Yaskawa i80M Maintenance Manual - Manual (Page 103)

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 to pm3054.
Table 4.14 Alarms 3051 to 3054 (Excessive Position Lag : spindle)
Cause of Trouble
Motor load is too large
and movement
is too small.
e.g.
●
Excessive drilling
●
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
lag. ---
Check Method
Observe motor current or torque
monitor if an alarm occurs during idle
direction (forward/
reverse) at log or rapid mode after
turning ON the power.
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. )
the check connector CN3D of
JANCD-FC31O (or board,
that output voltage changes
to command. A3 (O V)
A5 and A3 of spindle and
Al and A3 of 2nd spindle.
to the instruction manual of
drive.
to Section 12 of YASNAC i80
Manual (TOE
Determine correct PG magnification
‘rem PG pulse count, gear ratio,
screw pitch and compare it with
to
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
board.
Replace the spindle
controller unit.
Refer to Section of
YASNAC i80 Connecting
Manual
Set correct PG
magnification.
If the setting is much
smaller than the standard
value set by machine
manufacturer, enlarge
parameter
spindle axis),
spindle axis), pm1457
spindle axis) and pm1477
(4th-spindle axis). See
Section 5 for Kp adjustment
method. For details, contact
machine manufacturer.
9 5
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