Modern casino one armed bandits are controlled by computer chips and software, and the win %s are pre-programmed into the game software.
Casino slot machine games have RNGs that are endlessly generating combinations, even when the slot machine game is not being played.
Running concurrently with the Random Number Generator of the casino slot machine is the payout %.
The payout percent controls just how much the slot machine will pay out, for example the pay out per cent might be 90%, meaning the one arm bandit will pay 90% of all the bets played, … the casino will then get to keep 10 per cent.
This is not to say that for every time you bet 10 credits you will receive 9 in return – where is the fun and excitement in that? Instead, the casino one arm bandit will not payout for a while, and then suddenly fire up a hot streak and you might draw the big jackpot.
The pay off %s will definitely vary between the differing games and just a few of the extremely common casinos, for example Golden Online Casino, which puts forth a cash payment of up to 95 percentage!
Hence, in essence, the slot machine takes all the dough played into it and pays it out to a few fortunate winners. The casino only gets to keep a generally petite percent of all the bets made.
The casino slot machine software controls each and every part of the machine, from the blinking lights to the turning of the reels.
When you hit spin on the slot machine, a combination is generated by the RNG which associates with the pictures on the reel.