Modern casino one armed bandits are controlled by a computer, and the win %s are preprogrammed into the software.
Casino one armed bandits have Random Number Generators that are eternally generating combinations, even when the machine is not being played.
Running in unison with the random # generator of the casino slot machine is the payout %.
The payout per cent controls how much the slot machine game will pay, for e.g. the pay out percentage may be 90%, which means the slot machine game will payout 90% of all the bets played, … the casino will then get to keep 10 per cent.
This is not to say that every time you bet 10 credits you will receive 9 in return – where is the fun and excitement in that? Instead, the casino slot machine game just will not payout for a while, and then suddenly go on a hot streak and you might draw the big jackpot prize.
The profit %s shall vary between the various games and several of the highly common casinos, for example Golden Online Casino, which puts forth a pay out of up to 95 %!
Hence, in essence, the slot machine game takes all the dough played into it and pays it out to a couple of privileged winners. The casino only gets to keep a basically minute percent of all the stakes placed.
The casino slot machine software controls each and every part of the machine, from the flashing lights to the revolving of the reels.
When you hit spin on the one-armed bandit, a combination is formed by the RNG which connects with the pictures on the reel.