Operation Manual

Rugby 410/420 DG Operation8
3.2 Identification of the Axes
1. X+ Axis – When positive grade is entered in the X-axis, grade will
increase in this direction.
2. Y+ Axis – When positive grade is entered in the Y-axis, grade will
increase in this direction.
3. Front of Rugby – See also axis labeling on the side of the laser and
inside the top windows.
3.3 Slope - Percent of Grade
Slope The change in elevation per unit of measure (foot, meter, etc.)
Percent of Grade The change in elevation per 100 units of measure (feet, meters, etc.)
Calculating Percent
of Grade from the
Slope
3.4 Alignment of the Axes
When the desired grade is correctly set in the display, it is necessary to
align the X and Y axes to the jobsite.
Ensure the circular level vial is positioned near the center of the circle for
maximum self-leveling capability.
Ensure the Rugby is properly positioned over a control point.
As shown, the direction of the X-axis is seen from the front of the Rugby,
sighting over the top of the Rugby.
Rotate the Rugby slightly until the sights are aligned with your second
control point.
Once aligned, work can begin.
Slope = 0.0059
Conversion = 0.0059 x 100
Percent of Grade = 0.590%