Troubleshooting and action fanuc alpha-i series – kfasllc.com

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TROUBLESHOOTING AND ACTION

FANUC ALPHA-i SERIES SPINDLE AMPLIFIER MODULE
Model       Order Specification
SPM-2.2 i   A06B-6111-H002
SPM-5.5 i   A06B-6111-H006
SPM-11 i    A06B-6111-H011
SPM-15 i    A06B-6111-H015
SPM-22 i    A06B-6111-H022
SPM-26 i    A06B-6111-H026
SPM-30 i    A06B-6111-H030
SPM-2.2 i   A06B-6112-H002
SPM-5.5 i   A06B-6112-H006
SPM-11 i    A06B-6112-H011
SPM-15 i    A06B-6112-H015
SPM-22 i    A06B-6112-H022
SPM-26 i    A06B-6112-H026
SPM-30 i    A06B-6112-H030

If an alarm occurs in the spindle amplifier module, the ALM LED lights red in the
STATUS display, and the two-digit 7-segment LEDs indicate the alarm code.
The ALM LED lights red.


Alarm Code 01
      The inside temperature of the motor is higher than the specified
temperature.
             (1)If this alarm is issued during cutting (the motor temperature is
             high)
                     (a)Check the cooling state of the motor.
                               <1>If the cooling fan of the spindle motor is stopped,
                     check the power supply of the cooling fan. If the cooling fan
                     is still inoperative, replace it with a new one.
                               <2>When a liquid-cooled motor is used, check the
                     cooling system.
                               <3>When the ambient temperature of the spindle
                     motor is higher than the specified temperature, lower the
                     ambient temperature to satisfy the specification.

                     (b)If this alarm is issued even when the load meter fluctuates
                     in a limited range, check the short-period rating. If the
                     specified value is exceeded, reduce the load.

              (2)If this alarm is issued under a light load (the motor temperature
              is high)
                 (a)When the frequency of acceleration/deceleration is too
                 high set such a condition that the average including output at
                 acceleration/deceleration does not exceed the continuous
                 rating.

                 (b)The parameters specific to the motor are not correctly.
                 Referring to "FANUC AC SPINDLE MOTOR i series
                 Parameter Manual (B-65280EN)," check the motor-specific
                 parameters.

          (3)If this alarm is issued when the motor temperature is low

                 (a)The spindle motor feedback cable is faulty. Replace the
                 cable.

                 (b)The control printed circuit board is faulty. Replace the
                 control printed circuit board or spindle amplifier.
                 (c)The motor (internal thermostat) is faulty. Replace the
                 motor.


Alarm Code 02
    The actual motor speed is largely deviated from the commanded speed.

          (1)If this alarm is issued during motor acceleration

                 (a)The parameter setting of acceleration/deceleration time is
                 incorrect. Set the following parameter with the actual
                 acceleration/deceleration time for your machine plus some
                 margin.
                 Fanuc-15i PRM 3082 or Fanuc-16i/18i/21i PRM 4082
                 Setting of acceleration/deceleration time

                 (b)The parameter for the speed detector is not set correctly.
                 Refer to "FANUC AC SPINDLE MOTOR i series Parameter
                 Manual (B-65280EN)," and set a correct value.

          (2)If this alarm is issued at a heavy cutting load

                 (a)The cutting load has exceeded the motor output power.
                 Check the load meter indication, and review the use
                 condition.
                    (b)The parameters for output restriction are not set correctly.
                    Check that the settings of the following parameters satisfy
                    the machine and motor specifications:
                    Fanuc-15i PRM 3028 Fanuc-16i/18i/21i PRM 4028
                    Output restriction pattern setting
                    Fanuc-15i PRM 3029 Fanuc-16i/18i/21i PRM 4029
                    Output restriction value

                    (c)The parameters specific to the motor are not correctly.
                    Refer to "FANUC AC SPINDLE MOTOR i series Parameter
                    Manual (B-65280EN)," and check the motor-specific
                    parameters.


Alarm Code 03
        The fuse of the DC link has blown. (The voltage at the DC link is
insufficient.) This alarm is checked when emergency stop is cancelled.

             (1)If this alarm is issued during spindle operation (rotation) The fuse
             of the DC link inside the SPM has probably blown. So, replace the
             SPM. This alarm may be caused by the following:

                    <1>Power lead short-circuited to ground
                    <2>Motor winding short-circuited to ground
                    <3>IGBT or IPM module failure

             (2) If the PSM input magnetic contactor is once turned on and is
             turned off with this alarm when emergency stop is cancelled or the
             CNC is started (When two spindles are connected, the magnetic
             contactor may not be turned off.)

                    (a)The DC link wire is not connected. Check the DC link
                    wiring for errors.

                    (b)A cable is faulty. Pin 9 of the interface cable (CXA2B-
                    CXA2A) between the PSM and SPM may be short-circuited
                    to 0V. Replace the cable.

                    (c)The fuse of the DC link inside the SPM has blown.
                    Replace the SPM.


Alarm Code 06
      The temperature sensor is abnormal, or the temperature sensor cable is
broken.
             (1)The parameters specific to the motor are not correctly. Refer to
             "FANUC AC SPINDLE MOTOR i series Parameter Manual (B-
             65280EN)," and check the motor-specific parameters.

             (2)Cable is faulty. Feedback cable is faulty. Replace the cable. (3)A
             thermo sensor is faulty. Replace the motor (thermo sensor).


Alarm Code 07
     The motor rotates at a speed exceeding 115% (standard setting) of the
maximum allowable speed.

             (1)If this alarm is issued during spindle synchronization If one of the
             motors operating in spindle synchronization is deactivated (SFR or
             SRV) and activated again, the spindle motor may accelerate to its
             maximum rotation speed in order to eliminate the position error
             accumulated while the motor is off, resulting in this alarm being
             issued. Modify the ladder in such a way that this sequence will not
             be used.

             (2)If this alarm is issued while the motor is stopped

                    (a)The connection cable of the spindle sensor is faulty.
                    Check that the cable of the spindle sensor leading to the
                    motor is intact. Replace the cable if necessary.

                    (b)The motor is vibrating. Refer to "FANUC AC SPINDLE
                    MOTOR i series Parameter Manual (B-65280EN)," and
                    adjust the parameters (4040 to 4055 for the FS16i and 3040
                    to 3055 for the FS15i) related to the velocity loop gain.

                    (c)The spindle sensor is not adjusted correctly. Adjust the
                    sensor.


Alarm Code 09
       The temperature of the heat sink of the SPM main circuit has risen
abnormally. This alarm is issued for SPM-15i and later. With SPM-2.2i to SPM-
11i, however, alarm code 12 is issued for the same cause.

             (1) If this alarm is issued during cutting (the heat sink temperature
             is high)

                    (a) If this alarm is issued when the load meter reads a value
                    below the continuous rating of the amplifier, check the
                    cooling state of the heat sink.
                           <1> If the cooling fan is stopped, check the power
                           supply (connector CX1A/B). If the cooling fan is still
                           inoperative, replace the SPM with a new one.

                           <2> When the ambient temperature is higher than the
                           specified temperature, lower the ambient temperature
                           to satisfy the specification.

                    (b) When this alarm is issued because the load meter reads
                    a value above the continuous rating of the amplifier, improve
                    the use method.

                    (c) When the heat sink on the back of the amplifier is too
                    dirty, clean the heat sink, for example, by blowing air.
                    Consider the use of a structure that prevents the heat sink
                    from being directly exposed to coolant.

             (2) If this alarm is issued under a light load (the heat sink
             temperature is high)

                    (a) When the frequency of acceleration/deceleration is too
                    high, modify the cutting condition so that the average
                    including output at acceleration/deceleration does not
                    exceed the continuous rating.

                    (b) The parameters specific to the motor are not set
                    correctly. Refer to "FANUC AC SPINDLE MOTOR i series
                    Parameter Manual (B-65280EN)."

             (3) If this alarm is issued when the heat sink temperature is low.
             Replace the SPM.


Alarm Code 12
      An excessively large current flowed into the DC link of the main circuit.
With SPM-2.2i to SPM-11i, this alarm indicates that the power module (IPM) of
the main circuit detected an error such as an excessive load, over current.

             (1) If this alarm is issued on SPM-2.2i to SPM-11i Check alarm
             code 09 as well.

             (2)If this alarm is issued immediately after a spindle rotation
             command is specified.
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