Pinsetter Theory of Operation and Malfunctions The purpose of this page is to give a bowler a bit more information on what causes a pinsetter stop or malfunction. The machines are designed ideally to run, X number of cycles, malfunction free. As we all know, and probably seen that is not always the case. Pinsetters are much like kids, some days they behave and other days you just want to beat their butts. Yes the machine are old, but the machine are by no means ...