Emergency stop control for motor of printing press - includes timer for stopping within limit calculated from max. deceleration rate between stages of gradual change.

摘要

The cylinders of the machine are coupled together by a train (4) of gear wheels, one of which is driven by the motor (5). The control loop includes a rotational speed set-point (7) with a memory (12) and timer (13), and an inverter controller (8). In emergency the set-point is activated to reduce the speed in three stages, involving very rapid deceleration between gradual initial and final reductions. ADVANTAGE - Rundown of machine within predetermined time interval is guaranteed with avoidance of damage due to impact between gear teeth at start and finish.