COVER 1552965 - Caterpillar

Illustration 1 shows the relationship between the reference surface, in this case an existing curb line, and the benchmark elevation. Because the blade has been placed at the design elevation for benching, the reference elevation will be zero. In operation, the system will generate cut/fill values that will move the blade up and down to maintain a constant distance between the Sonic Tracer and the reference surface.3D Design Surfaces And Design Files
A 3D design surface is defined by a digital design surface file, or design. A design must contain a 3D design surface and can also contain background linework. The design surface contains vertical guidance information for a specific area. The design surface can be an irregular surface or a plane.Design surfaces are created in the office and saved onto a data card in the form of a design file. From the data card, the design file can be loaded directly to the Display. A data card can contain more than one design file. However, the AccuGrade System will only load one design at a time for display and guidance.Note: Once a data card is loaded into the Display, it is recommended that you do not remove the data card until the Display is turned off.Avoidance zones
A beeper alerts you as the machine approaches an avoidance zone.Avoidance zones are designated areas that you must keep away from. Avoidance zones can be sitewide, or avoidance zones can be specific to a particular design surface. AccuGrade System provides avoidance zone proximity detection at the blade tips. If the distance from the ripper to the blade has been configured, avoidance zone proximity detection is also given relative to the rippers, and is based on the width of the blade.Site avoidance zones
When the system is turned on, Site avoidance zones are automatically loaded from the data card. Then, the Site avoidance zones are displayed in the Plan View. Site avoidance zone proximity detection is provided until the Display is turned off. Note: If the Site avoidance zone cannot be loaded, the Display will be turned off. The data card with the avoidance zone must be removed from the Display in order to continue operation. Contact your site manager immediately.Design avoidance zones
Design avoidance zones are specific to a design surface. Design avoidance zones load from the data card as the design is loaded.Design avoidance zones are shown in the Plan View of the Display. Design avoidance zone proximity detection is provided while the design surface remains loaded.Note: If the Design avoidance zone cannot be loaded, the selected design will not be loaded. Select an alternative design surface in order to continue. Contact your site manager immediately.No avoidance zone guidance
While any of the following warning messages are displayed, avoidance zone guidance is not given:
"V. Low Accuracy"
"No GPS Data (Left)"
"No GPS Data (Right)"
"Old Position"
"No GPS Receiver Data"
"Invalid GPS" DataIf any of the above messages appear, the following warnings are activated:
the "NO AVOID " indicator appears on the guidance screens
the "Avoid. Dist." text item, if configured,