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Safety in a six-pack
Manufacturer equips stage winch with six single brakes produced by mayr power transmission
In the action scenes shown in the box office hit 'Spiderman', the comic hero flies through New York street canyons. Socalled 'flying machines' are used to film such scenes. Stage winches convey stunt men through the air on thin wire ropes. Stage winches are also used in theatres, concert halls or concert stages to move, lift and lower scenery, curtains or heavy spotlights. In order to protect the actors, such winches are equipped with redundant safety brakes by mayr power transmission, which are specially designed for stage applications.
- Five ROBA-diskstop safety brakes produce the required braking torque on a stage winch. A sixth, redundant brake ensures the safety of the device. The torque increase during an emergency braking action is only 20 percent.
Not just the ROBA-stop -silenzio , the quietest stage brake on the market today, but also the grind-free, noise-damped caliper brakes from the ROBA -diskstop construction series are perfect for stage applications. They can be flexibly arranged on brake disks. The achievable braking torque determines the size and number of the brakes. Generally two brakes are used for stage winches which work completely independently of each other. Both of these brakes are capable of holding the load reliably alone. This ensures that the actors are always protected, even if one brake should fail. However, if both brakes work, this design leads to the braking torque doubling during an emergency braking action.
An American manufacturer positioned six of our single ROBA -diskstop caliper brakes on the brake disk of a stage winch. The high number of brakes is primarily required in order to achieve the required braking torque. However, the arrangement of several brakes also has an interesting positive side-effect. Just as on systems with two brake circuits, one brake also has the task of compensating for the failure of another brake. This means that an additional brake is sufficient to fulfil the requirement for redundancy.