Plunge Cutting - Bosch JS120 Operating/Safety Instructions Manual

Plunge Cutting

Plunge cutting is useful and time-saving
in making rough openings in softer
materials. It is not necessary to drill a
hole for an inside or pocket cut. The
longest blade to be used for plunge
cutting is 3-1/8" (80 mm). Footplate
must be set 0° setting.
Draw lines for the opening, hold the saw
firmly, tilt it forward so that the toe of
the saw foot rests on the work, but with
the blade well clear of the work. Turn the
tool on and run at top speed, and then
very gradually lower the blade (Fig. 8).
When it touches, continue pressing
down on the toe of the saw foot slowly
pivoting the saw like a hinge until the
blade cuts through and the foot rests
flat on the work. Then saw ahead on the
cutting line. We do not recommend
plunge cutting with a scroll blade. Do
not try to plunge cut into hard materials
such as steel.
To make sharp corners, cut up to the
corner, then back up slightly before
rounding the corner. After the opening
is complete, go back to each corner and
cut it from the opposite direction to
square it off.
Temperature-dependent
Overload Protection
In normal conditions of use, the tool
cannot be overloaded. However, if the
power tool is overloaded or not kept
within the
temperature range, the speed is
reduced or the power tool switches off.
If the tool speed is automatically
reduced in such situations, the tool will
run again at full speed once the
permitted battery temperature is
reached or the load is reduced. During
automatic shut-down, switch off the
power tool, allow the battery to cool
Operating Instructions
FIG. 8
permitted battery
down, and then switch the power tool
back on. (Fig. 1)
Temperature-dependent
Overload Protection
Indicator
The red LED indicator will help you in
protecting
overheating and the motor against
overloading. (Fig. 1)
When the LED indicator continuously
lights up red, it means that the
temperature of the battery is too high
and the tool switches off automatically.
– Switch the power tool off.
– Allow the battery to cool down before
continuing to work.
When the LED indicator flashes red, it
means the tool's plunger mechanism
has been stopped by the workpiece and
the tool switches off automatically.
– Remove the tool from the workpiece.
– As soon as the plunger mechanism
has been freed, the tool will continue
to work at the set stroke rate.
Restart Protection
The restart protection feature prevents
uncontrolled starting of the machine
after a power failure. Once the restart
protection feature is active, the
temperature
indicator blinks continuously. (Fig. 1)
To restart the operation, switch the
On/Off switch to the Off position and
start the tool again.
Note: When switching off and on again
very quickly, it is possible that the
restarting protection will be triggered;
this will prevent the power tool from
starting, even though the On/Off switch
is actuated. Set the On/Off switch to
the off position, and then switch the
tool on again.
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the battery
overload protection
against