Chapter 1: Alarms
QUICK SIX
1-15
A025 – Servo Motor Positioning Error
FRONT TOP MEASURING S
SIGNAL SQ1 MISSING!
POSSIBLE CAUSES:
-FRONT STOPPER DID
NOT MOVE UP
-SIGNAL SWITCH SQ1
DEFECTIVE OR
MIS-ADJUSTED
SERVO MOTOR
POSITIONING
FOLLOWING ERROR!
DURING SEQUENCE
NUMBER [@@]
POSSIBLE CAUSE:
MECHANICAL OBSTACLE
PREVENTS BAR STOCK
TO FEED OUT
A025
Description:
The Servo Motor Following Error alarm occurs due to a mechanical obstacle preventing the bar stock from feeding out. The torque on
the servo motor will build up when the obstacle prohibits the stock from moving, once the torque reaches a certain limit the PLC
instructs the servo amplifier to quit pushing and this alarm message appears on the remote control station.
Solution:
Seq. # Solution
##
Alarm needs to be cleared. Press the STOP key on the remote control station to clear the message and reset the
alarm.
• Check for any mechanical obstacles that the bar stock may be hitting. Remove obstacle if this is the case.
• Check the bar stock diameter. Make sure that the actual diameter is the same as the value entered in for the
corresponding parameter in the Part Setup menu.
• Check the alignment between the bar feeder and the lathe. The lathe or the bar feeder may have shifted over
a long period if either is not lagged to the floor securely.
If the problem persists please contact an LNS agency for further information.
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