Functional Description - Makita GA5080 Instruction Manual

Additional Safety Warnings:
1. When using depressed centre grinding wheels,
be sure to use only fiberglass-reinforced
wheels.
2. NEVER USE Stone Cup type wheels with this
grinder. This grinder is not designed for these
types of wheels and the use of such a product
may result in serious personal injury.
3. Be careful not to damage the X-LOCK holder.
Damage to the parts could result in wheel
breakage.
4. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
Before using the tool on an actual workpiece,
5.
let it run for a while. Watch for vibration or
wobbling that could indicate poor installation
or a poorly balanced wheel.
6. Use the specified surface of the wheel to per-
form the grinding.
Do not leave the tool running. Operate the tool
7.
only when hand-held.
8. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.
9. Do not touch accessories immediately after
operation; it may be extremely hot and could
burn your skin.
10. Observe the instructions of the manufacturer
for correct mounting and use of wheels.
Handle and store wheels with care.
11. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive wheels.
12. Check that the workpiece is properly
supported.
13. Pay attention that the wheel continues to
rotate after the tool is switched off.
14. If working place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure opera-
tor safety.
15. Do not use the tool on any materials contain-
ing asbestos.
16. When use cut-off wheel, always work with
the dust collecting wheel guard required by
domestic regulation.
17. Cutting discs must not be subjected to any
lateral pressure.
18. Do not use cloth work gloves during operation.
Fibers from cloth gloves may enter the tool, which
causes tool breakage.
19. Before operation, make sure that there is no
buried object such as electric pipe, water pipe
or gas pipe in the workpiece. Otherwise, it may
cause an electric shock, electrical leakage or gas
leak.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity
with product (gained from repeated use) replace
strict adherence to safety rules for the subject
product. MISUSE or failure to follow the safety
rules stated in this instruction manual may cause
serious personal injury.

FUNCTIONAL DESCRIPTION

CAUTION:
Always be sure that the tool is
switched off and unplugged before adjusting or
checking function on the tool.
Switch action
CAUTION:
Before plugging in the tool, always
check to see that the slide switch actuates prop-
erly and returns to the "OFF" position when the
rear end of the slide switch is depressed.
CAUTION:
Switch can be locked in the "ON"
position for ease of operator comfort during
extended use. Apply caution when locking tool in
the "ON" position and maintain firm grasp on tool.
To start the tool, press down the rear end of the slide
switch and then slide it toward the "I (ON)" position.
For continuous operation, press down the front end of
the slide switch to lock it.
► Fig.1: 1. Slide switch
To stop the tool, press down the rear end of the slide
switch so that it returns to the "O (OFF)" position.
► Fig.2: 1. Slide switch
Indication lamp
Only for model GA5080R
► Fig.3: 1. Indication lamp
The indication lamp lights up green when the tool is plugged. If the
indication lamp does not light up, the mains cord or the controller
may be defective. The indication lamp is lit but the tool does not start
even if the tool is switched on, the carbon brushes may be worn out,
or the controller, the motor or the ON/OFF switch may be defective.
Accidental re-start preventive function
Only for model GA5080R
The tool does not start with the switch being lock-on
even when the tool is plugged.
At this time, the indication lamp blinks red and shows
that the accidental re-start preventive function works.
To cancel the accidental re-start preventive function, return
the slide switch to "O (OFF)" position, then release it.
Electronic function
Constant speed control
Possible to get fine finish, because the rotating speed is
kept constant even under the loaded condition.
Soft start feature
Soft start feature reduces starting reaction.
Overload protector
When the load on the tool exceeds admissible levels,
power to the motor is reduced to protect the motor from
overheating. When the load returns to admissible lev-
els, the tool will operate as normal.
10 ENGLISH