Lenze m500-P Series - Checking the Component Parts

Maintenance/repair
Maintenance operations
Checking the component parts
8
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Lenze ¯ BA 33.0008 ¯ 5.0
Component Effect Influencing factors Cause
Friction lining Wear on the friction lining Applied friction energy
Braking during operation
(impermissible, holding
brakes!)
Emergency stops
Overlapping wear when
the drive starts and stops
Active braking by the drive
motor with the help of the
brake (quick stop)
Number of start−stop
cycles
Starting wear if motor is
mounted in a position
with the shaft vertical,
even if the brake is open
Armature plate and
flange
Running−in of armature
plate and flange
Applied friction energy Friction between the brake
lining and the armature
plate or flange e.g. during
emergency braking or
service brake operation
Teeth of the brake
rotor
Teeth wear (primarily at
the rotor end)
Number of start−stop
cycles,
Level of the braking
torque,
Dynamics of the
application,
Speed fins in operation
Relative movement and
impacts between brake
rotor and brake hub
Armature plate
bracket
Armature plate, cap screws
and bolts are deflected
Number of start−stop
cycles,
Level of braking torque
Load changes and impacts
due to reversal error
during interaction
between armature plate,
cap screws and guide bolts
Springs Fatigue failure of the
springs
Number of switching
operations of the brake
Axial load cycle and
shearing stress on the
springs due to radial
reversing error of the
armature plate
Tab. 2 Causes for wear
8.3.3 Checking the component parts
With a mounted brake ¯ Check ventilation function and activation/deactivation
¯ Check air gap (if required, re−adjust it)
¯ Measure rotor thickness (if required, replace rotor)
¯ Thermal damage of the armature plate or flange
(tarnished in dark blue)
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With a dismounted brake ¯ Check clearance of the rotor gear teeth (replace rotors that
are damaged by vibration)
¯ Damage by vibration of the torque support at the sleeve
bolts, cylindrical pins, and armature plate
¯ Check springs for damage
¯ Check armature plate and flange or end shield
– Evenness for size 06...12 < 0.06 mm
– Evenness from size 14 < 0.1 mm
– Max. run−in depth = rated air gap of the design size
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