Power Feed - Grizzly G0750GV Owner's Manual

Power Feed

Both the carriage and cross slide have power feed
capability when the carriage is engaged with the
feed rod. The rate that these components move
per revolution of the feed rod is controlled by the
quick-change gearbox lever positions and the end
gear configuration.
The feed per revolution and the spindle speed
must be considered together—this is the feed
rate. The sources you use to determine the opti-
mum spindle speed for an operation will also
provide the optimal feed to use with that spindle
speed.
Often, the experienced machinist will use the
feeds and speeds given in their reference charts
or web calculators as a starting point, then make
minor adjustments to the feed rate (and some-
times spindle speed) to achieve the best results.
The carriage can alternately be driven by the
leadscrew for threading operations. However, this
section only covers the use of the power feed
option for the carriage and cross slide compo-
nents for non-threading operations. To learn how
to power the carriage for threading operations,
refer to Threading on Page 51.
If feed selection lever and half nut are
engaged at same time, machine damage
could occur. Even though there is a lock-
out device to prevent this, it could break if
forced.
Before using any power feed or threading
operations, make sure to loosen carriage
lock first. Ignoring this warning can cause
serious machine damage.
Model G0750GV (Mfd. Since 03/18)
To avoid damaging the lathe, ALWAYS make
sure the spindle is completely stopped
BEFORE using the headstock controls to
make changes.
Power Feed Controls
Use Figures 62–63 and the following descrip-
tions to understand the power feed controls.
IMPORTANT: Before using power feed, you may
have to re-configure the end gears, depending on
how they are set up. Refer to End Gears on Page
49 for detailed instructions.
A
B
C
Figure 62. Power feed controls.
A. Feed Direction Lever: Selects the direction
for power feed. When the lever is positioned
as shown in Figure 62, the carriage will move
along the bed toward the spindle, or the cross
feed will travel toward the rear of the lathe.
B. Feed Rate Chart: Displays the settings
for the quick-change gearbox dials for the
selected feed rate. Refer to Setting Power
Feed Rate subsection on the next page for
detailed instructions.
C. Quick-Change Gearbox Feed Dials: Refer
to feed rate chart to position these to select
different feed rates.
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