SMT-BD2
3 - OPERATING PROBLEMS
3.1
-
M
OTOR SUPPLIED
,
BUT NO TORQUE
Check
the
Maximum current
and
Rated current
parameters.
Check that the current limitation input (X4 pin 3) is not activated.
Check that the amplifier is not operating in torque mode (X4 pin 4 active) with zero input command or with
CV0 input activated.
3.2
-
M
OTOR DOES NOT MOVE
Check that the amplifier is on.
Check that the power supply is on.
Check the amplifier fuses (F1 and F2) and the motor connection.
Check the wiring of the signals FC+, FC- and ENABLE.
3.3
-
S
HAFT LOCKED
,
ERATIC OSCILLATIONS OR ROTATION AT MAXIMUM SPEED
Check that the
Pulse input mode
is disabled in the
Advanced functions
menu.
Check the encoder wiring on the X1 connector and the mechanical mounting of the encoder on the motor.
Check the value of the
Motor parameters
parameter in the
Advanced Functions
menu and repeat the
Auto-phasing
procedure, with unloaded motor.
3.4
-
D
ISCONTINUOUS MOTOR ROTATION WITH ZERO TORQUE POSITIONS
Check the connection of the 3 phase cables between motor and amplifier.
3.5
-
M
OTOR DRIFT WITH ANALOG INPUT COMMAND AT ZERO SPEED
Check that the input command wiring between the controller and the amplifier corresponds to the
recommendations of
chapter 4
(CV at diff. low of the NC and 0 Volt cable).
Check the offset compensation and, if necessary, execute the
Offset compensation
procedure.
3.6
-
L
OUD CRACKLING NOISE IN THE MOTOR AT STANDSTILL
Check that the motor-amplifier-controller ground connections correspond to the recommendations
of
chapter
4.
Check that the speed input command wiring between controller and amplifier corresponds to the
recommendations of
chapter 4
and check the shield connection of the encoder cable.
3.7
-
L
OUD NOISE IN THE MOTOR AT STANDSTILL AND WHEN RUNNING
Check the rigidity of the mechanical transmission chain between motor and load (backlash and elasticity in
the gearboxes and couplings).
Execute
the
Auto-tuning
procedure again by choosing a lower bandwidth (
Medium
or
Low
).
If the problem remains, renew the
Auto-tuning
procedure by activating the
Antiresonance
filter.
3.8
-
P
OSITION CONTROL NOT POSSIBLE WITH THE
NC
Check for the presence of the A, B and Z signals on the amplifier X2 connector by turning manually the motor
shaft and check the wiring between NC and amplifier.
Check for the correct
Maximum speed
and
Encoder output resolution
parameters.
Check for the counting direction of the NC with regard to the sign of the speed input command. If there is a
reversal, use the function
Reverse Movement
to get a correct operation.
48
Chapter 7 – Fault finding