- How Slot Machines Work Inside
- How Do Slot Machine Tournaments Work
- Which Slot Machines Pay Out The Most
- How Casino Slot Machines Work
- How Do Slot Machine Lines Work
- How Do Slot Machines Work In Casinos
Introduction to How Slot Machines Work
Manage your bankroll. To built up a gaming strategy, the slot player must first of all decide on the. Read this article to have an understanding of what does a class 2 slot machine look like and how they work. Learn the basic strategy and tactics to play on class 2 gaming machines.
In these series of posts, I continue to answer the most common questions about slot machines asked via Google searches. This post explains the simple question of how slot machines work.
In this post, I will discuss the operational components of a slot machine from the point-of-view of a slots player. Meaning, the various interface areas on the front of a slot machine. These player interface areas include:
- Service Light
- Bonus Display (Optional)
- Pay Table
- Players Club
- Results
- Play Console
- Ticket In, Ticket Out (TITO)
Additional relatively minor interface areas are not listed or shown below. These areas are the locations audio speakers, audio volume control (optional), display lights, lever arm, and a hearing aid jack to accommodate those with a hearing disability.
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Service Light
A slot machine’s service light is generally located at the very top of a slot machine to be easily visible to casino employees. Because of this uppermost location, it’s also known as the candle within slots terminology.
Slots players can switch on the service light by activating the service button on the player console. Or, it will enable by itself if the player wins a hand pay jackpot or the slot machine develops a service fault. Faults might include lack of paper, a full cash-in condition, mechanical or electronic tampering, or an internal electronic failure such as CPU overheating, etc.
Modern casinos have a slot attendant call/dispatcher communication system using a headset and microphone. This setup is helpful for spotting problems on the casino floor. An activated service light automatically notifies the casino operating system. The casino dispatcher then informs the slot attendant responsible for that section of the casino.
Once the notification is sent out, a lit candle is of little practical use. At best, it guides the responding slot attendant the last few feet to the customer needing attention and, also, provides some reassurance to the waiting customer.
Slots players may activate the candle for a multitude of reasons. In general, they do so to deliberately call a slot attendant to their location, for any of a host of reasons only limited by imagination.
Pro-Tip #1: Service Light
Sometimes slots players need to leave a slot machine briefly but don’t want to give it up to someone else. If this break is relatively brief, say 10-15 minutes, use the service button to call over a slot attendant. The slot attendant can temporarily lock up the slot machine at the request of the player.
The slot machine can be unlocked later by the player via insertion of only their service card … or after 10-15 minutes when the temporary lockout automatically expires. For the specific length of lockout times, ask any slot attendant at your casino.
Bonus Display Area
If a specific slot machine has a bonus round available, then it will often have a second display area. Video slots may use the same primary display screen but abruptly display the bonus round game theme instead. However, video slots most often have a secondary display screen available for bonus rounds.
The Bonus Display area is optional and dependent upon the specific slot machine model. The location of this bonus display varies. More often than not, it is high up on the slot machine to be viewable by other players from a distance.
Wizard of oz free play. Casinos offset their losses by offering slot machines with bonus round display visible from a distance. Frankly, wins on these highly visible and usually loud bonus displays are seen by many. This obvious win encourages other casino patrons to play slot machines.
Pro-Tip #2: Bonus Round
Ruby slippers slot free. Bonus rounds generally cannot be activated unless that slot machine’s maximum credits are bet. By not betting maximum credits, the player automatically lowers their odds of winning. If betting maximum credits on a specific denomination slot machine is not affordable, pick another affordable slot machine. I discuss this approach in detail at Choosing Slot Machines.
Pay Table Area
The Pay Table area lists information on the jackpot amounts for specific reel combinations. It can also display some or all of the game theme rules. This area may be permanently displayed on the slot machine, or possibly only available through an interactive series of images available by touchscreen.
In either case, all possible wins may or may not be displayed. Sometimes the list is highly abbreviated, and displays only the highest jackpots, due to space limitations. Other times, mainly with touchscreen displays, a series of images can be switched between to view every possible winning combination.
However, pay tables typically provide the highest value jackpot. Slot machine game themes with multipliers or “wild” reel symbols have their most top value jackpots being the result of these reel symbols. Alternatively, it may not show all multipliers or “wild” symbols in the tabulated list of win-reel combinations. Instead, they may be in writing along the edge of the paytable interface area.
How Slot Machines Work Inside
But, with large touchscreens has come the capability to provide full paytable information along with game theme rules. Some slot machines now have this feature and, perhaps, more will have it in the future.
Many paytables show the number of credits that would be won for a specific combination of reel symbols. Or, they may show a monetary amount. In either case, these tables have separate columns for winning combinations dependent upon how many credits are bet. The far– right column typically shows the winning jackpots available when betting maximum credits.
How Do Slot Machine Tournaments Work
Some examples of credit and denomination combinations are:
- 1-credit slot machines having a $100 denomination
- 3-credit slot machines having a $5 denomination
- 5-credit “quarter slots” having a $0.25 denomination
- 300-credit “penny slots” have a $0.01 denomination
Pro-Tip #3: Pay Tables
Frankly, learning the paytable of any slot machines played is a relatively easy way to improve the odds of winning at slots. Many typical slots players believe there is no skill involved in winning at slot machines. Casinos gently foster this misunderstanding, as it is to their benefit. Don’t fall for it.
Traditionally, slots players find it acceptable to play slot machines with visual succinct paytables. Frankly, casinos would instead have their customers spend their time playing a game they don’t understand.
One easy-to-learn skill to improve the odds of winning at slots is choosing which slots to play based on their paytables. I discuss this in detail at Choosing Slot Machines.
Players Club Area
The Players Club area contains a card reader, numbered keypad, and a small display. A security feature of players club cards is for players to choose a PIN to enter when they wish to access their player account.
Newer-style slot machines have a touchscreen display, which removes the need for a physical keypad. Meaning, it’s part of the touchscreen display.
Which Slot Machines Pay Out The Most
Bets can be made on a slot machine without a players’ club card. At most casinos, it typically is not required. Neither is the PIN needed to play the device or view basic information. For example, a running total of reward points earned during the current play session is generally on display.
The PIN is required, however, to:
- access certain portions of player’s casino account
- transfer banked funds
- activate “free play” provided by the casino as a complimentary gift
Results Area
The Results interface area is where the reel combinations are seen after making a bet. Whether a video slot machine or a slot machine with physical reel, this is where the results of a bet are provided.
Interpreting whether a reel combination is a winner requires an understanding of the paytable. This result is fundamental to how slot machines work.
Of course, the slot machine will immediately display the results. A small display beneath the reels shows:
- the total amount of money or credits available in the machine
- how many credits most recently bet
- the jackpot amount won if any
Jackpots are usually in credits, where each credit equals the denomination of the machine rather than the amount bet, as well as a monetary amount.
Player Console
The Play Console typically has physical buttons, a cash/ticket reader, and a ticket printer. The buttons include:
- Cash Out for requesting the removal of any player funds in the machine
- Service to request a casino attendant
- A Series of Buttons for selecting the number of credits to bet, or placing the maximum possible bet
- Cash Out for removing any remaining bankroll
- Repeat to making another bet for the same credit(s)
- Denomination to select a specific bet denomination (optional)
The player console may have several possible button configurations, dependent upon the model of the slot machine. Given how often game themes are switched to maintain the interest of players over time, it is common for player consoles to be standardized over many machines within a casino.
Also, it is becoming common for consoles to have embedded displays visible through their semi-transparent button covers. This array of small screens are linked together to show visually stunning composite images displayed across the entire array of buttons.
Ticket In, Ticket Out (TITO)
By the beginning of the 21st Century, the use of coins was removed from casinos. This removal was for the sake of convenience of both the casino and customers. Both had issues with handling so many coins. Customers because of the difficulties inherent with carrying so much weight, but also gambling delays due to full (or empty) slot machine coin hoppers.
Casinos had issues with coins as well, including customer complaints due to delays caused by a full (or empty) slot machine coin hopper. This inconvenience was a coin logistics issue, which also included higher costs of maintaining a larger vault space and coin processing equipment and services. As casinos became more popular, coins became more difficult for everyone.
As a result, Ticket-In, Ticket-Out technology was pulled into casinos. They are now integral to how slot machines work. This automation is the same technology that was beginning to be seen in Automated Teller Machines (ATMs). Once proven out, this slot machine technology was here to stay like so many others.
Summary of How Slot Machines Work
I’ve discussed the operational components of a slot machine from the point-of-view of a slots player. This explanation of how slot machines work included the various player interface areas on the front of a typical slot machine.
There are additional relatively minor interface areas. These areas include audio speakers, audio volume control (optional), display lights, lever arm, and a hearing aid jack to accommodate those with a hearing disability.
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By Jon H. Friedl, Jr. Ph.D., President
Jon Friedl, LLC Play free keno game.
This is what is known about casino slot machines:
The RNG (Random Number Generator)
The Random Number Generator (RNG) is the brains of the slot machine. While most player know that there is a computer chip picking the numbers, they do not fully understand how it works and this can lead to some of the many myths and misconceptions about a slot machine. One of the most common myths is that a machine has a cycle that can let a player know when it is due to hit. – This is completely false and heres why. Inside the slot machine is a microprocessor similar to the one in your home computer. Instead of running Word or Excel, it runs a special program known as the RNG. This generates numbers to correspond to the symbols on the reel of the slot machine and decides the outcome of the game cycle. You might say that the RNG is in perpetual motion. As long as there is power to the machine it is constantly selecting random numbers every millisecond. The RNG generates a value between 0 and 4 billion (approx number) which is then translated into a specific set of numbers to correspond to the symbols on the reels. The outcome of each spin is determined by the number selected by the RNG. This number is chosen with the 1st hit of the spin button or 1st deposit of a coin. The RNG uses a formula known as an algorithm which is a series of instructions for generating the numbers. The scope of this is beyond most of our mathematical knowledge but can be checked and varified for accuracy. This is done by the Casino Control Board and other testing laboratories to make sure that the program performs as it should so the player will not be cheated. While all of this may sound reasonable it still does not give the normal person any basic understanding about how the RNG works. I would like to try to explain it in a simplified manner that I think most of us can relate to. Although this is not precisely how the RNG operates it should give you a basic understanding of the principles of how the winning spins are determined and how little affect the payout percentage chip installed in a slot machine actually has. Reel type slot machines have a number of spaces and stops on each reel that contain either a symbol or blank. These are refereed to as the physical stops. Most of the old mechanical machines had reels that could hold 20 symbols while the modern slots have reels with 22 physical stops. The micro processing technology allows the newer machines to be able to accommodate a large number of “Virtual stops”. I will try to simplify things by saying this: Imagine that there are only 10 stops on each reel. With 10 stops there can be 1,000 different combinations. We get this number by multiplying the number of symbols on each reel. (10 x 10 x 10 = 1,000) The 1,000 combinations that can be attained are known as a cycle and this is the word that sometimes confuses a player into thinking that the machine has cycles of winning and losing. The odds of a three number combination being picked are one in a thousand. Theoretically if you play 1,000 spins you should see each of these number combinations once. However we all know that this is not the case. If you played a million spins you would see that the numbers would even out to be closer to the actual probability. This is similar to flipping a coin 100 times. Although the odds are 50 -50 you are unlikely to see 50 heads and 50 tails after 100 flips. This is similiar to a Daily pick 3 lottery drawing. They have three glass bowls or drums each containing ten balls numbered 0 -9. The balls are mixed up and when the top is lifted a ball pops up the tube showing you the first number. This is repeated for the second and third number to give you a three digit winning combination. To use this as an example of the operation of the slot machine, we will replace the numbers 0 -9 on the balls with slot symbols. In each bowl, we will have one ball with the jackpot symbol on it. Two balls with a Bar, three balls with a cherry and four balls which are blank. Imagine the RNG in the slot machine as the person drawing the winning combination. Here is the breakdown of the number of times out of a thousand that the winning combination made.
- 3 Jackpot 1 (1x1x1)
- 3 Bars 8 (2x2x2)
- 3 Cherries 27 (3x3x3)
- Total Wins 37
- There are 963 losing combinations consists of:
- 3 blanks
- 2 blanks and a symbol.
- 1 blank and two different symbols.
- 3 mixed symbols.
How Casino Slot Machines Work
The RNG picks these combinations of numbers thousands of times each second. Now imagine a string of blinking lights where only one bulb can be lit at a time. The electrical current is zipping from bulb to bulb down the string. When you push a button the current stops moving and the bulb in that position lights up. In this example the light represents the three digit number just picked by the RNG. If you hesitated a second before pushing the button the results would be different. This is the same as you getting up from a machine and seeing someone else sit down and hit the jackpot. The chances are astronomical that you would have hit the spin button at the exact same millisecond.
All this comes down to this:
The percentage chip payout is based over the life of the machine. The expected service of any Commercial slot machine is at least 40 million game cycles. It might pay back 500% today and 10% tomorrow. It could also pay 180% for a month straight and then 2% for a year. The average will equal the percentage chip installed in the main board. This is why when you are at a casino you can dump $1000 or more in a slot machine, take a 5 minute walk to the restroom and when you return to the machine you were playing you see someone else sitting there with a smile from ear to ear because they just won a jackpot that should belong to you, after all the money thats in the machine was yours, wasn’t it?
Slot Terms and what they mean
- PAR = Paytable and Reelstrip listing though it is widely refered to as the pay out percentage.
- HFRQ = Hit Frequency.
- PSR = A program summary report
From what I have learned, there are two factors that are figured into a slot machine to eventually come up with the PAR. One of those is the hit frequency and the other is the win frequency. They are mutually exclusive, Example: – If you have a high hit frequency, you will have a low win frequency, and if you have a high win frequency, you will have a low hit frequency. Hit frequency is how often the machine actually pays something, and win frequnecy is how often a big jackpot is paid. All of this shapes how volatile the machine is. The way I understand it is you can’t change those factors and not mess with the PAR, and that is part of what GLI checks with the math.
If you know what you are looking for, you can actually observe it during machine play. Compare the play on a Double Red White and Blue with a Triple Red White and Blue. While the theme sounds the same, the volatility of the machines are worlds apart. You should see lots of small payouts on the double RWB and few jackpots,and the opposite on the Triple RWB.
Hit frequency depends on how many of the possible combinations result in a win. If there are 262,144 possible combinations (a three reel, 64 positions per reel game). We may have, say 61,700 possible winning combinations (taken from a real game). For the example given, on the average about 23% of the games will result in a win of some kind.
The hold of the game may be altered by either changing the number of winning combinations, or changing how much gets paid on a certain win. The first can be done without a change in the Pay Table. The second will reflect as a change in the pay Table.
All reel games I have ever seen have many possible combinations to give a different Hold. The intention is that a different denomination for a given game be set to a given Hold. A casino can choose to have 2.5% of a dollar, or 10% of a quarter, and so on, each giving the casino about the same revenue per coin played.
Hit frequency varies more according to different games than within a given game. A higher hit frequency makes a game more exciting The pay awards are usually lower, but coming more often. A lower hit frequency game usually has higher payouts, but is hit less often. Both games can have the same Hold.
Hit frequency depends on how many of the possible combinations result in a win. If there are 262,144 possible combinations (a three reel, 64 positions per reel game). We may have, say 61,700 possible winning combinations (taken from a real game)”
So I gather that “positions” mean symbols on the reel and Is that a typical amount of combinations? (64 ^3)
My Experience with hands on debugging of many micoporcessors and some limited programming. It seems to me with todays video processing power it could be a huge number of positions and combinations. ( I mean the reels don’t actually spin any more, its more just scrolling video data. The same goes for the RNG (Random Number Generator). To put it in layman terms, how many positions/possible combinations would a “money to burn”, “winning bid”, “jackpot party”, etc have?
Well, Generally there are aproximately 32 positions per reel. (Ok 5 reels = a really big number.
How Do Slot Machine Lines Work
High jackpot value = really low hit rate on the Jackpot, but lots of small wins.
Most of the hardware is pretty standard microprocessor circuits with only a few bells and whistles added. De-engineering is seldom difficult if you have done it before. Dis-assembling firmware is time consuming but an excellent learning experience. You really get a good understanding of how the game works.
Most Stepper (reel) games have only 22 reel stops including the blanks. However, virtual numbers are assigned to the reel stops. which means that the reels can be weighted. As an example assign more virtual numbers to the blank spaces on a slot machine reel. (usually blank spaces around the symbols for the top award) This of course intices players to stay at a machine for longer periods. Im not totally sure but with the memory limitations on IGT S+ machines highest number of virtual reel stops is 64^3 however on video reel machines appear to have as many as 88 reel stops (no virtual stops for video since they are virtual reels) now the strange thing is that they can have more reel stops for some reels than others. eg:
How Do Slot Machines Work In Casinos
A game with 5 reels can have 60 stops for the 5th reel 70 for the 4th 72 for the 2nd and 3rd and 88 for the 1st this would yeild 1,916,006,400 reel combos. thats a whole lot to work with. you could imagine the possibilities in tweaking either the PAR or HFRQ by fractions of a %. – All This is just my opinion, of course!