11. Troubleshooting
11
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20
(26) Warning No. E1 : OVERLOAD WARNING
[Details]
The value of the current flowing to the spindle motor exceeded the overload detection
level (spindle parameter SP064: OLL), and continued longer than 80% of the overload
detection time (spindle parameter SP063: OLT).
Investigation items
Investigation results
Remedy
1 Investigate as in alarm
No. 50 , and carry
out the appropriate
measures.
(27) Warning No. E4 : PARAMETER ERROR WARNING
[Details]
A value was set during ready ON that exceeded the allowable range.
Investigation items
Investigation results
Remedy
1 Investigate as in alarm
No. 37 , and carry
out the appropriate
measures.
(28) Warning No. E7 : NC EMERGENCY STOP
[Details]
This warning occurs when an emergency stop signal is input from the NC, or when an
alarm occurs in another servo axis or spindle.
Investigation items
Investigation results
Remedy
The switch is ON.
Turn the emergency stop button
OFF.
1 Check whether the
emergency stop switch
is ON.
The switch is OFF.
Investigate item 2, and carry out the
appropriate measures.
Connector came (was coming) loose.
Excessive force was applied.
Install correctly.
2 Jiggle the connector
between the NC and
spindle drive unit to
see whether it is
coming loose. Also
check if there is any
excessive force being
applied to the
connectors.
No particular problem.
Investigate item 3, and carry out the
appropriate measures.
There was a connection fault.
Replace the cable.
3 Disconnect the cable
between the NC and
spindle drive unit, and
check the connection
with a tester.
There was no connection fault.
Investigate item 4, and carry out the
appropriate measures.
4 Investigate the wiring
and installation
environment.
1) Are the units
correctly grounded?
1) The grounding is incomplete.
Correctly ground the units.
2) The alarm occurs easily when a
specific device is operated.
Execute noise countermeasures for
the device at the left.
2) Are there any
devices that
produce noise
around the units?
No particular problem.
Replace the spindle drive unit.