Synrad Pulstar P100 Series, Руководство оператора

Страница: 96 / 110

maintenance/
troubleshooting
4
18 Synrad Pulstar p100 operator’s manual
Troubleshooting
Note: OEM p100 lasers can be operated at coolant temperatures up to 30 °C (86 °F) to reduce problems
associated with condensation; however, this may result in decreased laser performance and/or
reduced laser lifetime.
If water temperature is OK, verify that the coolant flow is between 5.7–7.6 lpm (1.5–2.0 GPM). The
simplest way 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 60 seconds into a five-gallon bucket; you should have
close to two gallons of water. If there is much less than two gallons of coolant, check the cooling path for
kinked or pinched cooling tubes or check the chiller for a clogged or dirty filter.
On OEM p100 lasers, the over-temperature fault (indicated by the TMP indicator turning red) is latched.
This means that if an over-temperature condition occurs the TMP indicator will turn red, the Fault
Detected output will Close, the RDY light goes out, the Laser Ready output will Open, and lasing is dis-
abled. Because of its latched condition, the TMP indicator will remain red even after the laser has cooled
sufficiently to begin operation.
To reset an over-temperature fault, lower coolant temperature below 30 °C and then cycle DC power
(remove DC power, wait 30 seconds, reapply DC power). When the
RDY indicator illuminates, lasing is
enabled provided the SHT indicator is illuminated blue. If the TMP indicator remains red after cycling
power, continue to flow cooling water through the laser for a few more minutes and/or verify the coolant
flow rate and then cycle DC power again.
Symptom:
■
The SHT LED is flashing continuously because of a No-Strike condition as indicated by the follow-
ing status LED and I/O states:
INT LED – Green Interlock Open – Open
TMP LED – Green Fault Detected – Closed
RDY LED – Yellow Laser Ready – Closed
SHT LED – Blue (Flashing) Shutter Open – Closed
LASE LED – Off or Red Laser Active – Open or Closed
Possible Causes:
■ A No-Strike condition has occurred, possibly due to cold environmental conditions that may pre-
vent the gas from breaking down into a plasma state. If this occurs while a PWM signal is applied,
laser output is limited to a PWM duty cycle of approximately 5% (at 5 kHz).
Apply tickle pulses or a PWM Command signal (< 5% duty cycle) for 30 to 60 seconds. When the gas
breaks down into a plasma state, the laser will recover and begin lasing
immediately at the commanded
power level without cycling DC power.
Symptom:
■ The SHT LED is repeating a two-blink error code and the following status LED and I/O states exist: