2D system measurements 9
9.8.2 L–M
To take the measurement:
1. Attach a string line from the center of the stick pin B to the center of the
bucket pin G.
2. Align one side of a framing square with the string line, and point the other side
towards point L.
3. Use the ruler on the square to measure from L to the string line M.
The following diagrams show positive and negative L–M measurements:
Figure 9.1 B–L positive; L–M positive
GCS900 Grade Control System for Excavators Installation Manual 95
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