Pocket Cutting - Black and Decker Quantum Pro QP350 Manual De Instrucciones

617931-00QP350 Circular Saw NEW
TRIGGER AND BACK THE SAW
UNTIL IT IS LOOSE. BE SURE
BLADE IS STRAIGHT IN THE
CUT AND CLEAR OF THE
EDGE BEFORE RESTARTING.
As you finish a cut, release the
trigger and allow the blade to
stop before lifting the saw from
the work. As you lift the saw, the
spring-tensioned telescoping
guard will automatically close
under the blade. Remember the blade is exposed until this occurs,
never reach under the work for any reason whatsoever. When you
have to retract the telescoping guard manually (as is necessary for
starting pocket cuts) always use the retracting lever.
NOTE: When cutting thin strips, be careful to ensure that small
cutoff pieces don't hang up on inside of lower guard.
When ripping (cutting with the grain) the use of a rip fence is
recommended. (See Figure 7)

POCKET CUTTING

DISCONNECT PLUG FROM POWER SUPPLY WHEN MAKING
THIS OR ANY OTHER ADJUSTMENT. Adjust saw shoe so blade
cuts at desired depth. Tilt saw forward and rest front of the shoe on
material to be cut. Using the retracting lever, retract blade guard to
an upward position. Lower rear of shoe until blade teeth almost
touch cutting line. Now release the blade guard (its contact with the
work will keep it in position to open freely as you start the cut)
(Figure 20). Start the motor and gradually lower the saw until its
shoe rests flat on the material to be cut. Advance saw along the
cutting line until cut is completed. Release trigger and allow blade
to stop completely before withdrawing the blade from the material.
When starting each new cut, repeat as above. Never tie the blade
guard in a raised position.
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4/15/03 1:01 PM Page 9
FIG. 20
9
Kickback
When the saw blade becomes pinched or twisted in the cut, kickback
can occur. The saw is thrust rapidly back toward the operator. When
the blade is pinched or bound tightly by the kerf closing down, the
blade stalls and the motor reaction drives the unit backward. When
the blade becomes twisted or misaligned in the cut, the teeth at the
back edge of the blade can dig into the top surface of the wood
causing the blade to climb out of the kerf and jump back toward the
operator.
Kickback is more likely to occur when any of the following conditions
exist.
1. IMPROPER WORKPIECE SUPPORT
A. Sagging or improper lifting of the cut off piece causing
pinching of the blade.
B. Cutting through material supported at the outer ends only
(see Figure 17). As the material weakens it sags, closing
down the kerf and pinching the blade.
C. Cutting off a cantilevered or overhanging piece of material
from the bottom up in a vertical direction. The falling cut off
piece can pinch the blade.
D. Cutting off long narrow strips (as in ripping). The cut off strip
can sag or twist closing the kerf and pinching the blade.
E. Snagging the lower guard on a surface below the material
being cut momentarily reducing operator control. The saw
can lift partially out of the cut increasing the chance of blade
twist.
2. IMPROPER DEPTH OF CUT SETTING ON SAW
Using the saw with an excessive depth of cut setting increases
loading on the unit and susceptibility to twisting of the blade in
the kerf. It also increases the surface area of the blade
avaliable for pinching under conditions of kerf close down.
3. BLADE TWISTING (MISALIGNMENT IN CUT)
A. Pushing harder to cut through a knot, a nail, or a hard grain