| 摘要 |
PURPOSE:To attain feeding with high accuracy at a long stroke by providing a couple of belts of non-contracting/non-expanding property wound or rewound in no stacking state with the rotation of a motor output shaft. CONSTITUTION:A belt transmission mechanism consists of a couple of belts 26, 27 one end of which is fixed to the output shaft 23 of a pulse motor 22 and the other end is fixed to mounting blocks 24, 25 of a table 18 fixed with a magnetic head, and of idle pulleys 28, 29. Belt-like sections 26a, 27a and oblong through- holes 26b, 27b wider than the width of the belt-like sections 26a, 27a are formed to the belts 26, 27. When the output shaft 23 turns counter clockwise, the belt- like section 27a is unwound, the belt-like section 26a is wound and the table 18 is retrogressed. The amount of movement of the table 18 is decided with the output shaft 23 turned by 2 turns. In suing a belt 30, the amount of stroke corresponding to three turns of the output shaft is obtained. |
