Technical Notes

CATALOG

Regular Laser Maintenance Schedule

Periodic Laser Maintenance Schedule

REGULAR LASER MAINTENANCE SCHEDULE

The following maintenance must be performed regularly for trouble-free operation of the laser. However, be sure to replace components per the schedule in the Periodic Maintenance in the next section.

Item		Period	Instructions
1.	Laser Gas Pressure	Daily	Check that the primary regulator pressure is greater than 10 kgf/cm2. If not, replace the gas cylinder.
2.	Vacuum Pump Oil	Weekly	Confirm that the oil level is between the min and max levels with the machine in standby mode. If the oil level falls bellow the min level, replace the oil. Note that the oil must be replace every 6 months or 1500 hours of operation.
3.	Vacuum Pump Oil Leak	Weekly	Check that no oil has leaked on the frame of the vacuum pump, especially around the drain cock. If a leak is apparent, replace the exhaust filter as it is likely to be clogged. Note that the filter must be replaced every year or 3000 hours of operation.
4.	Turbine Blower Oil	Weekly	Confirm that the oil level is between the min and max levels with the machine in standby mode. If the oil level falls bellow the min level, replace the oil. Note that the oil must be replace every 4 months or 1,000 hours of operation
5.	Turbine Oil Leak	Weekly	Check that no oil has leaked on the frame of the vacuum pump, especially around the drain cock. If a leak is apparent, locate the source. Call service if the leak is coming from anywhere other than an open drain cock.
6.	Laser Output Power	Weekly	If the power level inside the laser resonator falls bellow acceptable levels, a warning message number 4085[685] is displayed. Clean resonator optics or replace them as necessary.
7.	Chiller Water	Weekly	Check the water quality. If the color changes considerably, drain and refill the chiller with clean distilled water and additive. Note that the water and the additive must be replace every 1 year of operation. If water additive is not used, the distilled water must be replace every 2 months.

PERIODIC LASER MAINTENANCE SCHEDULE

The table below lists the periodic maintenance of the laser resonator components. The operational hours are indicated on the hour meter on the resonator. When two periods are given (ie: 6 months or 1500 hours) use the lower value.

Item		Period
1.	Clean Output Coupler Mirror	Every 6 months, or when "4085 Mirror is Dirty" alarm is displayed , or if the laser beam mode is distorted.
2.	Clean Rear Mirror	Every 6 months, or when "4085 Mirror is Dirty" alarm is displayed , or if the laser beam mode is distorted.
3.	Clean Fold Mirrors	Every 6 months, or when "4085 Mirror is Dirty" alarm is displayed.
4.	Clean Zero-shift Mirror	Every 2 months, or power decreases (depending on situation).
5.	Replace Output Coupler Mirror	Every year or if the laser beam mode is distorted.
6.	Replace Rear Mirror	Every year, or when "4085 Mirror is Dirty" alarm is displayed.
7.	Replace Fold Mirrors	Every year, or when "4085 Mirror is Dirty" alarm is displayed.
8.	Replace Zero-shift Mirror	Every year, or power decreases (depending on situation).
9.	Replace Vacuum Pump Oil	Every 6 months or 1,500 hours
10.	Replace Vacuum Pump Filters	Every year or 3,000 hours
11.	Overhaul Vacuum Pump	Every 3 years or 10,000 hours
12.	Change Turbine Blower Oil	Every 4 months or 1,000 hours
13.	Overall Turbine Blower	Every 4 years or 12,000 hours
14.	Change Exhaust Filter	Every 2 years or 1,500 hours
15.	Replace Gas Pressure Control Filter	Every 2 years or when contaminated or with control problems
16.	Replace Laser Tube O-rings	Every 2 years or when internal leak apparent
17.	Chiller Water	Every year if additive used, or every 2 months if additive not used or when water quality deteriorates.
18.	Clean Water Tubes	Every year
19.	Warning Beacon Light	Every 3,000 hours or when faulty