o
Check to be sure that the sensor tab
1
interrupts the opto. When the claw is pushed
up toward the top of the cabinet, a LED
2
on the opto sensor board
3
should light up.
If it does not, either the sensor tab
1
is out of adjustment or the opto sensor board
3
is
bad. To adjust the tab alignment, carefully bend the sensor bracket
4
into position.
Claw has little power and air pressure reads low and cannot be adjusted
•
There is likely an air leak. Put game into claw adjust mode (see ‘Setting Claw Strength’ in
the Adjustment and Settings section) so that the air pump is running constantly. Turn the
green adjustment valve clockwise until it closes to pump the maximum air pressure into the
system. Check all air line connections.
Claw will not move from front to back or from left to right.
•
There is seldom a problem with the stepper motors used to drive the mechanism. The
problem is almost certainly a mechanical bind or an electrical connection to the motor(s).
o
Check to see if there is a mechanical bind by moving the claw by hand with the game
powered off. The mechanism should move easily. If the mechanism is hard to move,
find the mechanical problem.
o
If there is no mechanical bind, check the continuity of wires and connections to the
corresponding motors.
Elevator lifts product too high
•
Check programmable adjustment
•
Check claw weight spring adjustment. The crane checks the product level by lowering the
claw to the playfield in attract mode. If the claw weight spring adjustment is not set properly
or if the claw weight opto sensor is not working, the crane thinks the product is too low and
will continue to raise the floor.
Elevator lifts the product properly, but keeps running when the floor is all the way up.
•
The Elevator upper limit sensor is not working.
o
Clean the opto transmitter and receiver lens (see ‘Clean the Floor Lift Optos’ in the
‘Maintenance’ section.
15
Summary of Contents for Acme Crane Company
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