G9729 Combination Lathe/Mill
-37-
Reading the Charts
Charts for the powerfeed and thread cutting fea-
tures for the lathe are located on the bottom of the
lower belt guard.
Figure 38
shows a segment of
the chart for feed rates with a brief description.
Figure 38.
Rates given in millimeters and
inches.
Note—
These charts reflect approximate apron
movement per revolution of the leadscrew.
1.
Gear position A and the gears needed to
accomplish the available feed rates.
2.
The available feed rates in millimeters per
revolution.
3.
The available feed rates in inches per revolu-
tion.
4.
The feed lever position column.
5.
The available feed rate columns.
Feed rate gear settings are detailed in
Figure 38.
In the example below we will be selecting gears
for a feed rate of 0.002" per revolution:
1.
Find 0.002" on the chart in
Figure 38.
2.
Locate the number in gear position A, which
is above 0.002". The number in this case is
24, representing a gear with 24 teeth.
3.
Look at the column for the feed lever posi-
tion and find the roman numeral next to the
0.002". In this case III.
4.
Change the gears at the B, C, & D locations
as necessary (see Figures
38
&
42
).
To make a cut using a feed rate of 0.002" per
revolution, install the 24 tooth gear into position
A, (see
Figure 38
) and move the feed lever into
position III as in
Figure 39
. For making any other
gear changes, see the section titled
Changing
Gears
on
Page 39
.
Note—
The corresponding feed rate in millime-
ters would be 0.05 millimeters per revolution and
the gearing is identical.
Feed Rates
Figure 39.
Feed rate selector set to “III”.
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Содержание G9729
Страница 15: ...G9729 Combination Lathe Mill 13 Hardware Recognition Chart ...
Страница 66: ... 64 G9729 Combination Lathe Mill G9729 Headstock Assembly ...
Страница 68: ... 66 G9729 Combination Lathe Mill G9729 Crossslide Assembly ...
Страница 70: ... 68 G9729 Combination Lathe Mill G9729 Apron Assembly ...
Страница 72: ... 70 G9729 Combination Lathe Mill G9729 Rests Assemblies ...
Страница 73: ...G9729 Combination Lathe Mill 71 G9729 Compound Assembly ...
Страница 74: ... 72 G9729 Combination Lathe Mill G9729 Tailstock Assembly ...
Страница 79: ......