Ditch Witch OnGrade - Manual (Page 32)

OnGrade Operator’s Manual
Conduct OnGrade Bore - 31
Set Up Laser Plane
CMW
Set Up Laser Plane
On Bore Path
The laser system is limited by line of sight. Setting up with that in mind can minimize how many times the
laser must be repositioned during the bore. Factors to consider include: bore slope and distance, surface
obstructions, and wind. Set up the laser and tripod in an area where they will not be bumped or disturbed
during operation. In windy conditions, set the tripod as low as possible. The laser can be set up directly on
the bore path or it can be offset to avoid line-of-site obstructions.
1. Set up tripod (5) past end pit (4) and inline with bore path, if possible.
2. Set laser plane slope. See laser operator’s manual and “Laser Plane” on page 38.
• Slope on laser is indicated in percent (%) and is the amount of rise or drop of the laser plane in feet
over a 100’ linear run.
• The slope of the laser plane can be adjusted from 0 to 25%.
• Set up laser plane so that it is not at eye
level for the grade pole/tracker operator.
3. Align laser unit so that alignment bumps (2)
on top of unit are parallel with the desired
bore path (1).
NOTICE: The Laser Reference AS2 is a Class II laser. The normal blink, or eye-aversion, reflex is
sufficient to prevent optical damage due to incidental viewing of a Class II laser. Do not look or stare into
laser beam.
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