Grizzly G9972Z, Owner'S Manual

Page: 43 / 84

Model G9972Z (Mfd. Since 03/20)
-41-
4. Configure the V-belt on the pulleys according
to the letter and number combination under
the selected spindle speed from the chart in
Figure 48.
Position the idler pulley on top of the V-belt
with enough downward pressure to provide
tension to the belt, then fully secure it in
place. There is correct tension to the V-belt
when there is approximately
1
⁄
2
" deflection
when moderate pressure is applied to the
V-belt half-way between the pulleys.
Note: The pulley slots are numbered 1–3
with number 1 being the outside slot.
— For "A–C" configurations (see
Figure 49),
position the longer V-belt (32" in circum-
ference) in the correct "C" pulley slot, then
roll it onto the "A" pulley.
—For "B–C" configurations (see Figure 50),
place the shorter V-belt (29" in circumfer-
ence) in the correct "C" pulley slot, then
roll it onto the "B" pulley.
Power Feed
"Power Feed" on a lathe simply means using the
machine-driven components to feed the tool into
the workpiece rather than feeding it manually with
handwheels.
The speed at which the carriage travels is set with
the feed rate dials (see
Feed Rate on Page 42
for detailed instructions), but it also depends on
spindle speed.
NOTICE
Feed rate is based on the spindle speed.
High feed rates result in a rapidly moving
carriage. Pay close attention to the feed
rate you have chosen and keep your hand
poised over the power feed lever. Failure to
fully understand this could cause the car-
riage to crash into the spindle or tailstock
resulting in severe damage to the lathe.
When the proper feed rate has been selected for
the operation, simply move the power feed lever
up to engage the carriage with the power feed
(see
Figure 51). Move the lever down to disen-
gage the power feed.
When the spindle is rotating counterclockwise
(towards the operator), the carriage will move
toward the spindle when engaged with the power
feed. Conversely, when the spindle is rotating
clockwise (away from the operator), the carriage
will move toward the tailstock.
Note: If the spindle is not turning, you may have
to manually jog the carriage to engage the apron
gearing with the leadscrew.
NOTICE
NEVER attempt to engage the carriage
power feed (lever up) and the half-nut (lever
down) at the same time. Always disengage
the half-nut (lever up) before moving the
power feed lever up. Otherwise, severe
damage to the lathe could occur.
Figure 51. Power feed lever engaged and
disengaged.
Disengaged (Off)
Engaged (On)