Novanta v40 User Manual page 92

RESETTING FAULTS
to do this, if a flow meter is not available, is to disconnect the cooling tubing from the chiller inlet (or the
drain) and run the cooling water for one minute into a five-gallon bucket; you should have close to one
gallon. If there is much less than one gallon, check the cooling path for kinked or pinched cooling tubes
or check the chiller for a clogged or dirty filter.
• Fan-cooled lasers – Cooling fans are not providing adequate airflow to the laser.
Check that all cooling fans are clear of debris and are providing an airflow rate of at least 140 CFM per
fan or at least 300 CFM if rear cooling the laser. To allow for proper airflow, cooling fans must have at
least 2.25" (57.2 mm) of unobstructed clearance between the outside edge of the cooling fan housing
and any mounting surface or enclosure.
Symptom:
• A shutter closed condition is indicated:
INT LED – Green
TMP LED – Green
RDY LED – Yellow
SHT LED – Off
LASE LED – Off
Possible Causes:
• The Shutter Switch (if equipped) is Closed.
If your v40 laser is equipped with a Shutter Switch, slide the switch to the Open position. The SHT
indicator will illuminate blue.
•
No voltage applied to Pin 10 (Shutter Open Request) on the User I/O connector.
Check to see that a positive or negative voltage (±5–24 VDC) is applied to Pin 10, Shutter Open Request,
with respect to Pin 11, Input Common, on the User I/O connector (refer to User I/O connections in the
"Technical Reference" chapter for details). If your system does not provide a Shutter Open Request
signal, connect the factory-supplied Quick Start Plug to the User I/O connector on the laser's rear panel
or wire your male DB-15 connector so that Pin 11 (Input Common) is jumpered to Pin 12 (Auxiliary DC
Power Ground) and Pin 10 (Shutter Open Request) is jumpered to Pin 4 (+5 VDC Auxiliary Power).
Symptom:
• Your OEM laser has quit lasing or lasing halted and then restarted. The LASE LED may be Off or
On depending on whether PWM Command signals are being applied, but no fault is indicated.
INT LED – Green
TMP LED – Green
RDY LED – Yellow
SHT LED – Blue
LASE LED – Off or On
Interlock Open – Open
Over Temperature – Open
Laser Ready – Closed
Shutter Open – Open
Laser Active – Open
Interlock Open – Open
Over Temperature – Open
Laser Ready – Closed
Shutter Open – Closed
Laser Active – Open or Closed
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