Makita JR3020, Instruction Manual

Page: 6 / 40

6
Switch action (Fig. 7, 8 & 9)
CAUTION:
Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.
For tools with lock button
To start the tool, simply pull the trigger. Tool speed is
increased by increasing pressure on the trigger. Release
the trigger to stop.
Tool speed can be adjusted by turning the speed change
knob. When the portion with
v
mark is positioned
adjacent to the pointer, faster speed can be obtained by
turning the knob clockwise.
When the portion with
w
mark is positioned adjacent
to the pointer, full speed can be obtained.
Continuous operation can be performed only when the
knob is set to the full speed position. To perform continu-
ous operation, pull the trigger fully and then push the lock
button up. To stop the tool from the locked position, pull
the trigger fully, then release it.
For tools with lock-off button
To prevent the trigger from being accidentally pulled, a
lock-off button is provided. To start the tool, push the
lock-off button up and pull the trigger. Tool speed is
increased by increasing pressure on the trigger. Release
the trigger to stop.
Tool speed can be adjusted by turning the speed change
knob. When the portion with
v
mark is positioned
adjacent to the pointer, faster speed can be obtained by
turning the knob clockwise.
When the portion with
w
mark is positioned adjacent
to the pointer, full speed can be obtained.
Operation (Fig. 10)
Press the shoe firmly against the workpiece. Do not allow
the tool to bounce. Bring the blade into light contact with
the workpiece. First, make a pilot groove, using a slower
speed. Then use a faster speed to continue cutting.
CAUTION:
• Always use a suitable coolant (cutting oil) when cut-
ting metal. Failure to do so will cause premature
blade wear.
• Always wear gloves to protect your hands from hot
flying chips when cutting metal.
• Always press the shoe firmly against the workpiece
during operation. If the shoe is held away from the
workpiece during operation, strong vibration and/or
twisting will be produced, causing the blade to snap
dangerously.
• Be sure to always wear suitable eye protection
which conforms with current national standards.
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Replacement of carbon brushes (Fig. 11 & 12)
Replace carbon brushes when they are worn down to the
limit mark. Both identical carbon brushes should be
replaced at the same time.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Centre.
Position Cutting action Applications
0
Straight line cutting action For cutting mild steel, stainless steel and plastics.
For clean cuts in wood and plywood.
I
Small orbit cutting action For cutting mild steel, aluminum and hard wood.
II
Medium orbit cutting action For cutting wood and plywood.
For fast cutting in aluminum and mild steel.
III
Large orbit cutting action For fast cutting in wood and plywood.