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Tomakedeepercutsit isthereforenecessaryto
makeasmanysuccessivepassesasrequired,
loweringthebit1/8inchforeachnewpass.inorderto
savetime,doallthecuttingnecessaryatonedepth
setting,beforeloweringthebitforthenextpass.This
willalsoassurea uniformdepthwhenthefinalpassis
completed.See Figure 12.
2NDPASS
1STPASS
2NDPASS
ISTPASS
Fig.12
DIRECTION OF FEED AND THRUST
The router motor 8rid bit revolve in a clockwise direction.
This gives the tool a slight tendency to twist (in your
hands) in a counterclockwise direction, especially when
the motor revs up (as at starting).
Because of the extremely high speed of bit rotation
during a "proper feeding" operation, there is very little
kickback to contend with under normal conditions. How-
ever, should the bit strike a knot, hard grain, foreign
object, etc. that would affect the normal progress of the
cutting action, there will be a slight kickback -- sufficient
to spoil the trueness of your cut ifyou are not prepared.
Such a kickback is always inthe direction opposite tothe
direction of bit rotation.
To guard against such a kickback, plan your setup and
direction of feed so that you will always be thrusting the
tool --to hold it against whatever you are using to guide
the cut -- in the same direction that the leading edge of
the bit is moving. In short, the thrust should be in a
direction that keeps the sharp edges of the bit continu-
ously biting straight into new (uncut) wood.
ROUTING
Whenever you are routing a groove, your travel
should be in a direction that places whatever guide
you are using at the right-hand side. In short, when
the guide is positioned as shown in the first part of
Figure 13, tool travel should be left to right and
counterclockwise around curves. When the guide is
positioned as shown in the second part of Figure 13
tool travel should be right to left and clockwise around
curves. If there is a choice, the first setup is generally
the easiest to use. In either case, the sideways thrust
you use is against the guide.
GUIDEOUTSIDE
_ THRUST _ I]ll _
.OTATION
.," _ -_2/ :._:_
GUIDE--
FEED
THRUST
GUIDEINSIDE Fig. 13
12