KNOVA KN RO-1321 Manual Del Usuario página 8

OPERATION INSTRUCTIONS
NOTE: A core-box bit or V-groove bit is often used tor
routing letters and engraving objects. Straight bits and ball
mills are often used to make relief carvings. Veining bits
are used to carve small, intricate details.
NOTE: Making a single, deep cut is never advisable.
Smaller-diameter bits are easily broken by too much side
thrust and torque. Larger bits will cause a rough cut and
be difficult to guide and control. For these reasons, do not
exceed 1/8 in. depth of cut in a single pass.
WARNING
Always securely clamp the workpiece in
place, and keep a firm grip on the router base with both
hands at all times. Failure to do so could result in loss
of control causing possible serious personal injury.
EDGING WITH A PILOT BIT
Arbor-type blts with pilots are excellent for edge shaping any
workpiece edge that is straight or is curved with a curvature
that is equal to or greater than the radius of the bit that is used.
The pilot prevents the bit from making a cut that is too deep;
holding the pilot firmly in contact with the workpiece edge
throughout the cutting process prevents the cut from becoming
too shallow.
When the workpiece thickness and the desired depth of cut are
such that only the top part of the edge will be shaped, leaving
at least a 1/16-in. thick uncut portion below, the pilot can ride
against the uncut portion of the workpiece (Fig. 2).
If the workpiece is too thin or the bit is set so low so that there
will be no uncut edge against which to ride the pilot, an extra
board must be pla-ced under the workpiece to act as a guide
(see Fig. 3).
This "guide" board must have exactly the same shape as the
workpiece edge. If it is positioned so that its edge is flush with
the workpiece edge, the bit will make a full cut. If the guide
board is positioned extending beyond the workpiece edge, the
bit will make less than a full cut, altering the shape of the
finished edge.
Spindle lock
Fig. 2
Cutter-bit
Pilot
TOP EDGE SHAPING
Fig. 3
Pilot
Motor housing
Spindle
Collet/Nut
Sub-base
Top edge of workpiece
WHOLE EDGE
SHAPING
Workpiece
Whole edge
Guide board
of workpiece
WARNING
Always securely clamp the workpiece in
place, and keep a firm grip on the router base with both
hands at all times. Failure to do so could result in loss
of control causing possible serious personal injury.
FEEDING THE ROUTER (FIG. 4)
The secrets to professional-looking routing are careful setup for
the cut, proper depth-of-cut selection, knowing how the cutting
bit reacts in the workpiece, and the rate and direction of feed
of the router.
DIRECTION OF FEED EXTERNAL CUTS
The router motor and cutting bit rotate clockwise. This requires
the feed of the cutting bit to be from left to right (see Fig. 4).
Feeding the bit from left to right will cause the bit to pull the
router towards (up against) the workpiece. If the router is fed in
the opposite direction (right to left), the rotating force of the
cutting bit will tend to throw the bit away from the workpiece,
making it hard to control. This is called "Climb-Cutting" cutting
in the opposite direction of the proper feed direction. "Climb
Cutting" increases the chance of loosing control, resulting in
possible personal injury.
Fig. 4
Router feed
Router feed
Direction
When "Climb Cutting" is required (backing around a comer,
for example), exercise extreme caution to maintain control
of the router.
KICKBACK
Because of the high speed of the cutting bit during a proper
feeding operation (Ieft to right), there is very little kickback
under normal conditions. However, if the cutting bit strikes a
knot, an area of hard grain in the workpiece, or a foreign object,
the normal cutting action could be affected and cause
"Kickback".
This Kickback may cause damage to your workpiece, and could
cause you to lose control of the router, causing possible
personal injury. Kickback is always counterclockwise: the
opposite direction of the clockwise cutting bit rotation.
To guard against and help prevent Kickback, plan the set-up
and direction of feed so that the router is always moving, and
keep the sharp edges of the cutting bit so that they are biting
straight into new (uncut) wood (workpiece). Also, always
inspect the workpiece for knots, hard grain, and foreign objects
that could cause a kickback problem.
Router feed
Direction
Bit rotation
Direction