NORD Drivesystems B1904 - Manual (Page 21)

Operating and Installation Instructions FDB (Getriebebau NORD)
Version 08.2011
Page 21 of 23
5.1.3.2 Replace the rotor
When the minimum rotor size s
min
according to 3.2.2.4 is reached, a re-adjustment of the air
gap “a” is no longer possible and the rotor has to be replaced. An operative readiness of the
brake in certain cases falling below the minimum rotor size does not change the above
statement; in such a case “a proper use” is no longer existing.
ÎStop!
Even after an exchange of the rotor, the complete braking torque will only be effective
after the brake linings at the rotor have run in!
Î For deviation values to M
bN
: see 3.2.2.1
ÎAttention!
During the task of replacing the rotor, all the mechanical parts associated with the
transmission of the braking torque have to checked for excessive wear (armature disc,
hollow screws) and/or integrity (springs) and, if required, to be replaced
!
5.2 Brake out of Operation (Malfunctions)
The following table includes typical problems during commissioning or running in, their possible
causes and instructions on solving them.
Malfunction Possible causes Solution .
Brake does not Air gap too large Check and readjust air gap
release
Brake is not supplied Check electrical
with voltage connection
Voltage at the coil Check the supply voltage
too low of the coil
Armature plate obstructed Remove obstruction
Brake releases Air gap too large Check and readjust air gap
with delay
Voltage at the coil Check the supply voltage
too low of the coil
Brake does not Voltage at the coil Check the supply voltage
apply too large of the coil
Armature plate obstructed Remove obstruction
Brake applies Voltage at the coil Check the supply voltage
with delay too large of the coil