4 Using 2D Guidance in theField
so that the laser catcher is vertical and receiving laser strikes. The laser light
bar indicates that strikes are being received. The laser catcher must be
reasonably steady in the laser plane. Once the system has detected valid
strikes, the Laser softkey appears.
Note – The Laser softkey is only displayed while the laser catcher is receiving
laser strikes. The system stores the position of the arm at the time valid strikes
were detected, and if strikes are lost, the arm position is retained for three
seconds (3s.). During this period the Laser softkey continues to be displayed
and can be pressed to accept the valid strike elevation.
2. Press Laser. The laser strike elevation is accepted as a reference.
3. Move the machine to the new working location, and rotate the cab into the
correct orientation for benching.
4. Again, raise the boom and accept the laser strike elevation, as described in
step 1 and step 2. The system is now benched against the original benchmark
elevation.
5. Repeat step 4 every time you move the machine.
Using Touch Point
ATTENTION — The Touch Point feature can be used with depth and slope models, however
the common point must be chosen so that the machine will be in its “as benched” orientation
when the Touch Point feature is used.
The Touch Point feature allows you to transfer the bench elevation simply by
touching the bucket on a point easily accessible from both your original position and
your new position. Using the Touch Point feature to transfer a bench elevation
requires no additional site infrastructure, and is an easy way to transfer the bench
elevation when working with depth models.
To use the Touch Point feature to transfer a benchmark elevation:
ATTENTION — Initiating Touch Point with the tilt bucket warning indicator displayed
may give poor results.
1. Before you move the machine from the location in which it was benched, touch
the bucket focus to any easily identifiable point that can be reached from both
your current, and your new, working positions. Press Touch Point. The Touch
Point dialog appears:
104 GCS900 GradeControl System for Excavators Operator's Manual
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