SSD Parvex ex4 Aufstellung Und Betrieb Seite 30

EX4
You find that you
cannot rotate the
motor by hand:
You have trouble
starting or running
the motor:
You discover that
the motor drifts:
You notice that the
motor is racing:
You detect
vibration:
If the thermal
probes are
activated:
You find the motor
too noisy:
– Check that no mechanical parts are blocking it, and that it is not
jammed.
– Check the power supply to the brake.
– Check on the fuses, the voltage at the terminals (there could be an
overload or the bearings could be jammed), also checks on the load
current.
– Check the power supply to the brake (+ 24 V ± 10 %) and its
polarity.
– Check on any thermal protection.
– Check on the servomotor insulation (if in doubt, carry out hot and
cold measurements).
The minimum insulation resistance value measured under a max. 50V
DC is 50 MΩ:
•
Between the phase and the casing
•
Between the thermal protection and the casing
•
Between the brake coil and the casing
•
Between the resolver coils and the casing.
– Reset the offset of the servoamplifier after having given a zero
instruction to the speed input.
– Check that the servoamplifier speed instruction is set to 0 V.
– Check that you are not in torque control mode instead of speed
control mode.
– Check on the servomotor phase order: U, V, W
– Check on the resolver connections, the ground connections, the
earthing, the setting for the servoamplifier speed loop, and the
shielding.
– Check on the stability of the auxiliary voltages.
– It could be overloaded: check on the current and the servomotor
operating cycle.
– There could be too much machine friction:
•
Test the motor load and no-load currents.
•
Check that the motor is not thermally insulated.
•
Check that there is no friction from the brake when the brake
power is on.
Various possible reasons:
•
Poor mechanical balancing
•
There is friction from the brake: mechanical jamming.
•
Faulty coupling
•
Different parts require tightening
•
Unsuitable servoamplifier or position loop settings: check on
the rotation with the loop open.
26
PVD 3566A – 12/2004
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