Omtech SH-G1390 User Manual page 50

4 Installation
4.8.3 Water Shutoff
Because of the danger posed by an uncooled laser tube, this engraver also shuts off the laser
automatically when the water cooling system malfunctions.
After ensuring that the emergency stop button and cover protection both work, you should also
test that the water shutoff works properly before conducting any other work on your machine. Start
the water cooling system, place a piece of laserable scrap material on the workbed, close the cover,
and press Pulse to fire the laser. Release the button. Cut off the flow of water by crimping or tying
the two hoses. (Take care not to damage the hoses themselves in this procedure.) Attempt to fire
the laser again. If the laser fires, the automatic shutoff is not working and must be repaired before
the engraver can be used. Turn off the machine and contact customer service. If the laser does not
fire, the automatic shutoff is working fine; simply release the two hoses to begin circulating water
again and continue setting up your engraver.
4.8.4 Laser Path Calibration
Although our factory calibrates your entire system during assembly, it is possible for the laser tube,
the focus lens, and/or one or more of the mirrors to be jostled out of alignment during shipment.
As such, it is recommended that you perform an optical alignment test as part of setting up your
machine. See the Maintenance section below for step-by-step guidance.
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