31
32
4. Torque Overload
When the Load Monitor LED (Load) [
12
] lights 4 or more LEDs (3 green LEDs and 1 or more
yellow LEDs) an overload condition exists. During overload operation the follow occurs.
(1) Warning LED (Warning) [
20
] flashes
(2) Warning Code A3 is displayed on the Digital Speed Indicator [
11
]
(3) Warning Signal is output to the Warning Signal (Warning) of Input/Output Connector
Overload operation is considered short term operation mode. The allowable operation time
depends on the number of lighted LEDs on the Load Monitor LED (Load).
The allowable time is detailed below.
(1) Load Monitor LED 4 LEDs : 30 Seconds
(2) Load Monitor LED 5 LEDs : 10 Seconds
(3) Load Monitor LED 6 LEDs : 5 Seconds
When the allowable time is exceeded the motor will stop and the following occurs.
(1) Error LED (Error) [
19
] flashes
(2) Error Code E8 is displayed in the Digital Speed Indicator [
11
].
(3) Error Signal is output to the error signal PIN8 (ERR) of Input/Output Connector A.
CAUTION
If you operate the system in short term operation for long periods of time the
control unit will overheat and damage to the motor and spindle is possible.
NAKANISHI recommends only continuous duty operation (Load LED has 3 LEDs lit :
Torque Load Monitor (Load) voltage is less than 5V.
The E3000 is a high-precision, high-speed motor-spindle, the following procedure must be
followed to ensure proper operation and longevity.
During transportation, storage or installation the grease inside the bearings will settle. If the
motor-spindle is suddenly run at high-speed excessive heat will cause bearing damage. After
installation, repair, initial operation, or long periods of non operation please follow the break-
in procedure detailed in Table 4.
1
2
3
4
5
60,000
10 Min
min
-1
Running Time
Items to Check
15,000
15 Min
No Abnormal
Noises
30,000
10 Min
Spindle Housing
no hotter than
20°C. If hotter
than 20°C stop
for at least 20
minutes, check
installation and
restart Break-In
procedure.
40,000
50,000
10 Min
10 Min
Spindle Housing
no hotter than
20°C. If hotter
than 20°C stop
for at least 20
minutes, check
installation and
restart Break-In
procedure.
Spindle Housing
no hotter than
20°C. If hotter
than 20°C stop
for at least 20
minutes, check
installation and
restart Break-In
procedure.
Spindle Housing
less than 20°C.
BREAK-IN PROCEDURE
Table 4
Steps
3. Resetting System after Error Codes
There are 2 methods of releasing error codes.
(1) Push Error Reset Switch [
18
] RESET on the front panel.
(2) Switch the signal on PIN4 (RESET) of Input/Output Connector A OFF (Open)
ON
(Closed)
OFF (Open).
When releasing Error using the Motor Start/Stop (Pin No. 14 : START) is ON (Closed),
OFF (Open) Motor Start/Stop before resuming operation.
Error Code
Problem Area
Trouble
E1
E2
E3
E4
E5
E6
E8
EA
EH
EE
EC
E7
Excess Current
Over voltage
Motor Sensor
Control Unit Overheat
Brake Circuit Trouble
Rotor Lock
Low Air Pressure
Torque Overload
External Control Signal
Error
Over Speed
Emergency Stop Error
Internal Memory Error
Trouble with the sensor signal in the motor
Internal Temperature of the Control Unit too High
Trouble with the motor brake circuit
Motor stalled for more than 3 seconds
Inadequate air supplied for more than 4 seconds during rotation
or inadequate air supply when motor start commanded.
Torque limits exceeded for too long a period of time.
External control sequencing problem
E9
Communication
Interception
Intercept communication with Selector Unit (NE212)
(Only if using NE211 connect to NE212)
Rotating speed is beyond the set speed for too long
Safety Relay has been activated and the Emergency Stop
System has stopped the motor
Trouble with memory (EEPROM)
Motor Current beyond safe limits
Motor Voltage beyond safe limits
EL
Incompatible Motor
Incompatible motor is connected to the system.
Table 3
18
CAUTION
•
When using the Input/Output Connector and external monitoring please check
and resolve the source of the trouble anytime a Warning Code is displayed.
•
The following Error Codes cannot be released : E4 (Control Unit Overheat), E5
(Brake Circuit Trouble), E9 (Trouble with Power Source), EC (Internal Memory Error).
Once the source of the error is corrected, turn the system off and the Error Code
will be released when the system is turned on.
E3000C̲K0446E̲e̲080108 08.1.8 6:34 PM ページ31
