Slot Machine Peripheral Devices. Week # 6

Slot Machine Peripheral Devices Week # 6 Overview • Items to be covered: • Coin Comparators • Theory of Operation • Locations • Bill Validators • ...
Author: Michael Eaton
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Slot Machine Peripheral Devices Week # 6

Overview

• Items to be covered: • Coin Comparators • Theory of Operation • Locations

• Bill Validators • Theory of Operation • Description • Locations

• Hoppers • Overview • Theory of Operation

Coin Comparitors • Overview • An electronic device that tests coins and tokens. • Varying levels of sophistication • Early comparators could be defeated using a coin on a string • A string on a coin could be used to retrieve a coin after it activated a micro-switch which counted the coin • Current comparators counter not only a coin on a string but other more sophisticated attacks such as shaving the coin’s diameter Pictures:

Top: S+ Upright

Bottom: S+ Slant Top

Coin Comparitors • Overview • An electronic device that tests coins and tokens. • Varying levels of sophistication • Coin Shaving Attack • http://www.idxinc.com/shaving.htm

• Current usage • High Limit rooms • Second tier markets such as Downtown Las Vegas • Third tier markets such as South America

Coin Comparitors • Overview

US Coins

Coin Comparitors • Theory of Operation • Most comparitors in use a test coin as a basis of comparison • That limits the machine to accepting only one denomination • Largest Installed base • Still exists a large number of working spares due to the change to Ticket-In-Ticket-Out • See Learning Module Reference for theory of operation

• Some of the newer comparators use a range of sensors to measure the coins physical size and metal composition • http://www.idxinc.com/x20.htm • Can accept multiple types of coins

Coin Comparitors • Location of the Coin Comparitors • Varies per the type and manufacturer Bally’s Lucky Luigies

S-2000 and Vision

WMS’s Pegasus

• Overview

Bill Validators

• A Bill Accept (also called a Bill Validator): • Accepts paper currency and tickets • Issues credits to the host machine into which it is installed.

• The Bill Acceptor will only accept bills when enabled by the host machine. • This allows the host machine to only allow bills to be accepted at the appropriate times. I.E., when credits are less than the maximum allowed and during non-game play time.

• A Bill Acceptor performs the following function: • Detects that a bill is being inserted. • Transports the bill through the acceptors sensors.

Bill Validators • Overview • A Bill Acceptor performs the following function: • Recognizes the bill's denomination. • Holds the bill in escrow while it communicates to the host machine that is has a certain denomination bill. • Stores or rejects the bill.

• Paper Money Authenticity • Genuine U.S. paper currency contains a variety of printed indicia which may be used to identify the currency as authentic, • Also to distinguish between authentic currency of various denominations.

• Overview • US paper money

Bill Validators

Bill Validators • Theory • One indication of authenticity is the fact that certain areas on a U.S. bill are printed with magnetic ink • For example, the portrait which appears in the center of every U.S. bill is, in a genuine bill, printed entirely with magnetic ink. • The fanciful engraving which forms the printed border of each U.S. bill is likewise composed entirely of magnetic ink • As are the large capital letters or large numerals which appear to the right of the portrait and which identify the denomination of the bill (i.e., "ONE", "TWO", "FIVE", etc.).

• Other areas use non-magnetic ink • The green Treasury Department seal which underlies the denomination identifying letters or numerals to the right of the portrait, are printed in non-magnetic ink.

Bill Validators • Theory • Other areas use non-magnetic ink • The black Federal Reserve Bank seal which appears to the left of the portrait, are printed in non-magnetic ink.

• In addition the spacing of the lines that make up the image backgrounds of the portraits also can distinguish between some older bills • Each denomination of older U.S. bills is likewise characterized by the distance between the grid lines which comprise the background of the portrait field. • In one dollar bills, for example, the space between vertical grid lines is equal to 0.008 inches. • For two and five dollar bills, the grid line space is equal to 0.010 inches and 0.011 inches, respectively.

Bill Validators • Theory • Identification of bills based on average grid line spacing is likely to lead to failures to distinguish between bills having relatively small differences in grid spacing. • For example, certain commercial bill validators utilizing the average spacing technique cannot be used with both two dollar and five dollar bills, because the average grid line spacings are too similar. • Another problem with validators is that they may accept high denomination bills as valid lower denomination bills.

• A currency validator has a plurality of sensors positioned to encounter a bill • They generate electrical signals in response to certain features of the bill.

Bill Validators • Theory • Identification of bills based on average grid line spacing is likely to lead to failures to distinguish between bills having relatively small differences in grid spacing. • For example, certain commercial bill validators utilizing the average spacing technique cannot be used with both two dollar and five dollar bills, because the average grid line spacings are too similar. • Another problem with validators is that they may accept high denomination bills as valid lower denomination bills.

Bill Validators • Theory • A currency validator has a plurality of sensors positioned to encounter a bill • They generate electrical signals in response to certain features of the bill.

• The electrical signs are processed by a logic circuit, such as a microprocessor • To determine authenticity and denomination of the bill being tested.

• Theory

Bill Validators

• The electrical signs are processed by a logic circuit, such as a microprocessor • A histogram technique is employed to identify and distinguish certain features.

• Some of the other Sensors used • A transmissive sensor is provided to detect the physical presence or absence of the bill • A reflective sensor is provided to detect optical information on the surface of the bill

• Theory

Bill Validators

• The signals generated by the sensors are analyzed to determine • The presence or absence of each type of indicator on the bill. • The width of each detected magnetic region and non-magnetic space • Differences between these measured values and the known values for a genuine bill.

• Description • The currency validator • Has housing containing a bill passageway W/an entry and an exit A currency validator

Bill Validators • Description • The currency validator • Tractor belts and supporting rollers guide the bills through

Bill Validators JCN’s WBA Cash Box

• Description • The currency validator • The accepted bills are stored in the attached Cash Box

MEI’s Cash Box for the Cash Flow Bill Validator

Bill Validators • Description • Total Assembly JCN’s UBA

MEI’s Cash Flow

Bill Validators • Description • Total Assembly

JCN’s WBA

Coin Hoppers • Overview • Function • The hopper is a sub-assembly of the machine that receives coins, hold coins, and dispenses coins.

• Major Components • A rotary pin wheel for feeding coins to a pay out mechanism. • A wiper mounted adjacent the rotary pin which functions to wipe extra coins off the rotary pin wheel • A guide adjacent to the position at which the rotary pin wheel feeds coins to the pay out mechanism. • A 120 VAC (24 VDC) motor that runs when coins are to be paid • Adjustable coin-level sensor

Coin Hoppers • Overview

• Rotary Pin Wheel Wiper

• Mounted adjacent the rotary pin wheel

• Slightly removed from the position at which the rotary pin wheel feeds coins to the pay out mechanism. • The wiper functions to wipe extra coins off the rotary pin wheel and return them to the hopper basket • So that each location on the rotary pin wheel is occupied by only a single coin.

Coin Hoppers • Overview

• Payout Guide

• Adjacent to the position at which the rotary pin wheel feeds coins to the pay out mechanism.

• The guide aligns the coins being fed into the pay out mechanism to ensure that the coins enter the pay out mechanism Asahi Seiko • In a flat upright, on edge orientation. DH-750.

• Variations

• Escalator Hoppers

• The escalator hopper is used when coin the coin tray is on a plane higher than the hopper i.e., coins must travel upward from hopper to coin tray.

Coin Hoppers • Variations