Refilling; Laser Path Alignment - Omtech PRO 2440 User Manual

If you ever notice your coolant is visibly dirty, prepare the necessary replacement water or antifreeze (see §6.3 below),
fully drain your antifreeze, and add a solution of clean soft water with citric acids or a mild detergent and bleach. (If
your chiller is already full of distilled water, you can add this cleaning solutions directly to the water already in your
system but do not add them to antifreeze.) Run the chiller for about ten minutes to clear the system, drain, and then
use clean soft water to process a few cycles of refilling and draining to clear any remaining residue. Once there is
clearly no debris or residue being rinsed out with the water, refill the tank and continue operation.

6.3 Refilling

NEVER touch or adjust your laser's water supply while it is still turned on or connected to power.
Your chiller should arrive with no prefilled coolant or antifreeze. It is recommended that you use OMTech laser-safe
antifreeze for safety. Always fill the chiller with distilled water or a custom-purpose laser-safe antifreeze. Using
deionized or tap water for any purpose but rinsing out cleansers (see §6.2.5 above) will gradually degrade the quality
of your engraver and may even cause dangerous mineral buildup within the cooling system. Never use generic
antifreeze for the same reason. Fill the tank to the green "NORMAL" level. ("FULL" is actually overfilled.)
It is recommended to change your coolant every three months to prevent any need for cleaning and rinsing the
system. Alternatively, if your coolant remains clear month after month, drain it at least once a year, being sure to run
the full cleaning routine described above to remove any microbial growth, corrosion, or impurities from the cooling
system.

6.4 Laser Path Alignment

A properly aligned laser beam is important for the overall efficiency of the machine and quality of its work. This
machine went through a complete beam alignment before shipping. When the engraver first arrives and about once
a week during normal operation, however, it is recommended that users confirm that alignment is still at acceptable
levels and that the mirrors and focus lens have not shifted due to the movement of the machine.
You will need to place a piece of tape at each stage of the laser path, marking it to confirm that that stage remains
correctly aligned. When it is not, you will use the laser tube's brackets or the screws on the back of the misaligned
mirror to correct the problem. Once the provided tape runs out, we recommend masking tape as it is easy to manage
and use.
Performing a beam alignment can expose the operator to small amounts of radiation if performed carelessly.
Follow these procedures correctly and always take caution when performing a beam alignment.
Perform a beam alignment at low power levels: 15% or less. Any higher percentage will cause the laser to
ignite the testing tape instead of marking it. Be sure that you set the Max. Power (not Min.) to 15%
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