Scheppach PL75 Original Bedienungsanleitung Seite 22

Further safety instructions for all saws
Causes and operator prevention of kickback:
• kickback is a sudden reaction to a pinched, bound
or misaligned saw blade, causing an uncontrolled
saw to lift up and out of the workpiece 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 rapidly back toward the op-
erator;
• if 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 the result of saw misuse and/or incor-
rect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
a) Maintain a firm grip with both hands on the
saw and position your arms to resist kickback
forces. Position your body to either side of
the blade, but not in line with the blade. Kick-
back could cause the saw to jump backwards, but
kickback forces can be controlled by the operator,
if proper precautions are taken.
b) When blade is binding, or when interrupting
a cut for any reason, release the trigger and
hold the saw motionless in the material until
the blade comes to a complete stop. Never at-
tempt to remove the saw from the work or pull
the saw backward while the blade is in motion
or kickback may occur. Investigate and take
corrective actions to eliminate the cause of blade
binding.
c) When restarting a saw in the workpiece, cen-
tre the saw blade in the kerf and check that
saw teeth are not engaged into the material. If
saw blade is binding, it may walk up or kickback
from the workpiece as the saw is restarted.
d) Support large panels to minimise the risk of
blade pinching and kickback. Large panels
tend to sag under their own weight. Supports
must be placed under the panel on both sides,
near the line of cut and near the edge of the panel.
e) Do not use dull or damaged blades. Unsharp-
ened or improperly set blades produce narrow
kerf causing excessive friction, blade binding and
kickback.
f) Blade depth and bevel adjusting locking le-
vers must be tight and secure before making
cut. If blade adjustment shifts while cutting, it may
cause binding and kickback.
g) Use extra caution when making a "plunge
cut" into existing walls or other blind areas.
The protruding blade may cut objects that can
cause kickback.
22 | GB
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Safety instructions for plunge saws
a) Check guard for proper closing before each
use. Do not operate the saw if guard does not
move freely and enclose the blade instantly.
Never clamp or tie the guard with the blade ex-
posed. If saw is accidentally dropped, guard may
be bent. Check to make sure that guard moves
freely and does not touch the blade or any other
part, in all angles and depths of cut.
b) Check the operation and condition of the
guard return spring. If the guard and the
spring are not operating properly, they must
be serviced before use. Guard may operate
sluggishly due to damaged parts, gummy depos-
its, or a build-up of debris.
c) Assure that the guide plate of the saw will not
shift while performing the "plunge cut" when
the blade bevel setting is not at 90°. Blade shift-
ing sideways will cause binding and likely kick back.
d) Always observe that the guard is covering the
blade before placing saw down on bench or
floor. An unprotected, coasting blade will cause
the saw to walk backwards, cutting whatever is in
its path. Be aware of the time it takes for the blade
to stop after switch is released.
Additional safety instructions for all saws with
riving knife
a) Use the appropriate riving knife for the blade
being used. For the riving knife to work, it must
be thicker than the body of the blade but thinner
than the tooth set of the blade.
b) Adjust the riving knife as described in this in-
struction manual. Incorrect spacing, positioning
and alignment can make the riving knife ineffec-
tive in preventing kickback.
c) Always use the riving knife except when
plunge cutting. Riving knife must be replaced
after plunge cutting. Riving knife causes interfer-
ence during plunge cutting and can create kick-
back.
d) For the riving knife to work, it must be en-
gaged in the workpiece. The riving knife is inef-
fective in preventing kickback during short cuts.
e) Do not operate the saw if riving knife is bent.
Even a light interference can slow the closing rate
of a guard.
Additional safety instructions
• Never use abrasive wheels in the machine.
• Make sure that the riving knife is adjusted so that
the distance to the sprocket ring of the saw blade is
not more than 5 mm and that the sprocket ring does
not stick out more than 3 mm above the lower edge
of the riving knife.
• Make sure that the dust catching mechanism is cor-
rectly installed, as is described in this manual.