Functional Description - Makita GA4590 Instruction Manual

20. Do not use cloth work gloves during operation.
Fibers from cloth gloves may enter the tool, which
causes tool breakage.
21. 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.
22. If a blotter is attached to the wheel, do not
remove it. The diameter of the blotter must be
larger than the lock nut, outer flange, and inner
flange.
23. Before installing a grinding wheel, always
check that the blotter part does not have any
abnormalities such as chips or cracks.
24. Tighten the lock nut properly. Overtightening
the wheel can cause breakage and insufficient
tightening can cause fluttering.
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.
Tool protection system
The tool is equipped with a tool protection system. This
system automatically reduces or cuts off power to the
motor to extend tool life. The tool will automatically
reduce power or stop during operation if the tool is
placed under one of the following conditions:
Overload protection
When the tool is operated in a manner that causes it
to draw an abnormally high current, the tool reduces
power automatically without any indication. In this
situation, remove the cause of the overload so that the
rotation speed recovered.
Overheat protection
Country specific
When the tool is overheated, the tool stops automat-
ically and the indication lamp blinks in red. In this
situation, let the tool cool down. You can turn the tool
on again after the lamp changes the color from red to
green.
Indication lamp
► Fig.1: 1. Indication lamp
The indication lamp lights up green when the tool is plugged.
If the indication lamp blinks in red, the overheat pro-
tection, Active Feedback sensing Technology, or the
accidental re-start preventive function stops operation.
In this situation, switch off the tool. Then, turn the tool
on to restart.
If the indication lamp lights up in red after switch off the
tool, the tool is overheated. In this situation, cool down
the tool and wait until the indication lamp lights up in
green.
Speed adjusting dial
Only for model GA4590 / GA4591 / GA5090 / GA5091
CAUTION:
If the tool is operated continuously
at low speeds for a long time, the motor will get
overloaded and heated up.
CAUTION:
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.
The rotating speed can be changed 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. And lower speed is obtained
when it is turned in the direction of number 1. Refer to
the below table for the relationship between the number
settings on the dial and the approximate rotating speed.
Number
1
2
3
4
5
► Fig.2: 1. Speed adjusting dial
Shaft lock
WARNING:
the spindle is moving. It may cause serious injury or
the tool damage.
Press the shaft lock to prevent spindle rotation when
installing or removing accessories.
► Fig.3: 1. Shaft lock
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.
13 ENGLISH
Rated speed
-1
2,800 min (/min)
-1
4,500 min (/min)
-1
6,500 min (/min)
-1
8,000 min (/min)
-1
11,500 min (/min)
Never actuate the shaft lock when