
B–62755EN/01
9. TROUBLESHOOTING (SERIAL INTERFACE SPINDLE)
397
Item Cause of trouble Check procedure Remedy
1
Defective of power
transistor used for
power
Check power transistor. Replace power transistor.
2
Defective of power
regeneration circuit
Replace PCB.
Item Cause of trouble Check procedure Remedy
1
Motor constrained Check that nothing is
preventing the motor from
accelerating.
Remove cause.
2
Defective motor
speed feedback
signal
Check signal waveform.
(Alarm No. 2)
Remove cause.
3
Defective motor
speed feedback
signal cable
Check that cable is con-
nected securely to con-
nector.
Check that cable is not
broken.
Connect cable securely.
Replace cable.
Item Cause of trouble Check procedure Remedy
1
Defective LSI used in
serial data transmis-
sion
Replace LSI.
Replace PCB.
Item Cause of trouble Check procedure Remedy
1
Defective relay used
in DC link rechar-
ging.Disconnection of
resistor used in limit-
ing re-charge current
Check relevant parts. Replace amp.
Item Cause of trouble Check procedure Remedy
1
Incorrect parameter
setting
Check if specified param-
eter value is beyond al-
lowable range of values.
Specify value within allow-
able range.
and are alternately displayed in the spindle amplifier
indicator section if an AL–34 alarm is raised.
“XXX” indicates the data number internal to the spindle for a parameter
where a value beyond the allowable range is specified.
AL–34
F–XXX
Item Cause of trouble Check procedure Remedy
1
Parameter data of
gear ratio and posi-
tion gain are too
large.
Check gear ratio and
position gain data.
Change to suitable values.
AL–30 Input circuit
overcurrent
AL–31 Speed detection
signal
disconnection
motor restraint
alarm
AL–32 Abnormality in
RAM internal to
LSI for serial data
transfer
AL–33 Insufficient DC
link section
charging
AL–34 Parameter data
setting beyond
allowable range
of values
AL–35 Excessive gear
ratio data setting