These markers operate on a synergy of electronics and mechanical actions. There are fewer springs in electro-pneumatic markers, and the servos tend to be more reliable than springs. The biggest advantage is that, since the player is essentially pulling a switch, the computer can be set to play in semi-automatic mode, too. However, a lot of times, even that is not enough to convince tournaments to allow these types of markers onto the fields, since tournament rules dictate that balls be gravity-fed into the chamber. The expressions and opinions of this article are the sole property of the author.
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