Mitsubishi FREQROL-SFJ - Page 91

Trouble III
I
Checkup
1 Remedy
Control equip-
ment fails from
time to time, or
error occurs in
oriented spindle
stop position.
(Condition is
restored when
the power is
turned off and
then on to re-
set.)
In this case, the compre-
hensive analysis must be
accomplished to deter-
mine the cause (load con-
dition,
operation mode,
etc.).
(1) Check if instantaneous
power failure occurred
or "UNDER VOLTAGE"
was displayed.
(2) Check if malfunction
(1) Check the power
suPPlY*
(2) Determine the
occurred in contol noise source and
circuit, due to large - install a surge
noise.
killer, etc.
The control equipment
Check and improve
is capable of with-
grounding method
standing noise (in
(particularly,
power supply) of 16OOV/
grounding of de-
1u.s.
tector).
(3) Check if overload oc-
(3) Check mechanisms
curred due to momentary
carefully.
change of load.
Check backlash
Check with particular between spindle
care if error occurred
and spindle en-
in oriented spindle
coder.
stop.
/’
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