Functional Description; Sanding Operation - Makita 9902 Instruction Manual

FUNCTIONAL DESCRIPTION

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before adjusting or checking function on
the tool.
Switch action
Fig.1
CAUTION:
Before plugging in the tool, always check to see
•
that the switch trigger actuates properly and
returns to the "OFF" position when released.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
For continuous operation, pull the switch trigger and
then push in the lock button.
To stop the tool from the locked position, pull the switch
trigger fully, and then release it.
Speed adjusting dial
For 9903, 9920 and 9404
Fig.2
The belt speed can be infinitely adjusted between 210 m
and 440 m per minute by turning the speed adjusting dial
to a given number setting from 1 to 5. Higher speed is
obtained when the dial is turned in the direction of
number 5; lower speed is obtained when it is turned in
the direction of number 1.
Select the proper speed for the workpiece to be sanded.
CAUTION:
If the tool is operated continuously at low speeds
•
for a long time, the motor will get overloaded,
resulting in tool malfunction.
The speed adjusting dial can be turned only as far
•
as 5 and back to 1. Do not force it past 5 or 1, or
the speed adjusting function may no longer work.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the tool.
Installing or removing abrasive belt
Fig.3
Pull the lever all the way out and install the belt over the
rollers, and then return the lever to the original position.
CAUTION:
When installing the belt, make sure that the
•
direction of the arrow on the back of the belt
corresponds to the one on the tool itself.
Fig.4
Adjusting belt tracking
more than 6mm
004230
Switch on the tool and make sure that the belt is aligned
properly. If the edge of the belt extends beyond the edge
of the base or the edge of the belt retracts more than 6
mm away from the edge of the base, use the adjusting
knob to adjust the belt tracking.
Dust bag
Fig.5
Attach the dust bag onto the dust spout. The dust spout
is tapered. When attaching the dust bag, push it onto the
dust spout firmly as far as it will go to prevent it from
coming off during operation.
Fig.6
When the dust bag is about half full, remove the dust
bag from the tool and pull the fastener out. Empty the
dust bag of its contents, tapping it lightly so as to remove
particles adhering to the insides which might hamper
further collection.
NOTE:
If you connect a Makita vacuum cleaner to this tool,
•
more efficient and cleaner operations can be
performed.
Connecting to Makita vacuum cleaner
Fig.7
Cleaner sanding operations can be performed by
connecting the belt sander to Makita vacuum cleaner.
When connecting to Makita vacuum cleaner, an optional
hose 28 mm in inner diameter is necessary.
OPERATION

Sanding operation

Fig.8
CAUTION:
The tool should not be in contact with the
•
workpiece surface when you turn the tool on or off.
Otherwise a poor sanding finish or damage of the
belt may result.
Hold the tool firmly with both hands. Turn the tool on and
wait until it attains full speed. Then gently place the tool
on the workpiece surface. Keep the belt flush with the
workpiece at all times and move the tool back and forth.
Never force the tool. The weight of the tool applies
adequate pressure. Excessive pressure may cause
stalling, overheating of the motor, burning of the
5
1. Steel plate
1
2. Adjusting knob
2