Yaskawa i80M Maintenance Manual - Manual (Page 79)

4.1 TROUBLE IDENTIFICATION
Try to fully analyze the circumstances in which trouble
occurs. This is necessary for identifying the trouble
and/or for assisting YASNAC service personnel who may
be called in to correct the trouble.
Verifying the
following points will minimize the
system.
4.1.1 RECOGNITION OF TROUBLE STATUS
( 3 )
( 4 )
( 5 )
( 6 )
What operation will cause
the trouble? ( Is other oper-
ation performed normally?)
When does the trouble occur:
every time or frequently?
Was there any external
disturbance such as power
i n t e r r u p t i o n o r l i g h t n i n g
when the trouble occurred?
Did it occur during or after
operation of mode switches
such as EDIT or memory,
or process keys such as
‘ r ‘ r ‘ o f t ‘ e y s
on CRT panel?
Ensure the following points
if the trouble occurred as
related to feed and/or
spindle operation:
down time
-
your
T r o u b l e
H o w ? How often ?
W h e n ?
●
Check of LED on the drive unit
●
ON/OFF check of circuit breaker
●
Time of trouble occurrence such as
at power ON.
at acceleration.
L i g h t n i n g ?
at deceleration.
at steady-state running.
Does it depend on the part program?
Record the machining program,
offset, work coordinate system shift
amount or coordinate system set
value if it depends on the part
program.
71