Crown CT15189, Оригинальное руководство пользователя, Страница: 22 / 156

22
English
Following setting up the number of stroke
rate of the saw blade 15 it is recommend-
ed to make a test saw cut using a spare
piece of the blank part (made of the same
material as the part to be processed).
When operating your power tool at a low speed for a
long time, it has to be cooled down for 3 minutes� To
do it, set a maximum stroke rate and leave your power
tool to run idle�
Pendulum rate selection
Pendulum rate facilitates selecting the optimal sawing
regime (feed velocity, the appearance of the saw cut,
etc�) for the processed material�
With each downward move the saw blade
15
is driven
back from the blank part which improves the release
of the sawdust, reduces the heating up and increases
the operating life of the saw blade
15
� Moreover the
reduction of the feed force allows the worker to operate
the instrument without getting tired�
The degree of the pendulum strike may be changed
when operating the power tool� The lever for pendulum
stroke adjustment
10
allows setting four steps of the
pendulum stroke:
Step 0:
No pendulum action;
Step I:
Small pendulum action;
Step II:
Medium pendulum action;
Step III:
Large pendulum action�
It is recommended to consider the following rec-
ommendations when selecting the degree of the
pendulum rate:
•
when the edge of the saw cut must be exact and
clean, select small pendulum rate or switch the pen-
dulum rate off;
•
switch the pendulum rate off when processing thin
(sheet metal, sheet plastic, etc�) or hard materials
(alloy-free steel, non-ferrous metals, etc�);
•
when sawing soft materials (soft wood, etc�) se-
lect large pendulum rate; it will increase the speed
of the operation, however the quality of the saw cut
may be reduced�
It is recommended to make a test saw
cut using a spare piece of the blank part
(made of the same material as the blank
part to be processed) after the pendulum
rate is selected.
Protection against contact with saw blade
Contact protector prevents accidental contact
with saw blade
15
and improves safety of work
performance�
Recommendations on the power tool
operation
Selecting the saw blade
Saw blades 15 of T-type may be used
with all of the jigsaw models.
Before starting the operation, please select the appro-
priate type of the saw blade
15
which should corre-
spond to the sawed material, sawing regime and the
quality of the edge of the saw cut� The designation of
the saw blade is printed on the package; you may also
ask the salesperson�
General guidelines for cutting
Make a test saw cut using a spare piece of
the blank part (made of the same material
as the material of the blank part) in order
to make sure that the saw blade 15, the
sawing speed and the pendulum strike have been
selected appropriately.
•
Make sure that the blank part is tightly fastened and
that all of the metal pieces (nails, screw nails, etc�)
have been removed from it�
•
Turn the power tool on before the saw blade
15
comes in contact with the blank part� Do not use extra
force; the operation requires some time� Extra force
will not speed up the operating process, but it will over-
load the tool�
•
When the teeth of the saw blade
15
are too large for
the blank part (excessive vibration, splitting and chipping
of the processed surface will serve as a sign of the teeth
being too large), turn off the power tool immediately and
replace the saw blade
15
with the appropriate blade�
•
If the saw blade
15
jams during the operation, turn off
the power tool immediately and try to expand the saw cut,
then carefully remove the saw blade
15
from the saw cut�
• After the cutting is finished, first turn the power tool
off and then remove the saw blade
15
from the saw cut�
When cutting certain materials (like
metals), the saw blade 15 may heat up
excessively, therefore it is recommended
to use cooling or lubricating substances
which are to be applied to the point where the saw
blade 15 comes in contact with the blank part.
Plunge sawing (see fig. 5)
Plunge sawing may be used only when
sawing soft materials, such as wood,
plasterboard, etc. This operating
technique facilitates sawing the holes
without preliminary drilling - the saw blade 15 cuts
through the blank part on its own. This technique
requires certain skill and may be applied using
short saw blades 15.
•
Position the power tool on the front edge of the base
plate
11 (see fig. 5) and turn it on. Slowly plunge the
blank part with the saw blade
15
by pressing the power
tool to the blank part�
•
Once the saw blade
15
cuts through the blank part
return the power tool into its normal operating position
and continue cutting along the marked line�