IAI EC-ST15, Instruction Manual

Page: 141 / 210

7.4 Troubleshooting by alarm groups
7-11
7.
Troubleshooting
Alarm group A: Overload alarm
Moving parts of ELECYLINDER stopped abnormally while moving to the target position.
No. Cause Countermeasure
1 Operation may not be possible due to contact with or
snagging on external obstacles. Remove any external obstacles or other external
loads.
2 The ELECYLINDER may be being used under
conditions exceeding the specifications described in
the catalog. Check the specification values such as payload,
acceleration/deceleration and speed, and adjust
them appropriately.
3 Causes may include depletion of grease, brake
failure and motor failure. Depletion of grease on the ball screw / guide inside
ELECYLINDER could be considered.
Supply grease to ELECYLINDER.
Remove the motor and check the sliding movement
of the ELECYLINDER body.
If there is no abnormality in the sliding motion, there
is a possibility of motor or brake failure.
Replacement of the motor is recommended.
4 The base may have been distorted when mounting
the ELECYLINDER, increasing the sliding resistance
of the guide. The ELECYLINDER mounting surface should be a
machined surface or a plane with similar accuracy,
with flatness within 0.05mm/m.
Refer to the recommended tightening torque of the bolts
for base fixing in "2.3 Installation method".
5 The peak power capacity of the 24V power supply is
less than 4.2A. Use a power supply with peak current of 4.2 A or
higher (per axis).
6 If the diameter of the power wire is less than AWG18
(thin), the peak current may not flow due to increased
resistance value or contact failure at the connection
terminal. Make sure that the wiring for power supply use is
AWG18 and that there is no looseness, contact
failure, disconnection or the like at the connection
terminal/connector etc.
7 The deceleration distance was insufficient and the
calculation result of the arrival position exceeded the
operation range of the ELECYLINDER due to the
"next movement command" being issued too soon
during operation with "Smooth accel/decel setting"
enabled. Adjust the timing of the "next movement command"
so that the command will be given after the first
movement is completed.
8 24V power was turned ON while the moving parts of
the ELECYLINDER were immobilized or pressed
against the mechanical stopper. Resolve the state of immobilization.
If the unit is pressed against the mechanical stopper,
move it at least 5mm away, then turn on the power
again.