Ditch Witch JT20 - Manual (Page 101)

Conduct a Bore - 100
JT20 Operator’s Manual
Use AutoCarve
CMW
®
Use AutoCarve
AutoCarve helps the operator change direction when thrust stalls in difficult soil conditions. AutoCarve
rotates the bit clockwise and counterclockwise to grind away soil, clearing a path to improve steering
through tough formations.
Movement Description
alternating clockwise and
counterclockwise rotation Enables the downhole tool to carve tough soil formations. Rotation speed
can be adjusted during autocarving.
NOTICE: To reduce the chance of unthreading pipe sections downhole,
rotation pressure is limited during counterclockwise rotation; however, the
operator should monitor carve operation and adjust thrust and rotation to
prevent unthreading.
carve window The range of alternating rotation.
thrust In autocarve mode, initial thrust speed is very slow or fully stopped. Adjust
speed anytime during carving.
pullback Thrust and rotation operate normally when joystick is pulled rearward.
High-speed pullback is not available in AutoCarve mode.