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C. PATTERN WORK
When using a pattern, the rub collar can be positioned either above, below, or in-between cutters.
See Figure 20.
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 operation. A pattern can be incorporated into a fixture by way
of adding toggle clamps, hand holds, or other safety devices.
Spindle Assembly
Table
Table
Spindle Nuts
Rub Collar
Cutter
Workpiece
Pattern
Figure 20
- 22 -
Spindle
You have greater flexibility when choosing the correct diameter rub collar for pattern work than for
non-pattern work. If you look at Figure 20, you’ll notice that the position of the pattern determines the
depth of cut. In other words, your pattern size is dependent upon the inter-relationship of cutting cir-
cle, 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.
XIII. SHAPING
A. STRAIGHT STOCK
When shaping straight stock, use the fence assembly. See the fence adjustment section for infor-
mation on aligning fences.
1. Select the appropriate cutter and lock onto the spindle.
2. Check cutter rotation.
3. Adjust the spindle height to align the workpiece to the cutter. See the spindle height section for
details.
4. Lock the spindle into position.
Safety Washer