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11
Evaluating Cutting Efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by
the cutting blade.
If the chip formation is powdery, then the feed is
much too light, or the blade is dull.
If the chips formed are curled, but colored – blue
or straw colored from heat generated during the
cut – then the feed rate is too high.
If the chips are slightly curled and are not
colored by heat – the blade is sufficiently sharp
and is cutting at its most efficient rate.
Work Setup
Referring to Figure 8:
1. Set the feed rate control knob (C) to zero.
2. With the lifting handle (A) raise the saw
head (B).
3. Turn the vise handwheel (D) counterclock-
wise enough to free the moveable vise
jaw (E). Then pull the moveable vise jaw
away from the fixed vise jaw (H).
4. Place the workpiece (F) on the work
table (G).
For long workpieces, provide support at the
other end. If necessary, provide additional
downward clamping to hold the workpiece
securely on the worktable.
5. Clamp the workpiece (F) in the vise by first
pushing the moveable vise jaw (E) against
the workpiece. Then rotate the vise hand-
wheel (D) clockwise to secure the work-
piece.
Figure 8
Setting The Vise For Angle Cuts
Referring to Figure 9, the vise can be adjusted
through a 45-degree arc as follows:
1. Loosen the lock handle (E) that secures the
fixed vise jaw (D).
2. Rotate the fixed vise jaw (D) to the desired
angle, setting it to the scale on the back
edge of the table.
For accurate cuts, use a variable protractor
to set the position of the jaw, aligning one
side of the protractor with the blade.
3. Tighten the lock handle (E).
4. Loosen the hex head bolt (A) on the
moveable vise jaw (C).
5. Place the workpiece (B) between the vise
jaws (C, D).
6. Set the moveable vise jaw (C), pressing it
against the side of the workpiece (B) and
fixed vise jaw (D).
7. Tighten the hex head bolt (A) on the
moveable vise jaw to secure the jaw.
Figure 9
Setting the Vise for Square Cuts
The procedure for setting the vise for square
cuts is identical to setting for angle cuts (above)
except that a machinist’s square is used to set
the angle of the fixed vise jaw (J, Fig. 10). Align
one side of the square with the side of the slot
(G, Fig. 10) in the table.
Figure 10