Modern casino one armed bandits are controlled by computer software, and the winning percentages are pre-programmed into the game software.
Casino Slots have Random Number Generators which are constantly generating combinations, even when the machine is not active.
Running side by side with the random # generator of the casino slot machine game is the pay out rate %.
The payout percent controls just how much the slot machine game will payout, for example the pay percent might be ninety percent, which means the slot game will pay out ninety per cent of all the bets played, … the casino will then get to keep 10%.
This does not mean that each time you bet 10 credits you will receive 9 in return – where’s the fun … thrill in that? Instead, the casino slot machine will not payout for a while, and then suddenly start up a hot streak and you might draw the big grand prize.
The payout percentages will very likely vary between the different games and several of the highly famous casinos, for e.g Golden Online Casino, which gives a cash payment of up to 95 percentage!
This means that, in essence, the slot machine game takes all the funds played into it and pays it out to some lucky winners. The casino only gets to keep a averagely minute % of all the bets put out.
The casino one armed bandit software controls every single part of the machine, from the flashing lights to the rolling of the reels.
When you hit spin on the slot machine, a combination is generated by the RNG which is linked to the pictures on the reel.