Modern casino slot games are controlled by a computer, and the win %s are preprogrammed into the computer software.
Casino slot games have Random # Generators which are endlessly generating combinations, even when the game is not being played.
Running concurrently with the RNG of the casino one-armed bandit is the pay out rate percent.
The pay out per cent controls how much the slot machine will pay out, for example the pay out % could be ninety per cent, which means the slot machine will payout ninety per cent of all the wagers played, and the casino will then get to keep ten per cent.
This doesn’t imply that for every time you bet ten credits you will receive 9 in return – where’s the fun … thrill in that? Instead, the casino slot just will not payout for a bit, and then suddenly jump on a hot streak and you might draw the big jackpot.
The payoff percentages most likely will vary between the different games and some of the very popular casinos, for e.g Golden Online Casino, which gives a payout rate of up to ninety-five percentage!
Hence, in essence, the slot machine takes all the currency played into it and pays it out to some chosen winners. The casino only gets to keep a generally tiny percentage of all the bets allocated.
The casino slot software controls every single part of the machine, from the blinking lights to the spinning of the reels.
When you hit spin on the slot machine game, a combination is generated by the RNG which relates to the pictures on the reel.