Denso RC8 User Manual page 30

No. Symptom
Since the fingers
made a bump at
stroke end while
4 returning to their
original positions, the
machine stops due to
occurrence of alarm.
Misalignment of
original position
occurs.
5
Electric gripper
speed is too fast or
too slow.
6
Impossible to move
7 to the electric gripper
screen
Impossible to
operate the electric
gripper screen
8
When execute the
electric gripper
command, the error
"Invalid index" is
issued
9
Possible cause
Motor failure
Inconsistent settings
Incorrect parameter
settings or failure
Damaged ball screws
( FS/FT type)
Connection failure of
pulley
( FS/FT type)
Some teeth of belt are
missing. ( FS/FT type)
Malfunction caused by
noise.
Incorrect the parameter
setting values.
Change the speed
setting.
License registration has
not been done yet.
The electric gripper
control board does not
correspond to the
specified electric gripper
number.
The electric gripper is
not activated
The electric gripper
control board does not
correspond to the
specified electric gripper
number.
The electric gripper of
the specified gripper
number is not activated
License registration has
not been done yet.
26
Items checked
Try to use another electric
gripper.
Check the actuator type and
gripper model displayed in
electric gripper screen.
Check the parameters with
electric gripper screen.
Check the ball screws.
Check the fixing parts.
Movement speed was
increased too much.
Check how much the belt is
bent.
・Check the ground terminal
on electric gripper control
board is utilized for ground.
See "Electric gripper
connection cable FG
connection", "Power supply
connection".
・Check for the connection
with cable connectors.
・Check if there are a
welding machine, electric
discharge machine, etc.
near the controller.
・Check if the relay which
turns on/off a huge motor
exists near electric gripper
control board.
Check the actuator type and
gripper model displayed in
electric gripper display.
Check speed parameter
Confirm whether the license
registration has completed
Confirm whether the electric
gripper control board
corresponds to the specified
gripper number and whether
they connect properly.
Confirm whether the electric
gripper is activated
Confirm whether the electric
gripper control board
corresponds to the specified
gripper number and whether
they connect properly.
Confirm whether the electric
gripper of the specified
gripper number is activated
Confirm whether license
registration has completed
Remedy
If it properly worked, replace
electric gripper.
Initialize the parameters with the
electric gripper screen.
Initialize parameters with the
electric gripper screen.
Replace the ball screw.
Tighten for loose fixing.
Modify the parameters.
Adjust the belt.
・Keep controller as far away
from noise source as possible.
・Consider installation of a noise
filter and insulated transformer.
・Attach a noise killer to relay
contact.
・Keep the motor and encoder
cable away from the power
cable.
Initialize the parameters with
electric gripper display.
Modify parameters.
Register the license. If the
license is not provided, please
contact to Denso Wave.
Connect appropriate electric
gripper control board which
corresponds to the specified
gripper number.
Activate the electric gripper of
the specified gripper number.
For the electric gripper activation
process, see "Operation guide".
Connect appropriate electric
gripper control board which
corresponds to the specified
gripper number.
Activate the electric gripper of
the specified gripper number.
For the electric gripper activation
process, see "Operation guide".
Register the license. If the
license is not provided, please
contact to Denso Wave.