| 摘要 |
PROBLEM TO BE SOLVED: To enable to easily and accurately specify a relative position relation between the rotation angle of an exclusive motor and the position of a driving target by a user, too. SOLUTION: When a detection arm 40 is controlled to a prescribed operation position which is expressed by the chain line position and at which the amount of terry is zero, a starting point-presetting switch 49 is switched on. By the switch-on operation, a control circuit 37 memorizes a grasped standard position- reflecting element from a rotary encoder 282 into a memory 36. When the starting point-returning switch 50 is switched on, the control circuit 37 operates a terry motion motor 28 at a considerably slower rate than a rotation rate on a weaving operation. After a proximity switch 41 is switched from ON into OFF, the control circuit 37 memorizes a rotation angle as a standard position into the memory 36, wherein the rotation angle is obtained, when the rotary encoder 282 outputs a first starting point pulse. |
