I
b) If multiple crediting persists, increase spring tension
by moving the ratchet torsion spring (short end) one
hole or 1/4 turn clockwise to the next hole. This
will slow the ratchet wheel and decrease the prob-
ability of multiple crediting.
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c) If the credit unit does not return to zero, check the
adjustment of the switch stack just above the step-up
solenoid. If the force exerted by the blades in this
stack is excessive, the credit unit will not return
to zero. Adjust the stack for a 1/32" gap when the
credit wheel is not on zero, and a .010" overtravel
at zero. Now spin the credit wheel by hand for the
maximum allowable number of credit. The normally
closed switch in the stack must now be opened by the
pin in the ratchet wheeL. This switch is the limit
swi tch and opens the lead to the step-up solenoid.
d) If two or more credits are subtracted each time the
credit button is actuated, the spring (SP-IOO-lIO)
that positions the escapement pawl is too strong.
Gently spread the turns on the spring until the
proper action is obtained.
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It is to be noted that selection of the #l, 2, 3, or 4
pin hole will limit the maximum number of credits
possible to 5, la, 15 or 25 as desired. This pin
actuates the limit switch on the switch stack~
5. Score Drum Unit Adjustment (See Figure III-4)
All score drum unit assemblies are essentially the same.
End of stroke switches are adjusted fora l/32" gap and
.010" overtravel (wipe) at the end of the solenoid stroke.
The switches in the stack are adjusted likewise. Note that
if the solenoid plunger is actuated by hand, all switches
are open in the zero pisition, i. e., the numeral i a i in
the viewing window on the insert. Malfunctions can be
corrected by proper adjustment. Typical malfunctions are:
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a) Score drum cohtinues to step through zero during the I'
reset cycle (top switch in switch assembly always closed).
b) Score drum does not score (second switch in switch
assembly always open).
c) Score drum and next higher drum advance simultaneously
on a continuous or intermi ttant basis. This is proper
when advancing from the 9th position to zero. For all
other numerical positions it indicates that the last
switch (closest to the metal frame) is always or
intermi ttantly closed.
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