| 摘要 |
PURPOSE:To return a moving body to its home position automatically in case of an overrun, by placing a switch means in a stop state when the ANDing between forward scan driving and an forward scan overrun and that between backward scan driving and a backward scan overrun are held. CONSTITUTION:An overrun stop indicating device 60 consists of AND gates AN3 and AN4 for discriminating on a scan driving direction, AND gates AN5 and AN6 for ANDing the scan driving direction and an overrun direction, and an OR gate OR2 which supplies a clutch release indicating signal to a transistor Tr2 as a driving control switch means when the ANDing is held. For example, if the ANDing between the forward scan driving and forward overrun is held and the moving body stops, the moving body is driven for a backward scan, and consequently the ANDing is not held to return the switch means to a driving state, so that the moving body returns to a scan range. |
