Roba-linearstop Gets Dynamic Brake Approval
27 September 2012
Most linear braking elements available today can only be applied to static axes and work purely as clamping units. Following extensive testing, it is reported that Mayr’s ROBA-linearstop has now received formal approval to be used as a dynamic brake in addition to its existing holding brake approval.
To gain approval the brakes were switched statically one million times load free and one million times in a fully loaded condition. Then, at every thousandth switching, the brakes were switched dynamically to arrest a moving load. In fatigue tests the ROBA-linearstop achieved 30,000 dynamic applications under maximum load which far exceeds the legislative requirement of 1000 applications.
The units are offered in four sizes delivering between 1.5 and 40kN of retention force, and provide backlashfree braking in either direction on axes operating at up to 2m/s. The brake is released pneumatically at 4 to 6 bar dependent on the configured braking force.