OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

296
HOisting acceleration c am, -Mark tl3, from the
high point of the earnprofile.
Mark #4, from a point on the cam profile 9/64
inch beyond mark #3.
Hoisting deceleration cam. - Mark tl5,from the
high -point of the earnprofile.
Lower ing acce l e r a t ion c am . Mark #6, from the
high point of the earnprofile that is nearest
the end of the cam. (This point of thecam
is the upper unloading position, slow stop
point. )
On the outer rim of the hoist drum, at approximately equal intervals,
provide 12 chalk marks. These rnarks are for purpose
of stop watch timing of the slow hoisting speed required in
the adjustment routine prescribed below. Each chalked space
is closely equivalent to six inches of the hoist cable.
With the preceding preparations completed the adjustments are
made according to the following routine.
(1) start the motor and set controls for servo
electrical operation~
(2) Operate the controls to hoist the car at slow
speed. stop at a point 10 or 12 feet up the
trunk.
(3) Using a stop watch and observing the drum chalk
marks, operate to lower at a speed of six inches
per second. Permit the car to run until
switch #7 functions to stop the hoist.
(4) stop the motor~
(5) Reassemble the cam support unit. Mesh the carn
drive gearing so that the lowering deceleration
carnis located with scribe mark #1 adjacent
to the lowering cam arm roller (274328-1).
(6) Verify that the hoist control lever is at the
neutral detent.
NOTE: A further check for ascertaining that
the control linkage and A-end yoke is
at neutral is readily made by verifying
the 1.25-inch dimension shown on section
K-K, drawing number 274249.