Modern casino slot machine games are controlled by a computer, and the win percentages are pre-programmed into the gaming software.
Casino one armed bandits have Random Number Generators which are endlessly generating combinations, even when the slot machine is not active.
Running side by side with the Random Number Generator of the casino slot machine game is the pay out per cent.
The pay out % controls how much the slot machine game will pay out, for e.g. the pay percent may be ninety per cent, meaning the slot game will pay out ninety percent of all the bets played, … the casino only gets to keep ten percent.
This does not imply that for every time you bet 10 credits you will receive 9 in return – where is the fun and thrill in that? Instead, the casino slot will not payout for a while, and then suddenly start up a hot streak and you might draw the big jackpot prize.
The pay off %s most likely will vary between the different games and a handful of the highly established casinos, e.g. Golden Online Casino, which offers a payment of up to ninety five per cent!
Therefore, in essence, the one-armed bandit takes all the money played into it and pays it out to a handful of chosen winners. The casino only gets to keep a considerably tiny % of all the bets placed.
The casino slot machine software controls every single part of the machine, from the flickering lights to the rolling of the reels.
When you hit spin on the slot machine game, a combination is put together by the RNG which associates with the pictures on the reel.