| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable sure recovery even if step-out occurs while suppressing noise or vibration. <P>SOLUTION: During a period until an actual opening of a hopper gate 11 detected by an opening detector 113 reaches a set opening stored in a memory 153, a pulse is sent out in accordance with a first pulse pattern stored in the memory 153 corresponding to the actual opening where a first pulse pattern is formed by making an angle of the hopper gate associated with a torque adjustment parameter. When the step-out is detected on the basis of the actual opening and a command opening based on the pulse number in accordance with the sent first pulse pattern, the pulse is sent out in accordance with a second pulse pattern stored in the memory 153 where the second pulse pattern includes alternate normal and long period duration, and the pulse period in the long period duration is longer than that of the normal period duration. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT</p> |
