bowling allowing fallen "dead wood" pins to remain on the lane between each ball's roll, no provision has ever been made for "spotting cells" in a candlepin pinsetter's spotting table, simplifying the machines' design. Most parts of the machine are driven by chains – especially the sweep board's drive system, on two L-shaped tracks on either side of the unit – or belts. A Bowl Mor unit weighs approximate , and draws 24 amperes at 110 volts from three-wire 110-220 volt service mains. The ICBA lists the cost of a refurbished Bowl Mor unit at approximately $5000. AMF manufactured candlepin pinsetters for a short time in the 1960s, using a Bowl-Mor style spotting table and an adapted tenpin-style sweep bar that operated at an unusually rapid pace during its sweep. Unless triggered by an automated scoring unit, candlepin pinsetters must be started by the bowler at the conclusion of a frame, by pressing a button or foot pedal. Five-pin pinsetters Five-pin bowling is a popular variation in Canada, and pinsetters fall into two categories: string and free-fall. String pinsetters are more prevalent, and consist of machines attached to the head of each pin, by means of a cord. Essentially, the pinsetter is triggered by the movement of any pin by more than an inch or two. With that, the machine lowers a guard, pulls up all 5 pins, and resets those that did not move. There is, on average, a three-second lag from when the pins were knocked down to when the guard is lowered. The pit floor is angled such that the ball is gravity-fed to a track that leads to an elevator. The elevator lifts the ball to the return track. Free-fall 5-pin pinsetters work in a similar way to their ten-pin counterparts, and requires initiation by the bowler pressing a "reset" button as a candlepin unit does to "cycle" it, when a ball is bowled or pin knocked down. When the player pushes their "Reset" button, the machine lowers a guard, lifts standing pins and sweeps away the downed pins. If it does not recognize any standing pins, it sets up a new set for the next frame. Unlike tenpin, balls and pins are picked up in the same elevator or conveyor and are separated at the top of the machine. The PBS family of pinsetters are the most frequently used, and many consider the PBS as