Topcon MACHINE CONTROL AG System Five, Operator'S Manual

Page: 44 / 112

Control Box Usage
Topcon AG System Five Operator’s Manual
2-22
Valve Offset
The Valve Offset is the amount of electrical signal sent to the
valve which causes the hydraulic cylinder just to begin to move.
If the signal is too small, you will not have fine correction
control. Likewise, if the signal is too large, the cylinder will
move too much and overshoot on-grade.
1. Rotate the Grade Adjustment Knob to access the Valve
Offset menu.
2. Press the Auto button to select the Valve Offset (OFS)
menu (Figure 2-23).
Figure 2-23. Selecting Valve Offset Menu
This automatically activates the value screen for Raise. The
Raise Grade Correction Arrow illuminates, and the Control
Box begins to send a raise correction signal to the valve.
3. Turn the Grade Adjustment Knob counter clockwise,
decreasing the Valve Offset value until the hydraulic
cylinder is not moving. Then, slowly rotate the Grade
Adjustment Knob clockwise until the hydraulic cylinder
just begins to raise (Figure 2-24 on page 2-23).
Five System
AUTO
SURVEY
SET
(MENU)