The most likely troubles or failures with FR-SFJ can be large-
ly divided into the following two groups:
r
Control equipment does not work satisfactori-
ly when it is turned on for the first time (Ij.
Trouble A
I-
Control equipment comes into a standstill
abruptly
(II).
I
Control equipment fails from time to time,
or error occurs in oriented spindle stop po-
sition, or "alarm" lamp lights
(II).
Trouble B
*Trouble
with
-7
Failure in main circuit
control
equip-
ment
Failure in control circuit
.Trouble
with
detector
Failure in speed detect
encoder
Failure in multi-point
oriented spindle stop en-
coder
Failure in l-point oriented
spindle stop magnesensor
Failure in parameter data transfer from NC
'Trouble with power supply
,Trouble
with motor
Other troubles (mismatching input signal con-
ditions,
cable disconnection, etc.)
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85
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