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MKE Synchronous Servomotors
Cleaning and servicing
Bosch Rexroth AG
R911402016, Edition 02
Safe disconnection of the load circuit must
be ensured.
•
Temperature model or I
2
t-monitoring within
converter. Due to the coupling time of the
temperature sensor, an additional suitable
temperature model or an I
2
t-monitoring must
be used.
Shutdown
•
Please observe the notes in sec-
tion
Requirements for motor operation with holding
brake
•
Ensure the brake functionality during normal
operation due to voltage control, current
monitoring, cyclic control of the brake
holding torque, for example.
•
Provide an external or an integrated protec-
tive circuit within the foreign converter to
switch the holding brake (inductive load).
•
Never use the holding brake of the motor as
an operating brake.
•
Idle time after an emergency stop before
restarting ≥ 3 minutes.
•
Do not do the grinding procedure in haz-
ardous ambience.
General notes
•
The motors must be grounded via a motor
cable and via a second separate ground con-
ductor with minimum 4
mm² cross section.
Check that the position of the grounded con-
ductor is fixed before commissioning.
•
Use cables with a thermal stability of at least
80°C (176°F).
•
Plug connector: Never connect or disconnect
plug connectors under load!
•
Operate MKE motors only with origin connec-
tion accessories.
•
Observe the limit values for bearing load. If
necessary, change the bearing according to
Chapter 6.2.10 “Bearing” on page 35
After maintenance and repair work, Bosch
Rexroth always recommends to do a safety and
functionality test on basis of the risk analysis pro-
vided by the customer (e.g. for thermal protec-
tion, holding brake).
10
Maintenance
10.1 Cleaning and servicing
WARNING
Operations in the vicinity of live parts are
extremely dangerous.
−
Work required on the electric system may
only be carried out by skilled electricians.
Tools for electricians (VDE tools) are abso-
lutely necessary.
−
Isolate (even auxiliary circuits).
−
Secure against reactivation.
−
Ensure de-energization.
−
Ground and short-circuit.
−
Cover or shield any adjacent live parts.
WARNING
Personal and material damage during mainte-
nance work in operation!
−
Never carry out maintenance work on run-
ning machines.
While carrying out maintenance work,
secure the machine such that it cannot
restart or be used by unauthorized persons.
CAUTION
Hot surfaces with temperatures over 60 °C may
cause burns!
−
Allow the motors to cool down prior to com-
mencing work.
Wear safety gloves.
Do not work on hot surfaces.