Grizzly G0791, Owner'S Manual

Page: 69 / 132

Model G0791 (Mfd. Since 9/15)
-67-
Headstock
Movement
The milling headstock travels up and down the
column (Z-axis) and tilts 90° left or right relative
to the table.
Tool Needed Qty
Open-End Wrench 13mm .................................. 1
1. Loosen two Z-axis lock bolts on right side of
headstock (see
Figure 102).
2. Use Z-axis handwheel shown in Figure 102
to adjust headstock height and relative posi-
tion of cutting tool before cutting.
Note: Rotate the Z-axis handwheel clockwise
to raise the headstock, or counterclockwise
to lower it.
Raising/Lowering Headstock
3. Re-tighten Z-axis lock bolts.
Figure 102. Mill Z-axis controls.
Z-Axis Lock
Bolts (1 of 2)
Engaging Fine Downfeed Controls
In the following example, the fine downfeed
controls are used to mill 0.010" off a workpiece:
Vertical Travel
Handwheel
1. Loosen Z-axis lock bolts, use vertical travel
handwheel (see
Figure 102 on this page) to
adjust cutting tool just above workpiece sur-
face, then secure headstock with Z-axis lock
bolts.
2. Loosen quill lock bolt (see Figure 101 on
Page 66).
3. Push downfeed selector knob (see Figure
101 on Page 66) all the way in to engage fine
downfeed handwheel.
4. Loosen depth scale lock knob.
5. Rotate fine downfeed handwheel clockwise
and lower cutting tool so it just touches
workpiece.
6. Move workpiece out of the way.
7. Using graduated dial to gauge spindle move-
ment, rotate fine downfeed handwheel clock-
wise 0.010".
8. Tighten quill lock bolt.
9. Turn mill/drill ON and perform cutting pass.
Tool Needed Qty
Open-End Wrench 13mm .................................. 1