Modern casino slot machines are controlled by computer software, and the winner percentages are preprogrammed into the computer software.
Casino slot machines have Random Number Generators that are endlessly generating combos, even when the slot machine game is not active.
Running synchronously with the RNG of the casino slot machine is the payout %.
The payout per cent controls just how much the slot machine game will payout, for example the pay % might be 90%, which means the one arm bandit will pay out ninety per cent of all the wagers played, and the casino only gets to keep 10%.
This does not mean that for every time you bet 10 credits you will receive nine in return – where is the fun … exhilaration in that? Instead, the casino one arm bandit will not pay out for a bit, and then suddenly hit a hot streak and you might draw the big jackpot.
The pay off percentages usually will vary between the different games and some of the notably established casinos, for instance Golden Online Casino, which provides a payment of up to 95 percent!
As a result, in essence, the slot machine game takes all the cash played into it and pays it out to some chosen winners. The casino only gets to keep a fairly tiny percentage of all the plays placed.
The casino slot software controls every part of the machine, from the dazzling lights to the turning of the reels.
When you hit spin on the one-armed bandit, a combination is set up by the RNG which relates to the pictures on the reel.