9
Rugby 300 SG 1.1.0en
Operation
Precise Alignment of the Axes
Under most conditions, the raised
alignment marks on the top of the
Rugby are adequate for alignment of
the axes. However, for more precise
alignment, use the following
procedure.
Objective:
• To establish Point A on the Y-axis
as a reference and take an
elevation reading.
• To dial grade into the X-axis and
then adjust the position of the laser
until the original elevation at Point A
is again found.
Procedure:
1 With 0.000% grade in both axes,
set up the Rugby directly over a
grade stake and rough align the Y-
axis to a second grade stake that
we will call Point A.
2 Take an elevation reading at Point
A using a Rod-Eye Receiver and a
survey rod.
3 Enter +5.000% grade into the X-
axis. When grade is entered in the
X-axis, the Y-axis acts like a hinge
or fulcrum.
4 With 5.000% in the X-axis, take a
second reading at Point A.
Alignment:
• If the second reading is equal to the
first reading, the X-axis is aligned
correctly.
• If the second reading is greater
than the first reading, rotate the
Rugby clockwise (to the right) until
the two readings are the same.
• If the second reading is less than
the first reading, rotate the Rugby
counter-clockwise (to the left) until
the two readings are the same.
