| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the damage of an air motor and the occurrence of coating defects by rotating the air motor within the maximum number of revolution even in the case that the detected number of revolution by a revolution detector is abnormally decreased. SOLUTION: The revolution detector 8 for detecting the number of revolution of the air motor 3 is connected to a coater 1. An air source 9 is connected to the air motor 3 through an electric-pneumatic converter 10. The revolution detector 8 and the electric-pneumatic converter 10 are connected to a revolution controller 21 and the revolution controller 21 increases or decreases the air pressure supplied to the air motor 3 through an electric-pneumatic converter 10 to feedback control the number of revolution of the air motor 3. When the detected number of revolution by the revolution detector 8 is decreased abnormally up to the fixed low number of revolution, a recovery air pressure for driving the air motor at the number of revolution lower than the maximum number of revolution is supplied to judge whether the detected number of revolution is recovered or not by the revolution controller 21.</p> |
