Ditch Witch JT20 - Manual (Page 92)

JT20 Operator’s Manual
Conduct a Bore - 91
Operate Carriage Control
CMW
®
Operate Carriage Control
Drilling
During normal drilling operation, the thrust/rotation joystick controls both
operations and allows any combination of the two based on the position of
the joystick:
• Push joystick toward 1A for forward thrust with clockwise rotation.
• Push joystick toward 2A for forward thrust with counterclockwise rotation.
• Pull joystick toward 2B for reverse thrust, with counterclockwise rotation.
• Pull joystick toward 1B reverse thrust, with clockwise rotation.
Coordinated Make-up
During pipe change operations when front wrench is closed and carriage is
on front or rear home, the thrust/rotation joystick controls the speed and
direction of rotation. Thrust speed and direction are set by the machine
controller to follow the speed and direction of the rotation. If needed, thrust
speed can be increased or decreased slightly by moving the control toward or
against the direction of thrust travel. If joystick remains in neutral for rotation,
then thrust is controlled normally.
Push joystick toward 1A for clockwise rotation (machine controlled makeup).
Push joystick toward 2B for counterclockwise rotation (machine controlled breakout).
NOTICE: Counterclockwise rotation can unthread pipe in the ground.
IMPORTANT:
• If the thrust/rotation joystick is moved straight forward or backward so there is no rotation, thrust is
controlled by the operator.
• While rotating the operator can adjust thrust speed slightly with joystick.