positioning member and the collar stay supply member is fixed on the block 10 the positioning member and the collar stay supply member are fixed on the l shape plate 12 two motors 20 and 30 are mounted on the l shape plate 12 the positioning member utilizes a gear 21 to connect to a shaft of the motor 20 the gear 21 drives an assisting gear 23 disposed on the assisting shaft 22 the assisting gear 23 engages the rack at an end of the moving plate 40 so that the moving plate 40 connects to the motor 30 is rotatable therewith due to the moving plate 40 is disposed between the motor shafts by bearing 41 the motor 30 rotates without affecting the moving plate 40 the moving plate 40 is rotatable to move or to position via a detecting plate 42 screwed thereon and a sensor 50 fixed on the l shape plate 12 for controlling the motor the collar stay supply member utilizes a bevel driving gear 31 to connect to a shaft of the motor 30 the bevel driving gear 31 is disposed between the motor 30 and the moving plate 40 and cooperates with a bevel driven gear 32 disposed at an end of a post with threaded 33 the post with threaded 33 and the sleeve 34 are fixed on the moving plate 40 by screw a moving base 35 is slidably disposed on the post with threaded 33 a side.