Spindle alarms
4.2.12 ALARMS
3051 TO 3054 (EXCESSIVE POSITION LAG)
Excessive position lag results when the lag of machine
to command value exceeds parameter
pm1351
to pm3054.
Table 4.14
Alarms 3051 to 3054 (Excessive Position Lag : spindle)
Cause of Trouble
Motor load is too large
and movement
commanl
is too small.
e.g.
● Excessive drilling
Ioal
● Machine requires
lubricant.
● Program error causes
tool/work contact.
Torque is not applied.
D/A circuit failure
(output continues )
Failure of spindle
controller (speed com-
mand continues)
Wiring failure
Incorrect setting of PG
magnification
Too low setting of Kp
(position loop gain)
causes excessive
positioI
lag. ---
Check Method
‘
Observe motor current or torque
monitor if an alarm occurs during idle
running@/~
direction (forward/
reverse) at log or rapid mode after
turning ON the power.
I
Check oil film on slide surface of
machine and check oil level in tank.
*
Check torque limit signal.
‘
Check torque monitor and motor
current. (For details, refer to the
spindle controller manual. )
With
the check connector CN3D of
model JANCD-FC31O (or
FC260)
board,
:heck that output voltage changes
~ccording to command. A3 (O V)
]etween A5 and A3 of
1st
spindle and
]etween Al and A3 of 2nd spindle.
lefer
to the instruction manual of
;pindle drive.
3efer to Section 12 of YASNAC i80
3onnecting Manual (TOE -C843-11.5).
Determine correct PG magnification
‘rem PG pulse count, gear ratio,
ball-
ype
screw pitch and compare it with
]arameter
pm1053
to
pm1056.
Solution
[f the cause is in the
machine, correct the
trouble and restart
operation.
● Correct torque
limitation.
● Replace spindle drive.
● Replace the spindle
motor.
Replace model
JANCD-
FC310
(or
FC260) board.
Replace the spindle
controller unit.
Refer to Section
12
of
YASNAC i80 Connecting
Manual
(TOE-C843-11.5).
Set correct PG
magnification.
If the setting is much
smaller than the standard
value set by machine
manufacturer, enlarge
parameter
pm1417
(lst-
spindle axis),
pm1437
(2nd-
spindle axis), pm1457
(3rd-
spindle axis) and pm1477
(4th-spindle axis). See
Section 5 for Kp adjustment
method. For details, contact
machine manufacturer.
95
a
A
To Next Page
Loading...