Repair and Adjustments
Issue: 08/2012
Friction body
Á Felt disk
 Friction disk
à Spring
Ä Knurled nut
Via the knurled nut the spring tension can be adjusted and therefore the pressure
against the friction disk to the felt disk. Adjusting the frictions is necessary if the felt disk
was replaced.
:
• Put a full lm spool onto the take-off friction shaft.
Thread the lm and run the projector.
• Stop the projector - the lm should not build a loop, otherwise the friction is adjusted
with too small pressure.
• Turn the knurled nut clockwise to increase the pressure onto the felt disk.
:
• The take-up lm spool has to be nearly full, then stop the projector - the lm should
not build a loop.
• If necessary adjust:
- Right turn of the knurled nut => spring increases the pressure
- Left turn of the knurled nut => spring decreases the pressure
X
Z Depending on the lm reel length the lm tension has to be adapted.
Z The lm tension is inversely proportional to the reel diameter:
The lm tension is less, when the reel diameter is large (beginning of take-off fric-
tion).
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