- In the unlikely event of a lifting chain break, the safety cam will immediately and automatically rotate into position.
- Safety cams are mounted on the carriage and positioned between the flanges of the guide column.
- Spring-loaded safety and designed with a series of hardened teeth.
As the safety cams rotate into position, the downward pressure of the carriage forces them into the flanges of the guide columns, preventing carriage descent. When chain tension is returned to normal, the cams automatically rotate back to their inoperative position, allowing the VRC to resume normal operation. On the M Series and F Series, slack or broken chain conditions are sensed by a switch on the chain tensioner assembly which cuts power to the drive. (All units should be fully inspected before resuming service.)