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The electromagnetic Roba linear stop brake in the vertical axis prevents the axis from sagging and thus protects people and material. © FLT

Whether for loading and unloading machine tools or machining centers, transferring parts or transporting devices, tools or machining systems - the modular axis and gantry system from Fibro Läpple Technology (FLT) is designed for use in a wide range of industrial applications. "The special thing about FLT is that we produce automation solutions for a wide range of industries and for all machining and handling processes," explains Boris Bind, Head of Mechanical Design & Development at FLT in Hassmersheim. "With our modular concept, we can respond flexibly to customer requirements."

As a compact braking unit, the Roba-Linearstop can be easily integrated into existing machine and system designs. © Mayr

As a compact brake unit, the Roba-Linearstop can also be integrated into existing machine and system designs quickly, easily and without time-consuming adjustment work. It acts on a separate brake rod. When the brake closes, the rod is held without play.

The Roba-Linearstop works without a self-reinforcing wedge effect and therefore works in both directions of movement. By generating force without a self-amplifying wedge effect together with very short reaction times, the axle does not sag when closing. Other linear braking systems that work with a self-amplifying wedge effect generate a high braking force. However, the wedge effect only works in one direction, and to generate the wedge effect, the brake has to "follow suit" when closing.

If the wedge effect of the brake is not limited, the braking force increases to infinity. The machine design must absorb this impact. In addition, the clamp often has to be released with enormous force to release the brake. This is not necessary with the Roba-Linearstop. "It is important for us that the peak load that occurs during braking is not too high," adds Boris Bind. "We need a constant force curve when braking, then the bracket can be smaller. The brake also has to be compact, as there is little space available overall."

The linear brakes available on the market today mostly function as static clamping units and are designed to keep the axes at a standstill. However, people can also be under suspended loads during commissioning, maintenance or even during the production process without the load having been transferred to the mechanical linear brake beforehand. If a complete failure of the drive occurs in these operating states, the linear brake is solely responsible for safely decelerating the load. This is why the safety brakes, which are available in pneumatic or hydraulic versions as well as electromagnetic versions, are more than just clamping units. They are designed to hold the load securely and are also suitable for emergency braking. Before a brake leaves the Mayr factory in Mauerstetten, the required force is set with the appropriate level of safety. This value is tested and documented and can therefore be traced back to each serial number. To make this possible, the company has a wide range of modern testing options and can draw on decades of experience in development and design. The electronic database, in which the measured values are archived together with the corresponding serial numbers of the product, guarantees 100% traceability. as