| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging unit that keeps a safety factor in selecting a drive unit, that is, suppresses a margin degree low, is capable of preventing the failure of the drive unit even if it is a low price drive unit at a minimum capacitance required, and is capable of performing effective production without stopping machinery. <P>SOLUTION: When effective torque calculated by effective torque detecting sections (27, 36) exceeds a predetermined upper limit value in effective torque determining sections (28, 37), the rotational speed of the drive units (10, 14, 23 and 24) is reduced to prevent a temperature from increasing due to the heat generation of parts inside the drive units. <P>COPYRIGHT: (C)2003,JPO |
