D20x22 Series II Navigator HDD
Machine Controls 20-21
(4)
AutoDrill Selector Switch
Toggle . . . . . . . . . . . . . . . . . . . . . Constant Thrust/Pullback Speed
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SPEED shown on display
Toggle second time . . . . . . . . Constant Thrust/Pullback Pressure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(default in R.A.T.T. mode)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . THRUST shown on display
Toggle third time . . . . . . . . . . . . . . . .Constant Rotation Pressure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ROTATE shown on display
(5)
Speed/Pressure Trim Switch
Clockwise . . . . . . . . . . . . . . . . . . . . . . . . . increase speed/pressure
Counterclockwise . . . . . . . . . . . . . . . . . . . decrease speed/pressure
Hold, either direction. . . . . . . . . . .continuously ramp up or down
First toggle
will display mode of operation code and set point
value.
For example:
ASPD25 . . . . . . . . . . . auto speed @ 25% of maximum pump flow
T-1900 . . . . . . . . . . . . . . . . . . . . . . . . . .thrust pressure @ 1900 psi
R-2050. . . . . . . . . . . . . . . . . . . . . . . . rotation pressure @ 2050 psi
Second toggle
will increase or decrease the value displayed on the
screen. Holding the toggle in either direction will ramp up or down
the rate of change of the value displayed.
5
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