The ROBA®‑alphastop® is a spring-applied, electromagnetic safety brake.
The ROBA®‑alphastop® is easy to install in an existing design between the servomotor and bell housing without modifications.
In de-energized condition, helical springs press against the armature disk. The rotor is held between the armature disk and the flange plate. The shaft is braked via the toothed hub.
When the power is switched on, a magnetic field is built up. The armature disk is attracted against the spring force to the coil carrier. The brake is released, and the shaft can rotate freely.
Product features
Application
Keeps axes secure in every position.
Optimal for vertical axes
Ideal for handling large weights
Mounting position
A-bearing-side on servomotors (also Fanuc)
Safety
Reliable due to fail-safe principle
Switching condition monitoring
Suitable for EMERGENCY STOP braking
Benefits
Short switching times
Design
Electromagnetic
Features
Complete unit with backlash-free shaft coupling (steel bellows, elastomer, or disk pack couplings)
Available with output shaft for direct mounting onto a hollow shaft gearbox
Available with adapter kit to adjust to different shaft distances
