Modern casino slot machines are controlled by computer software, and the win %s are pre-programmed into the gaming software.
Casino Slots have Random Number Generators that are ceaselessly generating combinations, even when the machine is not being played.
Running in unison with the random # generator of the casino slot machine game is the payout rate per cent.
The pay out % controls how much the slot machine will payout, for e.g. the pay out percent may be 90%, which means the slot game will pay ninety percent of all the wagers played, … the casino only gets to keep 10 per cent.
This is not to say that for every time you bet 10 credits you will receive nine in return – where’s the fun … excitement in that? Instead, the casino one arm bandit just won’t payout for a while, and then suddenly go on a hot streak and you might hit a big pot prize.
The pay out percentages will very likely vary between the different games and some of the most famous casinos, for instance Golden Online Casino, which puts forth a payment of up to 95 per cent!
Hence, in essence, the one-armed bandit takes all the money played into it and pays it out to a handful of privileged winners. The casino only gets to keep a relatively tiny per cent of all the wagers placed.
The casino slot software controls any part of the machine, from the dazzling lights to the rolling of the reels.
When you hit spin on the slot machine game, a combination is produced by the RNG which relates to the pictures on the reel.