NSK M-EGA-15A2301, User Manual

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8.Maintenance Trouble shooting
8-1
8.1 Trouble shooting
When troubles occurred without any alarm displayed, check and take corrective actions for them by
referring to the description below. When alarm occurs, take corrective measures referring to
“
Trouble Shooting When Alarm Occurs
“
.
■
“≡“
does not blink in 7-segment LED even if main power is ON.
Investigation Assumed causes and corrective actions
Check the voltage at the power input terminal.
■
If voltage is low, check the power supply.
■
Check that wires and screws are fastened properly.
Red
“
CHARGE
“
LED goes out.
■
Internal power circuit of driver is defective, so
replace the driver.
Over-travel status.
Emergency Stop status.
■
Stop the input of Over-travel.
■
Stop the input of Emergency Stop.
■
Check of
“
Functions enabling condition settings
“
7 segment LED is blinking displaying "
≡
".
■
Carry out Magnetic Pole Position Estimation
function.
7 segment LED lights up continuously
displaying "O (lower half)".
■
Magnetic Pole Position Estimation signal stays ON.
■
7-segment LED displays a rotating character
“
8
“
(Servo ON status), but motor does not rotate.
Investigation Assumed causes and corrective actions
Check the command is inputted or not by a
digital operator's monitor.
Page07: Velocity command monitor (VCMON)
Page09: Torque command monitor (TCMON)
Page13: Position command pulse frequency
monitor (FMON1)
■
If the value of a monitor is zero, input a command.
Check the servo motor is locked or not.
■
Check that the power line of a motor is connected.
Check if torque limit is input.
■
Since torque restrictions are inputted, a motor
cannot output the torque beyond the load torque.
■
Check of
“
Functions enabling condition settings
“
Enter deviation clear to check if process is
continued.
■
Stop the input of deviation clear.
✔
When performing the work for correction processing, be sure to intercept power supply.
■
Rotations of motor are unstable and less than the specified velocity command.
Investigation Assumed causes and corrective actions
Check if proportional control is entered.
■
Stop the input of proportional control.
■
Check of
“
Functions enabling condition settings
“
Check if torque limit is input.
■
Quit inputting torque limit.
■
Check of
“
Functions enabling condition settings
“
■
Motor rotates only once, and stops.
Investigation Assumed causes and corrective actions
Check motor power line.
■
The motor power line is not connected.
Check a setup of a combination motor.
■
Change the settings and turn ON the power again. Check a setup of encoder resolution. (System
parameter)
✔
When performing the work for correction processing, be sure to intercept power supply.