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13
ADJUSTING BLADE
TENSION
Tension is applied to the blade when the blade tension
lever (A) Fig. 27, is in the rear position, as shown. When
the lever (A) is moved forward, as shown in Fig. 28,
blade tension is released.
When adjusting blade tension, lever (A) should be in the
forward position, as shown in Fig. 28. To increase blade
tension, turn knob (B) Fig. 28, clockwise and to decrease
blade tension, turn knob (B) counterclockwise. NOTE: It
is necessary to adjust the blade tension knob (B) only
when the blade is removed from both upper and lower
blade holders and a new or different type of blade is
assembled to the holders. It is not necessary to adjust
blade tension when the blade is removed and replaced in
only the upper blade holder as in performing inside
cutting operations.
Adjusting the blade for proper tension is usually
accomplished by trial and error. One method is to pull
back on the blade tension lever (A) Fig. 28, the blade
should start to have tension (resistance) when the blade
tension lever is half way between open Fig. 28, and
closed Fig. 27. Finer blades require more tensioning
while thicker blades require less tension.
Fig. 27
Fig. 28
A
A
B
ADJUSTING
CLAMPING ACTION OF
UPPER BLADE HOLDER
Different widths of scroll saw blades will make it
necessary to adjust the clamping action of the upper
blade holder. It should be noted, however, that very little
adjustment is necessary and very little clamping force is
required to hold the blade.
1. Move the chuck locking lever (C) Fig. 23, to the rear
(open) position, as shown.
2. Turn locknut (C) Fig. 29, clockwise to tighten and
counterclockwise to loosen the clamping action of the,
blade holder. Very little movement of locknut (C) is
necessary.
Fig. 29
A
C