Troubleshooting; If You Have A Problem With The Controller; Remedies And Preventive Measures - Denso RC8 User Manual

4.2.1. If You Have a Problem with the Controller

When you contact us for a problem with the controller, please provide the following
information as exactly as possible.
Item
What has the problem?
When the problem occurred?
Why the problem occurred?
What problem occurred?
How often the problem occurred?

4.2.2. Remedies and Preventive Measures

If you faced a problem while using the controller, solve the problem referring to the following
table. If you still cannot solve the problem after doing so, please contact a local dealer or us.
No. Symptom
When turning on
controller provided
by customer, motor is
not excited or fingers
cannot return to their
original positions.
1
When inputting
special instructions,
controller cannot
work.
2
Abnormal sound and
vibration are
generating.
3

4.2. Troubleshooting

Model of electric gripper
Number of electric gripper
Date purchased
Service duration and operating condition
Conditions where the problem occurred
Detailed symptom of the problem
Frequency of occurrence of the problem
Possible cause
No power is supplied.
Alarm error may be
occurred.
Original position return
has not been completed.
Point movement is not
feasible.
Incorrect parameter
settings
Failure to tightly fix the
electric gripper
Problem with the guide
Electric gripper control
board failure
25
Details
Items checked
・Check the POW LED on
front panel of electric gripper
control board.
・Check wiring of 24V power
supply.
・Check power pressure
using a tester.
・Remove the power
connector to measure
resistance between the
power terminals
When ALM (LED lamp) on
the electric gripper control
board is on,
Check operating conditions
in electric gripper screen
and command.
Check the RPRG signal is
asserted.
Check settings of point data.
Check actuator type, model,
and parameter data
displayed in electric gripper
screen.
Fixing screws
Check foreign objects exist
in the guide.
Check any damage or
deformation on the guide.
Try to use another electric
gripper control board.
Remedy
・Replace the electric gripper
control board if there is no
problem with the power supply.
・If resistance is immeasurable
between the power terminals,
fuse may be blown. Replace
electric gripper control board.
Check the alarm details at the
robot controller error log.
Perform original position return.
Input correct point data.
Initialize parameters with electric
gripper screen.
Tighten screws for loose fixing
Replace guide.
Check to make sure that the
controller is not handled forcibly.
If it properly worked, replace
electric gripper control board.