| 摘要 |
<p>A system for controlling screw tightening, synchronously controlling screw tightening devices while avoiding the inclination etc. of a workpiece by a simple method. The system has the screw tightening devices and a control device. The control device changes stepwise operating conditions of the screw tightening devices while synchronizing the conditions at synchronization points. For at least some of the screw tightening devices, the control device changes the timing of the start of a change in operating conditions from that of the remaining screw tightening devices.</p> |
