HTS-420R Maintenance Manual
15
9. EDM laser beam alignment
Setup the instrument and set a crosshair over 30 m away from it. Level the instrument and adjust the
telescope to make both crosshair coincide. Turn on the EDM laser to check if the laser spot is cast right on
the center of target crosshair. If it is not, open the top telescope and continue the following steps to align
the laser beam.
Up - down adjustment:
As shown in the picture below, twist the screw 1 anticlockwise to push the laser spot up, or twist it
clockwise to push the laser spot down, until the laser is right on the horizontal line.
Left - right adjustment:
Twist the screw 2 anticlockwise to push the laser spot to the left, or twist it clockwise to push the laser
spot to the right, until the laser is spot right in the center.
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