Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 28)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-7
(6) Alarm Number 3001 (Control Not Ready)
The PC NC executes self-diagnosis after power ON. This alarm
occurs when the positioning error checked during this self-diag-
nosis exceeds the values set for parameters pm 1321 (1st axis) to
pm1325 (5th axis).
(7) Alarm Numbers 3041 to 3048 (Excessive Follow-up Error)
If the follow-up error between the command values and the actual
position values exceeds 120% of the error in rapid traverse
(100%) operation, this alarm occurs. Check the values set for
parameters pm1671 to pm1675, pm1681 to pm1685 and contact a
Yaskawa customer service representative.
(8) Alarm Number 3051 (Excessive Follow-up Error: Spindle)
If the follow-up error between the command values and the actual
position values exceeds the value set for parameter pm1351, this
alarm occurs. Check the values set for parameter pm1351 and
contact a Yaskawa customer service representative.
(9) Alarm Numbers 3061 to 3068 (Overload)
Table 4.6: Troubleshooting - Alarm Number 3001 (Control Not Ready)
Cause Check Item Countermeasures
Machine axes have moved. Select the error pulse display screen
from the present position display
screen in the common process and
check the error pulse value.
Contact a Yaskawa customer
service representative.
PG signal remains output. PG or AC servo must be
changed. Contact a Yaskawa
customer service representative.
Table 4.7: Troubleshooting - Alarm Numbers 3061 ~ 3068 (Overload)
Cause Check Item Countermeasures
Cutting conditions Determine whether the alarm occurred during
machining. Turn OFF the power and
allow the servomotor to cool.
Then change to lighter
machining conditions and
restart the operation.
Guideways are not lubri-
cated properly, causing
heavy axis movements. Inspect the guideways to determine whether
they are lubricated properly. Contact the machine
tool builder, or a Yaskawa
customer service representa-
tive.