Power Feed - Grizzly G0949G 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 levers and dial 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 54.
If the feed selection lever and the half nut
are engaged at the 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 G0949G (Mfd. Since 01/22)
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 62–66 and the following descrip-
tions to understand the power feed controls.
Note: Before using power feed, you may have to
reconfigure the end gears, depending on how they
are set up. Refer to End Gears on Page 51 for
detailed instructions.
A
Figure 62. Power feed controls on the
headstock.
A. Feed Direction Selector: Selects direction
of carriage travel for power feed relative to
the rotation direction of spindle. When lever
is positioned as shown in Figure 62, carriage
will move left (toward the spindle), or cross
feed will travel toward rear of lathe when spin-
dle is rotating counterclockwise (or toward
front of lathe). When lever is positioned in
opposite direction, carriage will move right
(toward tailstock), or cross feed will travel
toward front of lathe when spindle is rotating
clockwise (or toward the rear of lathe).
B. Feed Rate Selector: Sets desired feed/
thread rate. Refer to Setting Power Feed
Rate subsection on Page 50 for detailed
instructions.
C. Feed/Thread Selector: Left position selects
thread. Right position selects feed.
B
C
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