D20x22 Series II Navigator HDD Overview 30-47
Drilling Modes Overview
MANUAL MODE
In the default Manual mode, thrust and rotation pressures are determined by the
drilling conditions and are limited by the system pressure (3000 psi/207 bar). No
display lights are ON.
R.A.T.T. MODE
To switch from Normal Drill mode to R.A.T.T. mode, press R.A.T.T. Mode Key (1) once
to activate Oscillation mode. Lights (3), (4), & (5) will turn ON, indicating that
Oscillation mode and pressure limiters are ON.
•Rotation pressure is limited to a preset value and is not adjustable by the
operator. Thrust pressure limits may be adjusted to 3300 psi (227 bar) with the
Speed/Pressure Trim Switch (6).
•The display will show oscillation in degrees. This can be adjusted using the
Oscillation Adjustment Keys (7).
Press R.A.T.T. Mode Key (1) a second time to activate Straight Drilling mode. Light
(3) will turn OFF and R.A.T.T. icon will be displayed.
Pressing R.A.T.T. Mode Key (1) again will toggle between Oscillation and Straight
Drilling modes.
NOTICE: Never operate with rotation limiter OFF and the R.A.T.T. tool attached. The
tool will be damaged if rotation torque exceeds the capacity of the tool.
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