Ditch Witch JT60AT - Manual (Page 109)

JT60/JT60 All Terrain Operator’s Manual
Conduct a Bore - 109
Use AutoCarve
Operation
1. Position downhole tool for carving. Rotate the toolhead to the desired position.
2. Turn on AutoCarve mode. Press top of AutoCarve switch.
3. Begin carving. Move thrust control to full forward and then release to neutral to start alternating
rotation. Adjust thrust and rotation speed as needed during carving.
4. Adjust thrust speed. Press and hold the Resume switch until carriage begins to move forward, then
release switch. Press Resume repeatedly to increase thrust speed to desired setting. To reduce thrust
speed, press Set switch.
5. Set carve window. Use the Carve Window Potentiometer to set the desired range of travel. Adjust as
needed while carving.
6. Adjust rotation speed. Move rotation control to full clockwise rotation. Press the Set/Resume switch
to decrease/increase rotation speed. Adjust as needed while carving.
7. Pause carving. Move thrust control back from neutral.
8. Resume carving. Move thrust control to full forward and then release to neutral to start alternating
rotation.
9. Ream a newly carved section. After carving a few inches, press and hold the 2-Speed button and
move rotation control to full clockwise rotation for maximum rotation. When tool rotates freely, reduce
rotation speed and stop at desired carve position. Release 2-Speed button and resume carving.
10. Exit carve mode. Press bottom of AutoCarve switch. Carriage movement and rotation will stop.
Continue normal drilling.
Note: For quicker setup during a long bore, autocarve thrust and rotation settings are retained until the
unit is shut down.
IMPORTANT:
• 2-speed thrust is not allowed in AutoCarve mode.
• AutoCarve mode is disabled while front wrench is closed.
• Adding or removing pipe does not affect AutoCarve position.
IMPORTANT: For finer adjustment, press the multi-use button while adjusting thrust or
rotation. Be aware, however, this also activates the reaming function and will change steering
direction unless the tool is stopped at the original position before releasing multi-use button.
IMPORTANT: If full rotation seems restricted and insufficient to ream the hole, move carriage
back slightly until full rotation is possible, then move carriage forward while rotating.