MAINTENANCE
9-3MS 3000 • 9095-032A
9.3 The motor brake
The motor has a built-in electromagnetic
brake. This brake functions according to
the "normally ON" principle, that is, when
the motor has no power supply the brake is
active and the motor shaft will be braked.
(n = 0 rev./min).
The braking effect is achieved by friction
between several discs and the brake must
be used "dry" (not greased).
9.3.1 Operation
The brake mechanism has a metal rotor
(3) with friction material on both sides.
Four pressure springs (7) in the stator
exert an axial force on an anchor plate (4).
This anchor plate is pressed by the spring
force against rotor. The rotor is mounted on
the motor shaft in such a way that it can
slide in an axial direction along the shaft.
Because the anchor plate presses against
the rotor, the rotor is pressed against the
friction plate (1). The contact between the
friction material on either side of the rotor,
the anchor plate and the friction plate
results in the required braking effect.
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