| 摘要 |
<p>The invention provides an electronic component mounting apparatus, which enables a transmission belt which connects a shaft of an absorbing nozzle and a shaft of a motor rotating the absorbing nozzle to stably return to origin. A transmission belt (23) which connects a driving pulley (22) mounted on a shaft of a theta axis motor (21) and a driven pulley (12c) mounted on an absorbing nozzle shaft (12a) is provided with a pulley (24) which is arranged in the midway of the transmission belt and is used for searching the origin of the transmission belt, and the tooth number L of the transmission belt (23) is equal to the least common multiple of the tooth number m of the driving pulley (22) and the tooth number p of the pulley (24). Besides, a motor encoder (25) for detecting the origin of the driving pulley (22) and an origin sensor (26) for detecting the origin of the pulley (24) are provided, and the origin of the transmission belt (23) is searched on the basis of the relation between the origin position of the driving pulley (22) and the origin position of the pulley (24), thereby returning the transmission belt (23) to the origin.</p> |
