with the flywheel removed. The rubber
roller should be clean and free from any grease or
oil. A dry or glazed roller should be replaced.
- 4 9 -
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