Topcon MACHINE CONTROL AG System Five - Page 7

Table of Contents
P/N 7010-0369 www.topconpositioning.com
iii
Chapter 3
Laser Setup ........................................................... 3-1
Laser Placement ............................................................... 3-2
Small Project Laser Transmitter Placement .............. 3-3
Large Project Laser Transmitter Placement .............. 3-4
Laser Transmitter Calibration .......................................... 3-5
Laser Axis Alignment ...................................................... 3-7
Automatic Alignment ................................................ 3-7
Manual Alignment .................................................... 3-8
Conditions Affecting the Laser Transmitter .................... 3-11
Laser Drift ................................................................. 3-12
Atmospheric Laser Bending ...................................... 3-13
Setting Grade Reference Points ....................................... 3-14
Other Factors Affecting Quality ...................................... 3-16
Wind .......................................................................... 3-16
Dust ........................................................................... 3-16
Fog ............................................................................. 3-17
Curvature of the Earth ............................................... 3-17
Laser Accuracy and Repeatability ................................... 3-18
Chapter 4
Surveying .............................................................. 4-1
Overview .......................................................................... 4-1
Survey Preparation ........................................................... 4-2
Laser Transmitter Setup ............................................ 4-3
Initial Elevation Reference Selection ........................ 4-4
Perimeter Survey ............................................................. 4-5
Calculating the Average Fall ..................................... 4-7
Calculating the Slopes ............................................... 4-8
Irregularly Shaped Fields .......................................... 4-8
Steeply Sloped Fields ................................................ 4-9
Serpentine Survey ............................................................ 4-10