Headstock Travel (Z-Axis & Rotation); Raising & Lowering - Grizzly G0720R Owner's Manual

Headstock Travel
(Z-Axis & Rotation)
Your mill has a dovetailed column that allows you
to reposition the headstock along the Z-axis and
change tooling without losing your alignment with
a hole or milling path. For angled milling opera-
tions, the headstock can be rotated left and right
45°.
Raising & Lowering
1. Unlock the headstock slide lock lever shown
in Figure 18.
Headstock
Tilt Hex Nut
Headstock
Slide Lock
Lever
Figure 18. Headstock slide controls.
2. On the control panel push the UP or DOWN
buttons (see Figure 19) to raise or lower the
headstock with the elevation motor.
Elevation Motor
Up and Down
Buttons
Figure 19. Z-axis control.
-24-
3.
Observe the height scale on the left side
column shown in Figure 20 to determine the
headstock travel. This scale is broken down
in ⁄ " graduations.
1
8
Note: When the headstock reaches a point
of travel where the leadscrew has run out of
thread, a stop block (see Figure 20) contacts
either the upper or lower limit switch to stop
the elevation motor from over running the
physical limitations of the leadscrew length,
which would cause damage.
Figure 20. Column switches and scale.
Note: For maximum spindle rigidity when
milling, keep the spindle retracted into the
headstock as far as possible with the quill
lock lever locked and with the fine feed lock
knob tightened.
Model G0720R (Mfg. Since 11/10)
Upper Limit Switch
Elevation Scale
and Pointer
Stop Block
Lower Limit Switch