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Adjusting Radius
This fretboard radiusing attachment is capable of
creating radiuses from 8" to 16" by adjusting the
distance from the swing arm shaft to the sanded
surface.
To adjust the radius:
1.
Loosen the button head cap screws that
secure the swing arm shafts to the height
adjustment arms as shown in Figure 11.
Swing Arm
Cap Screw
X"
Fretboard
Figure 11. Swing arm shaft adjustment.
2.
Adjust the height from the bottom surface of
the fretboard to the center of the swing arm
shaft to the desired radius.
Example: To achieve a 16" radius on the
fretboard, the distance shown as X" in Figure
11 would be 16".
3.
Repeat Step 2 on the other end of the
fretboard.
Note—To create a compound radius, the
distance from the fretboard to the swing arm
shaft will be different on each end.
G0577 Fretboard Radiusing Attachment
Sanding
To radius a fretboard:
1.
Adjust the height adjustment arm so the
cross member is parallel with the sanding belt
as shown in Figure 12.
Note—Notice how the swing arm shafts in
Figure 12 are different distances from the
fretboard (to create a compound radius),
but the fretboard is parallel with the sanding
belt.
Leveling
Knobs
Cross
Member
Figure 12. Adjusting the cross member parallel
with the sanding belt.
2.
Use the leveling knobs to fine tune the height
so the swing arm can have free motion.
3.
Turn the sander ON. Lower the fretboard with
the leveling knobs and swing the swing arm.
Continue with this step until the fretboard is
sanded across its entire surface.
4.
Check the fretboard for the desired radius
with radius gauges.
—If the radius is incorrect, increase the dis-
tance between the swing arm shaft and the
fretboard to make a larger radius; shorten it
to make a smaller radius.
—If the radius is correct, continue sanding
the fretboard to the desired thickness.
-11-
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