THIRD MIRROR ALIGNMENT.
After ensuring that the laser is properly aligned between the 2nd and 3rd
mirrors, check the alignment between the 3rd mirror and the table. First,
remove the air assist hose from the laser head. Then, place a piece of tape
on the bottom of the laser head and press it firmly against the nozzle. This
will leave a ring mark that can help you check the accuracy. Repeat the
steps in 5.4.1. If the laser is not centered through the laser head, adjust the
set screw of the third mirror accordingly as shown in 5.4.2. Test again until
the beams are properly aligned, then retighten the nuts on the screws.
INSTALL THE LASER TUBE.
Schematic diagram of laser tube installation:
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