Modern casino one armed bandits are controlled by computer software, and the win %s are pre-programmed into the gaming software.
Casino slot machine games have RNGs which are continually generating combinations, even when the machine is not being played.
Running concurrently with the Random Number Generator of the casino one-armed bandit is the payout rate per cent.
The pay out % controls how much the slot machine game will payout, for eg the payout percent might be 90%, which means the slot machine game will pay out ninety percent of all the stakes played, … the casino gets to keep 10 per cent.
This is not to say that each time you bet 10 credits you will receive 9 in return – where’s the fun … exhilaration in that? Instead, the casino slot machine just won’t payout for a bit, and then suddenly go on a hot streak and you might draw the big pot prize.
The pay off percentages usually will vary between the assorted games and a couple of the very common casinos, for example Golden Online Casino, which gives a payout of up to ninety-five per cent!
Thus, in essence, the one-armed bandit takes all the funds played into it and pays it out to a number of privileged winners. The casino only gets to keep a generally low per cent of all the plays placed.
The casino slot software controls any part of the machine, from the flashing lights to the circulating of the reels.
When you hit spin on the one-armed bandit, a combination is formed by the RNG which is linked to the pictures on the reel.