Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information

AUTO-LOAD SYSTEM ADJUSTMENTS
- GENERAL
The auto-load system consists of a series
of guides and rollers which when the system
is in the load position/ are so located as to
guide the film through the threading path.
When the system is in the open position/ the
guides and rollers clear the film path*.
When the system is in the open position/ the
location of the guiding parts is not critical.
Therefore/ adjustments to assure proper
location of the guiding parts are made with the
system in the load position.
The guides are connected by mechanical
linkage . The system is actuated by a cocking
lever at the lower end of the linkage and the
movement is stopped at the top end of the linkage.
The specified clearances must be checked
with the system in the load position. If the
need for adjustments is detected/ it is
important that repairman proceeds in the sequence
listed in this section. The sprocket timing and
the locating of the soundhead may be done without
disturbing the guide adjustments.
69
CHECKING AND ADJUSTING THE
LOADING GUIDES
Remove retaining ring that secures the
actuating assembly (5 Fig.J) and lock
the auto-loading system. Place a 0.015
inch feeler gauge between the film
support rails of the aperture plate and
the rear surface of the lower loop form
assembly (4 Fig.K). This surface should
touch the feeler gauge just as the h
of the loop form (5 Fig.K) strikes
shoulder on the mounting stud for the
entrance guide roller (6 Fig.K). To
adjust/ loosen two screws (7/ Fig.K)
which attach the upper sprocket guard
plate. Press downward on front end of
loop form assembly and rotate upper
sprocket guard plate until heel of loop
form strikes shoulder of stud and rear
surface clears aperture rails by 0.01*
inch. Then tighten screws (7, Fig.K)
securely.