Challenge JS80JD - Operating Instructions; Fitting the Saw Blade; Operating the Trigger Switch; Using the Jigsaw

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OPERATING INSTRUCTIONS
Fitting the Saw Blade
To fit saw blades first raise the safety
guard (5) (if lowered). Use the hex
wrench (10) provided to loosen the
mounting block set screws (4) on the
mounting block (the hex key is located
at the base of the dust extractor
outlet). The blade’s cutting edge
should be facing forward. Insert the
blade’s mounting section into the
Groove in the mounting block and in the small notch in the blade stock until it
touches the bottom of the clip. Then firmly tighten the set screw.
Note: Loose set screws may cause damage to the blade. Tighten the
screws regularly and ensure that the plunger groove is clear and free of
sawdust so that proper blade mounting and set screw clamping can be
achieved.
Hex Key Storage
The hex key (10) is stored at the base of the jigsaw, please return here when
not in use.
Operating the Trigger Switch
To operate the Jigsaw, depress the trigger switch (2). If you wish to use the
Jigsaw continuously, the trigger lock button (1) can be pushed in after the trigger
switch has been depressed. To release the lock button simply push in the trigger
switch.
Using the Jigsaw
Before using the saw and connecting the mains cable make sure the trigger
switch is in the (OFF) position and the safety guard is down. Press the trigger
switch and wait until blade has reached maximum speed. Place the front of the
base plate on the workpiece and line up the cutting line with the line you wish to
cut. Push slowly forward. Keep the base plate flat against the workpiece.
Cutting Metal
An appropriate cutting agent (such as spindle oil, small amounts of soapy water,
etc.) should always be used. If there is no available liquid cutting agent, grease
can be applied to the back surface of the material to be cut.
Cutting Grooves/window Holes
For wood: Align the blade direction with the grain of the wood. Then position the
rounded part at the front of the base plate on surface to be cut, and then slowly
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lower the saw into material at chosen point of entry. Lower the saw in a pivoting
action until the blade has cut through and base plate is lying flat on material.
For other materials: In materials other than wood when cutting window holes,
firstly use one or similar tool to drill a hole from which initial cutting will begin.
Angular Cutting
For adjustment of the angle of
inclination, loosen the two Allen screws
on the base of saw, see left diagram.
Move the base plate forward or
backwards until the vertical slots in the
base plate align with the two Allen
screws, you will then be able to rotate
the base plate to the required angle.
Angle of inclination numbers is stamped
onto the curved bracket on top of the
base plate to help you set the correct
angle. Check the roller support before
tightening. Firmly tighten the two bevel
setting screws when finished.
Variable Speed Control
Adjust the thumb-wheel to increase or decrease the speed according to the
material, material thickness and blade specification to be used (also possible
during no load operation).
Stroke Rate Selection:
1-2 = low stroke rate
3-4 = medium stroke rate
5-6 = high stroke rate
The stroke rate required depends upon the material and the working conditions:
fast speed to make considerable progress, but slow speed to keep a clean and
finer cut and to avoid straining the machine. Generally, finer saw blades use a
higher speed, coarser blades use a slow speed. Avoid prolonged use at very
low speeds as this may damage your Jigsaw’s motor. After working for a period
at low stroke speed, set the machine running at maximum speed without load
for approximate 3 minutes to cool down the motor.
Pendulum Action Control
The saw blade pendulum action that is adjustable in three steps makes the
optimum adaptation of sawing advance (cutting speed) possible. Cutting
performance and cut appearance of the material to be worked. For each
downward movement, the saw blade is lifted off the material which facilitates
sawdust ejection, reduces the service life of the saw blade. At the same time the
reduction fatigue-free working possible. The pendulum action switch makes
possible the adjustment of the pendulum action in three steps.