| 摘要 |
PURPOSE:To increase the sending accuracy of a carriage, by reducing the shifting degree of the carriage to the angle of revolution of a driving motor in order to drive a belt and then to shift the carriage. CONSTITUTION:A carriage 1 is held by a pair of guide members 3 and 3 made of metallic bars so that it can have a linear motion. A driving pulley 4 is turned by a driving motor. A coil spring 10 is stretched between an end of the carriage 1 and a hook part 11 of a chassis, and a coil spring 13 is stretched between a tension pulley 7 and a hook part of the chassis. The both ends of the belt 14 is stuck to the part 11 and a major driving pulley 5, and the middle part of the belt 14 is hooked to a major tension pulley 8. The both ends of a belt 15 are stuck to the other end of the carriage 1 and a minor driving pulley 6, and the niddle part of the belt 15 is hooked to a minor tension pulley 9. |
