DeWalt DWE7490 Manual De Instrucciones página 5

TERMS: THE FOLLOWING TERMS WILL BE USED THROUGHOUT THE MANUAL
AND YOU SHOULD BECOME FAMILIAR WITH THEM.
• Thru-sawing refers to any cut that completely cuts through the workpiece.
• Non thru-sawing refers to any cut that does not completely cut through the workpiece.
• Push Stick refers to a wooden or plastic stick, usually homemade, that is used to push
small workpiece through the saw and keeps the operator's hands clear of the blade.
• Kickback occurs when the saw blade binds in the cut and violently thrusts the workpiece
back toward the operator.
• Freehand refers to cutting without the use of a miter gauge or rip fence or any other
means of guiding or holding the workpiece other than the operator's hands.
WARNING: Never perform freehand cutting with this saw.
• Plunge cutting refers to cutting where the workpiece is either lowered down onto the
blade with the workpiece controlled by the user's hands or the workpiece is supported
by the user's hands on the table surface and the blade is then raised up through the
workpiece.
WARNING: Never perform plunge cutting with this saw.
• Resawing - Flipping material to make a cut the saw is not capable of making in one pass.
WARNING: Resawing IS NOT recommended.
• Outfeed - The distance behind the saw required to pass the material all the way through
the cut.
SAW BLADE GUARD ASSEMBLY, ANTI-KICKBACK ASSEMBLY AND RIVING KNIFE
This table saw is equipped with a blade guard assembly with splitter and anti-kickback
assembly that covers the blade and reduces the possibility of accidental blade contact. A
non thru-sawing riving knife is also provided when making non thru-cuts. The riving knife and
splitter are flat plates that fit into the cut made by the saw blade and effectively fights kickback
by lessening the tendency of the blade to bind in the cut. The blade guard assembly and
anti-kickback assembly can only be used when making thru-cuts that sever the
wood. When making rabbets and other cuts that make non thru-cuts, the blade
guard assembly and anti-kickback assembly must be removed and then install the
non thru-sawing riving knife provided. Two anti-kickback pawls are located on the sides
of the riving knife that allow the wood to pass through the blade in the cutting direction but
reduce the possibility of the material being thrown backwards toward the operator.
Use all components of the guarding system (blade guard assembly, riving knife and anti-
kickback assembly) for every operation for which they can be used including all thru-cutting.
If you elect not to use any of these components for a particular application exercise additional
caution regarding control of the workpiece, the use of push sticks, the position of your hands
relative to the blade, the use of safety glasses, the means to avoid kickback and all other
warnings contained in this manual and on the saw itself. Replace the guarding systems
as soon as you return to thru-cutting operations. Keep the guard assembly in working
order.
MAKING A PUSH STICK (Inside Back Cover)
• In order to operate this table saw safely you must use a push stick whenever the size or
shape of the workpiece would cause your hands to be within 6" (152 mm) of the saw blade
or other cutter. A push stick is included with this saw.
• No special wood is needed to make additional push-sticks as long as it's sturdy and long
enough. A length of 15.7" (400 mm) is recommended with a notch that fits against the
edge of the workpiece to prevent slipping. It's a good idea to have several push sticks
of the same length (15.7" [400 mm] ) with different size notches for different workpiece
thicknesses.
• See the inside back cover for a picture of a push stick. The shape can vary to suit your
own needs as long as it performs its intended function of keeping your hands away from
the blade.
KICKBACKS
Kickbacks can cause serious injury. A kickback occurs when a part of the workpiece binds
between the saw blade and the rip fence, or other fixed object, and rises from the table
and is thrown toward the operator. Kickbacks can be avoided by attention to the following
conditions.
How to Avoid Them and Protect Yourself from Possible Injury
a. Use the blade guard with splitter, or use the riving knife whenever possible.
b. Be certain that the rip fence is parallel to the saw blade.
c. Do not rip by applying the feed force to the section of the workpiece that will become
the cut-off (free) piece. Feed force when ripping should always be applied between the
saw blade and the fence; use a push stick for narrow work, 6" (152 mm) wide or less.
d. Keep saw blade guard assembly, riving knife and anti-kickback assembly in place and
operating properly. If anti-kickback assembly is not operational, return your unit to
the nearest authorized D WALT service center for repair. The splitter and riving knife
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must be in alignment with the saw blade and the anti-kickback assembly must stop a
kickback once it has started. Check their action before ripping by pushing the wood
under the anti-kickback assembly. The teeth must prevent the wood from being pulled
toward the front of the saw.
e. Plastic and composite (like laminate flooring) materials may be cut on this saw.
However, since these are usually quite hard and slippery, the anti-kickback pawls may
not stop a kickback. Therefore, be especially attentive to following proper set up and
cutting procedures for ripping.
f. Use saw blade guard assembly, anti-kickback assembly and riving knife for every
operation for which it can be used, including all thru-sawing.
g. Push the workpiece past the saw blade prior to release.
h. NEVER rip a workpiece that is twisted or warped, or does not have a straight edge to
guide along the fence.
i. NEVER saw a large workpiece that cannot be controlled.
j. NEVER use the fence as a guide or length stop when crosscutting.
k. NEVER saw a workpiece with loose knots, flaws, nails or other foreign objects.
l. NEVER rip a workpiece shorter than 10" (254 mm).
m. NEVER use a dull blade – replace or have resharpened.
WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses.
Also use face or dust mask if cutting operation is dusty. ALWAYS WEAR CERTIFIED SAFETY
EQUIPMENT:
• ANSI Z87.1 eye protection (CAN/CSA Z94.3),
• ANSI S12.6 (S3.19) hearing protection,
• NIOSH/OSHA/MSHA respiratory protection.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm. Some examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work.
To reduce your exposure to these chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are specially designed to filter out
microscopic particles.
• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling,
and other construction activities. Wear protective clothing and wash exposed
areas with soap and water. Allowing dust to get into your mouth, eyes, or lay on the
skin may promote absorption of harmful chemicals.
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