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Stacker Adjustments
Stacker Receiver Alignment
It is important that bills drop directly into the stacker receiver without rubbing the sides.
This means not only rubbing on the left or right side of the receiver, but also front to
back. The best test is to insert a bill into the bill acceptor and turn off the power as the bill
is fed into the stacker. This allows you to view the receiver positioning.
If the bill is rubbing on the left or right side of the receiver, you may adjust it as
follows:
First turn of the power and remove the cover over the stacker board.
Loosen the stand offs that hold the stacker board in place and move the board in the
direction to which the bill is rubbing.
Tighten the stand offs, turn the power back on and repeat the bill insertion test.
Repeat adjustment as necessary.
After the adjustments are made, replace the cover over the stacker board and test for
proper operation.
If the bill is rubbing to the front our back of the receiver, you may adjust it as
follows:
This usually indicates a stacker mount adjustment is required. See the bill alignment
section for this adjustment procedure.
Stacker Ram Encoder Adjustment
The ram on a stacker is the part that moves the bill from the receiver to the storage bin
(box 1, 2 or 3). The ram, in the idle position, rests completely back in the receiver
assembly in the “home” position. The stacker knows this position by the “ram encoder”
that breaks the light of an optic sensor. If this is not working correctly, the results are that
the ram will continue to cycle back and forth. In 30 to 40 seconds, the change machine
will go out of order with a “stacker” error.
To investigate this condition, remove the four outside screws on the cover that holds the
stacker control board. On a 2 or 3 box stacker this will reveal the optic sensor. The optic
sensor will have four wires, two on the top (red and black) and two on the bottom (green
and white). The ram encoder located on the back of the stacker ram has to be adjusted so
that the optic sensor will be “blocked” by the metal encoder when the ram is in the home
position.
