Using Elevation Offsets

Often, it is not possible to reach the design surface in a single pass, because the elevation of the current surface is too far away from the design surface.

The system lets you apply elevation offsets to the design to create target surfaces that are achievable in a single pass.

You can also use a working surface offset to shift the design surface to a known distance above or below the design surface, for example a subgrade at a known distance below the finished level design.

When using a working surface offset, elevation offsets are applied away from the working surface so you can work the offset down to zero over several passes to reach subgrade for example.

Accessing the Elevation Offset screen

Perform one of the following actions to access the Elevation Offset screen:

• Open the Work Settings menu.

• Touch and hold the elevation offset field in the guidance bar.

The appearance of the offset icons on the guidance bar depends on:

• The direction of the working surface offset
• The direction of the elevation offset
• The type of offset – vertical or perpendicular

The Elevation Offset screen

Use the Elevation Offset screen to:

• Apply or edit an elevation offset

• Select or edit an existing Elevation Offset memory

• Apply or edit a Working Surface offset

You can also access the Offset Memories screen, which you can use to create elevation offset values that the system saves and can be selected for later use.

When you work in Design mode, you can use elevation offsets to do the following tasks:

• Add an offset to the design surface.
• Select an offset from the offset memories.

• Apply a new working surface that is a offset above or below the design surface that you want to achieve at the end of the current task (this is done under Advanced Options).

  For example, create a working surface that is 300 mm (1 ft) below the design and bulk shift to that working surface. Then, add material back in offset increments of 50 mm (2 in) each to build back up to the design surface.

• Choose the offset direction (vertical or perpendicular) that applies to both the elevation offset and any working surface offset.

Applying an elevation offset

Use either of the following methods:

• Access the Elevation Offset screen, enter the following data and then tap Apply:
  • Offset value
  • Focus for guidance
  • Offset direction (optional item under Advanced Options):
    • Vertical - typically for a known elevation
    • Perpendicular - typically for a known thickness, particularly on a sloping surface
• Open the work screen and tap the elevation offset field in the guidance bar to cycle through the saved offset memories.

Creating, editing or deleting memories

In the Elevation Offset screen:

• Tap the Save button to save an entered offset value as a memory.

• Tap the Memories icon on the right‑hand side of the memory to open the Offset Memories screen.

In the Offset Memories screen:

• Tap the overflow icon to edit or delete a memory.

• Tap the Create button to create a new memory.

• Touch and hold on a memory to select multiple memories for deletion.