South Bend Tools SB1007, Руководство пользователя

Страница: 45 / 84

South Bend Tools
For Machines Mfd. Since 12/21 Model SB1007
-43-
O P E R A T I O N
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 (feed rate) is controlled by the headstock
levers, quick-change gearbox knobs, and end gear
configuration.
Feed rate and spindle speed must be considered
together. Keep in mind that the feed rate is
expressed as the amount of tool travel per one
revolution of the spindle. The sources you use
to determine the optimum spindle speed for an
operation will also provide the optimal feed rate
to use with that spindle speed.
Often, experienced machinists 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 sometimes
spindle speed) to achieve the best results.
In the event that feed rates and/or spindle
speeds should overload the system, the feed rod
is equipped with a spring-loaded slip clutch that
will cause feeding operations to stop in order to
prevent a crash that could damage the gears or
chuck.
For threading operations, the carriage can be
driven by the leadscrew. However, this section
only covers the use of the power feed option
for the carriage and cross slide components for
non-threading operations. To learn how to power
the carriage for threading operations, refer to
Threading on Page 47.
ALWAYS make sure spindle is completely
stopped BEFORE using headstock control
levers to make changes. If spindle is rotating
when attempting to change configuration of
headstock feed controls, gears in headstock
and quick-change gearbox will become
damaged!
Power Feed Controls
Use Figures 57–59 and the following
descriptions to become familiar with the locations
and functions of the power feed controls.
Before using power feed, you may have to re-
configure the end gears, depending on the
operation (refer to End Gears on Page 45 for
detailed instructions).
Figure Figure 57. Quick-change gearbox and power feed . Quick-change gearbox and power feed
controls. controls.
B B
A A
To avoid damaging lathe components, do not
attempt to engage feed selection lever and
half nut lever at the same time.
A. Quick-Change Gearbox Knobs: Control feed
rod speed for power feed operations.
B. Feed Direction Lever: Selects carriage
or cross slide direction for power feed
operations. This lever works in tandem with
the apron feed selection lever and must be
engaged for power feed to function.