CHAPTER 9: MALFUNCTIONS
ALPHA ST 320
9-4
1.8 Alarm 8 – No Remnant
e 8 : N O R E M N A N T
Alarm8:
Description :
No bar is present when attempting to extract the bar. Possibly the bar was lost
when retracting from the lathe.
Solution :
Check burrs on the bar end.
Make sure that the lathe chuck opens completely.
Make sure the collet is not too loose/broken.
Check limit switch SQ4 (must turn on only when the vice is completely closed
without
bar)
1.9 Alarm 9 – Bar Stock Loading Error
e 9 : B A R S T O C K L O A D I N G
Alarm9:
E R R O R !
Description :
No bar present when attempting to insert bar.
Solution :
Check bar stock supply.
Check limit switch SQ4 (must turn on only when the vice is completely closed
without
bar)
1.10 Alarm 11 – Overfeeding
e 1 1 : O V E R F E E D I N G !
Alarm11:
Description :
Only applies to fix type lathes. Occurs when the feeding distance is bigger than
the defined part length (parameter F2).
Solution :
Check parameter F2.
Check the timing of the ‘chuck open’ interface signal (PLC input I3.1).
Check that turret stop tool is not broken.
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