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When making a pattern jig here are a few things
to consider:
1.
Build your jig from a material that will
smoothly follow the rub collar or fence.
2.
Make the jig stable, using proven methods
and materials, and fasten the hand holds for
operator comfort and safety.
3.
Secure your workpiece on the three sides
that will not be cut with toggle clamps, or fas-
ten the workpiece to the jig with wood
screws. Ensure that clamps and hidden
screws do not come into contact with the cut-
ter.
4.
Design your jig so that all cutting occurs
underneath the workpiece as shown in
Figure 29. Notice the operator is not
exposed to the cutting edge of the cutter!
Figure 29. Pattern jig for making curved pieces
(guard removed for clarity).
5.
Always consider the cutting circle and rub
collar diameter for the correct cutting depth
when designing your pattern.
6.
Make sure the workpiece rests flat on the
table, not on the fixture.
Workpieces must be solid, stable, and
secured to the jig; or kickback may occur,
causing personal injury.
G9862/G9968 Shaper
Workpiece fits here
Irregular shaping takes a high degree of skill and
dexterity. The fence assembly is not used during
irregular shaping, so rub collars must be used.
Also, unless your jig is designed to touch the rub
collar before contacting the blade, a starting fix-
ture must be used to begin your cut.
About starting fixtures:
The purpose of the starting fixture is to support
the workpiece during the beginning of the cut.
The workpiece is typically placed in the starting
position using the starting fixture for support,
Then swung into the cutter while holding the
workpiece firmly against the starting fixture. After
the cut has been started, the work is swung away
from the starting fixture and is supported only by
the rub collar. Always feed against the rotation
of the cutter and do not start cuts at corners.
To use your pattern jig:
1.
Remove the fence assembly. Choose the
appropriate cutter and rub collar for your
application and lock them in place. Secure
your workpiece to the pattern jig.
2.
Check cutter rotation, and adjust the spindle
height to align the cutter to your workpiece.
Clamp a starting fixture to the table surface,
using the location that best supports your
work.
3.
If everything is correct and the cutter is tight.
Turn the shaper on.
4.
Place your jig/workpiece against the starting
fixture. Using firm pressure, pivot the work-
piece into the cutter and make sure the jig is
touching the rub collar. Keep your jig in con-
tact with the rub collar and slowly follow the
pattern, moving against the cutter rotation.
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