Operation Manual

Rugby 410/420 DG 9Operation
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An optional sighting scope is also available.
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For very accurate alignment, refer to the steps for Precise Alignment of
the Axes.
3.5 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 eleva-
tion 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.