Modern casino slot machines are controlled by computer software, and the win %s are preprogrammed into the software.
Casino slot machines have Random Number Generators which are ceaselessly generating combinations, even when the slot machine game is not active.
Running side by side with the Random Number Generator of the casino slot machine is the payout rate %.
The payout % controls how much the one-armed bandit will pay, for example the payout % might be 90%, which means the one arm bandit will pay ninety per cent of all the stakes played, … the casino simply gets to keep ten per cent.
This doesn’t imply that for every time you bet 10 credits you will receive nine in return – where’s the fun … exhilaration in that? Instead, the casino slot just won’t pay out for a while, and then suddenly hit a hot streak and you might hit a big pot prize.
The payout %s will definitely vary between the differing games and a few of the most popular casinos, for e.g Golden Online Casino, which puts forth a cash payment of up to ninety five per cent!
As a result, in essence, the one-armed bandit takes all the $$$$$ played into it and pays it out to a handful of lucky winners. The casino only gets to keep a relatively small percent of all the bets placed.
The casino slot software controls every single part of the machine, from the flickering lights to the circulating of the reels.
When you hit spin on the slot machine game, a combination is generated by the RNG which corresponds to the pictures on the reel.