
B–70115EN/03
6. TROUBLESHOOTING
149
Anomaly of assist gas (Refer to DGN = G221/bit 7 [145/bit7]
When starting machining, the NC monitors for a ready signal from the
assist gas supply unit in the machine. If this signal is not sent normally,
the NC issues this alarm.
Check the DGN data and the signal from the assist gas supply unit.
If the signal is abnormal, check the assist gas supply unit.
This alarm is issued if an α value other than 0 to 3 or a β value other
than 1 to 7 is selected for G32PαQβ during program execution.
Shortage of cooling water (Refer to DGN = 961/bit 1 [840/bit 1])
This alarm appears when the water shortage takes place.
If the 4070 chiller abnormality alarm also appears, the chiller is
defective. Check the chiller unit.
No. Cause of trouble Solution
1 Shortage of cooling water 1 The capacity of the chiller unit is insuffi-
cient, or the water flow rate is reduced
due to a clogged pipe. Use a chiller unit
having sufficient capacity, or clean the
piping.
2 Check whether the cooling water is dis-
tributed normally throughout between
the external optical system and the laser
oscillator. Ensure that cooling water is
supplied to the laser oscillator at the
specified flow rate. This alarm is issued
if cooling water is supplied at a flow rate
even slightly below the specified value.
2 Anomaly of connecting
cables
Check the connection of each cable.
3 Anomaly of water flow
rate sensor
If this alarm is issued even when the speci-
fied flow rate is satisfied, clean or replace
the water flow rate sensor. When the rate is
lower than rated flow, this alarm occurs.
Alarm No. 4071 [671]
Alarm No. 4072 [672]