Using theControl Box and Lightbars 2
When the cutting edge is within the on-grade or on-line tolerance, only the central
green LED is lit. If any LED, other than a green LED is lit, then the cutting edge is
off grade or off line.
Excavator lightbar behavior depends on the system installed. The following sections
describe how Depth and Slope and 3D guidance information is displayed using
lightbars.
2.6.3 2D excavator lightbar behavior
1
Bucket guidance. Green and three amber
LED lit. Lower bucket.
2
Laser strike guidance. No LEDs lit. No
laser strike.
Figure 2.4 Using a 2D excavator’s lightbars
The left lightbar displays cut/fill information. The cut/fill information is relative to
the guidance surface under the bucket.
The right lightbar behaves in the following way when the laser catcher receives
laser strikes:
l Green LED lit – laser strike detected in the center of the laser catcher window.
l Green and two amber LEDs lit – laser strike detected close to the center of the
laser catcher window.
l Green and three amber LEDs lit – laser strike detected far from the center of
the laser catcher window.
l No LEDs lit. No laser strike detected.
To set lightbar brightness, see 3.3.7 Lightbar brightness.
GCS900 Grade Control System for Excavators Operator's Manual 41
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