Lenze MDFQA Operating Instructions - Manual (Page 27)

Mechanical installation
Holding brake (option)
Spring−applied holding brakes
5
EN
27 Lenze ¯ BA 33.0006 ¯ 3.0
Component Effects 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