Pattern Work - Grizzly G0510Z Instruction Manual

Sometimes the starting pin will not be in the most
advantageous position. To remedy this situation,
firmly clamp a board in the desired position to act
as a starting fixture (see Figure 30). Some type
of pivot point must be used.
Figure 30. Starting fixture in place for jig.
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.
When using a solid rub collar, do not use
excessive pressure when running your workpiece
through the shaper. Otherwise, a groove may
burn into your pattern and be transferred to your
workpiece. Instead, take several passes, using
lighter pressure against the rub collar. If you find
this to be a consistent problem, you may consider
using ball bearing rub collars instead of solid col-
lars. See Section 5: Accessories on Page 27,
the current Grizzly catalog, or www.grizzly.com
for listings of ball bearing rub collars.
G0510Z 3⁄4 HP Shaper

Pattern Work

When using a pattern, the rub collar can be posi-
tioned either above, below, or between cutters.
The pattern is usually used when the entire edge
is to be shaped or when many duplicate pieces
are needed. Pattern work is particularly useful
when rough cutting irregular shapes oversize and
then shaping the edge in a simple two-step oper-
ation. A pattern can be incorporated into a fixture
by way of adding toggle clamps, hand holds, or
other safety devices.
You have greater flexibility when choosing the
correct diameter rub collar for pattern work than
for non-pattern work. If you look at Figure 31, you
will notice that the position of the pattern deter-
mines the depth of cut. In other words, your pat-
tern size is dependent upon the inter-relationship
of cutting circle, the desired amount of material
removed and the rub collar size. The cutting circle
is the given in the equation, while the pattern and
the rub collar size are the variables. Changing
one or both of these will change the amount of
material removed. Planning ahead, you can best
decide which rub collars are best suited for your
application.
Pattern
Figure 31. Rub collar determines depth of cut.
Rub Collar
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