Servo brake outperforms permanent magnet types
Mayr has developed a servo brake based on the tried and tested design of the ROBA stop electromagnetic fail-safe brake.
Mayr has developed a servo brake based on the tried and tested design of the ROBA stop electromagnetic fail-safe brake.
This new servo brake is free from the problems normally encountered by conventional servo brakes using permanent magnets.
The Mayr servo brake transmits the torque from the splined motor shaft to the rotor which is equipped with special organic friction linings with a high consistent coefficient of friction suitable for up to 120C.
The Mayr servo brake is released electromagnetically and activated via spring pressure.
A major advantage of the servo brake is its low mass and inertia compared with similar permanent-magnet brakes.
Modern servomotors are equipped with absolute position encoders, and so the absence of backlash is not a major issue.
Negligible backlash is completely acceptable and is compensated within the drive.
This makes it possible to design servo brakes that are simpler and thus more reliable.
With the new brake, in spite of the possibility of backlash compensation, the backlash between the shaft and friction linings is reduced to a minimum via precision splines, ensuring a high degree of wear resistance.
The simple a robust design of the new Mayr servo brake ensures that relatively costly procedures can be omitted during assembly.
The operating air gap does not require setting and precise axial positioning on the motor shaft is not necessary.
The brake will always function correctly and reliably with a constant air gap and is not affected by bearing tolerances and increases in temperature.
The cost of assembly is less than that of a permanent-magnet brake together with a reduction in assembly errors.
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