Modern casino one armed bandits are controlled by computer software, and the winning %s are pre-programmed into the software.
Casino slot machines have Random Number Generators that are eternally generating combos, even when the slot machine is not being played.
Running simultaneously with the random # generator of the casino slot machine is the pay out percent.
The payout percent controls how much the slot machine game will pay, for eg the payout per cent might be ninety percent, meaning the one arm bandit will pay 90% of all the stakes played, and the casino simply gets to keep 10%.
This really does not mean that each time you bet ten credits you will receive nine in return – where is the fun and excitement in that? Instead, the casino slot machine just will not payout for a little while, and then suddenly jump on a hot streak and you might catch the big jackpot prize.
The payout percentages usually will vary between the differing games and several of the most acclaimed casinos, for e.g Golden Online Casino, which puts forth a payment of up to ninety-five per cent!
Therefore, in essence, the slot machine game takes all the $$$$$ played into it and pays it out to some privileged winners. The casino only gets to keep a averagely indistinct percent of all the bets placed.
The casino slot machine software controls every single part of the machine, from the blinking lights to the turning of the reels.
When you hit spin on the slot machine, a combination is formed by the RNG which relates to the pictures on the reel.