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Better Protection via Reliable Brakes: Page 4
- The hyraulically-released ROBA-linearstop has also expanded its application range away from production line, handling and installation systems. For example, at the Expo 2006 in Japan, it ensured maintenance of the required safety standards in a lifting platform on the German trade fair stand. Eight ROBA-linearstop safety brakes were installed on this application. They were designed to engage simultaneously should a steel rope snap, thereby braking the entire system reliably within 35 ms.
In contrast to several other linear brake systems on the market today, the ROBA-linearstop does not ride on a carriage. This simplifies the process of laying supply cables. The brake can be screwed to a fixed machine part. A cylindrical rod is connected to the linear drive carriage, which is guided through the cental bore of the brake. When the carriage moves, this brake rod moves axially in the ROBA-linearstop. This arrangement guarantees a high level of operational safety and reliability. The braking force is generated by cup springs and transferred backlash-free onto brake callipers via a conical surface. These brake callipers clamp the brake rod steplessly, without altering its position. The brake can also be released mechanically by screwing in three screws so that the carriage can be moved in a depressurised condition.
ROBA-stop brakes function according to the fail-safe principle. They are closed when de-energised and therefore accord with the safety aspects required in all operating conditions, including emergency OFF and power failure. Even if the brake is damaged, for example due to supply cable breakage or coil failure on the electromagnetic brakes, the braking torque is maintained. Fail-safe therefore means that the brake effect is also ensured in adverse conditions and during operational malfunctions.
ROBA-stop safety brake prove their worth in daily operation on the most different of applications where there is a risk of danger to people. mayr power transmission has already developed completely new brake concepts in the past in accordance with national and international standards, for example for use in passenger elevators, hoists, stage drives and in crane technology. With its developments for vertical axes, the company re-affirms its leading position in the field of safety brakes.