Repositioning during bore, Ongrade operator’s manual – Ditch Witch OnGrade User Manual
Page 34
OnGrade Operator’s Manual
Conduct OnGrade Bore - 33
Set Up Laser Plane
CMW
Repositioning During Bore
1.
Set up laser in front of obstruction (laser position 1).
2.
When it is time to reposition the laser, use laser receiver to detect laser plane and make a mark on a
reference point (telephone pole or other stable object).
3.
Move up the reference point a known distance (A) that will allow obstruction to be cleared.
4.
Set up laser on other side of obstruction (laser position 2) and take readings until it is time to reposition
the laser again.
5.
Use laser receiver detect laser plane and make a mark on a reference point past the end pit.
6.
Make a second mark that is a known distance (B) below the laser plane.
7.
Set up laser (laser position 3) and finish taking readings.
A
B
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2
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