| 摘要 |
<p>A printer shuttle apparatus of the kind having a reciprocating print shuttle unit and a counter-reciprocating balance shuttle unit. The apparatus further comprising means (17), for detecting the position of the print shuttle unit, a linear motor (15, 16) for driving the print shuttle unit, a further linear motor (25, 26) for driving the balance shuttle unit, a drive circuit (5) for driving the linear motors and a controller (6) for controlling the drive circuit (5), in response to a signal from the print shuttle unit position detecting means (17), to drive synchronously the print shuttle unit and the balance shuttle unit. There is also means (27) for detecting the position of the balance shuttle unit, signals from which are supplied to the controller (6) to allow monitoring of overrun of the balance shuttle unit by the controller. <IMAGE></p> |
