There is no one definitive answer to this question as it depends on the specific roulette machine in question. However, a number of roulette machine manufacturers have admitted to rigging their machines in order to produce more favorable results for players.
This means that, on average, roulette machines tend to give players worse odds than they would receive if the machine was fair.
This is due in part to the fact that roulette machines are designed to give players a range of possible outcomes, even if those outcomes are not always likely. This can lead to players being more likely to hit a lucky streak, or to get unlucky and lose all their money.
As such, it is generally recommended that players do not rely on roulette machines as their only source of income. Instead, they should consider betting on horse races or other types of gambling which are more likely to be fair.
