RIDGID R4221 Operator's Manual page 31

OPERATION
TO COMPOUND MITER CUT
See Figure 42.
A compound miter cut is a cut made using a miter angle and
a bevel angle at the same time. This type of cut is used to
make picture frames, cut molding, make boxes with sloping
sides, and for certain roof framing cuts.
To make this type of cut the control arm on the miter table
must be rotated to the correct angle and the saw arm must
be tilted to the correct bevel angle. Care should always
be taken when making compound miter setups due to the
interaction of the two angle settings.
Adjustments of miter and bevel settings are interdependent.
Each time you adjust the miter setting you change the effect
of the bevel setting. Also, each time you adjust the bevel
setting you change the effect of the miter setting.
It may take several settings to obtain the desired cut. The
first angle setting should be checked after setting the second
angle, since adjusting the second angle affects the first.
Once the two correct settings for a particular cut have been
obtained, always make a test cut in scrap material before
making a finish cut in good material.
NOTE: It may be necessary to adjust or remove the sliding
miter fence to insure proper clearance prior to making the cut.
 Make sure the slide lock knob is tightened securely.
 Raise saw arm to its full height.
To move the miter table to any of the indexed miter stops
(0°, 15°, 22.5°, 31.6°, 45°, 60° and 67.5° left or right):
 Lift the miter lock lever and press the miter detent bypass
button halfway. Release the detent bypass button. The
miter table will click into place when it reaches an indexed
stop.
 Push the miter lock lever down to lock the miter table.
To move the miter table to any desired position on the
miter scale:
 Lift the miter lock lever and press the miter detent bypass
button. Set the miter table to zero.
 Push the miter lock lever down to lock the miter table.
 Place the bevel lock lever in the center position to select
one of the preset bevel settings or place the bevel lock
lever in the forward position to select any desired setting.
 Move the saw arm left or right to the desired bevel angle.
 Push the bevel lock lever to its locked position.
 Place the workpiece flat on the miter table with one edge
securely against the fence. If the board is warped, place
the convex side against the fence. If the concave edge
of a board is placed against the fence, the board could
collapse on the blade at the end of the cut, jamming the
blade. See Figures 51 - 52 .
 When cutting long pieces of lumber or molding, support
the opposite end of the stock with a roller stand or with
a work surface level with the saw table. See Figure 44.
 Align the cutting line on the workpiece with the edge of
saw blade.
 Grasp the stock firmly with one hand and secure it against
the fence. Use the work clamp or a C-clamp to secure
the workpiece when possible.
 Before turning on the saw, perform a dry run of the cut-
ting operation to make sure that no problems will occur
when the cut is made.
 Align cutting line on the workpiece with the edge of saw
blade.
 Turn the LED switch on to project the blade shadow onto
the workpiece.
 Make a test cut in scrap material.
 Grasp the saw handle firmly. Turn the saw on and allow
several seconds for the blade to reach maximum speed.
 Slowly lower the blade into and through the workpiece.
 Release the switch trigger and allow the saw blade to
stop rotating before raising the blade out of workpiece
and removing the workpiece from the miter table.
31 - English
COMPOUND
MITER CUT
Fig. 42