Electronic Function - Makita GA4590 Instruction Manual

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.4: 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.5: 1. Slide switch

Electronic function

Active Feedback sensing Technology
CAUTION:
Hold the tool firmly until the rota-
tion stops.
The tool electronically detects situations where the
wheel or accessory may be at risk to be bound. In such
situation, the tool automatically shuts off the power to
prevent further rotation of the spindle (this does not
prevent kickback).
At this time, the indication lamp blinks in red and shows
the Active Feedback sensing Technology is working.
To restart the tool, switch off the tool first, remove the
cause of sudden drop in the rotation speed, and then
turn the tool on.
Accidental re-start preventive
function
When plugging in the tool while the switch is ON, the
tool does not start.
At this time, the indication lamp blinks in red and shows
that the accidental re-start preventive function works.
To start the tool, turn off the switch, and turn it on again.
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.
Mechanical brake
Only for model GA4591 / GA5091
Mechanical brake is activated after the tool is switched
off.
The brake does not work when the power supply is shut
down with the switch still on.
ASSEMBLY
CAUTION:
Always be sure that the tool is
switched off and unplugged before carrying out
any work on the tool.
Installing side grip (handle)
CAUTION:
Always be sure that the side grip is
installed securely before operation.
Screw the side grip securely on the position of the tool
as shown in the figure.
► Fig.6
Installing or removing wheel guard
WARNING:
flap disc, flex wheel or wire wheel brush, the wheel
guard must be fitted on the tool so that the closed side
of the guard always points toward the operator.
WARNING:
securely locked by the lock lever with one of the
holes on the wheel guard.
WARNING:
/ diamond wheel, be sure to use only the special
wheel guard designed for use with cut-off wheels.
For depressed center wheel, flap disc,
flex wheel, wire wheel brush / abrasive
cut-off wheel, diamond wheel
1. While pushing the lock lever, mount the wheel
guard with the protrusions on the wheel guard aligned
with the notches on the bearing box.
► Fig.7: 1. Lock lever 2. Notch 3. Protrusion
2. While pushing the lock lever toward A, hold down
the portions B of the wheel guard as shown in the figure.
► Fig.8: 1. Wheel guard 2. Hole
NOTE: Push down the wheel guard straight.
Otherwise, you cannot secure the wheel guard.
3.
While pushing the lock lever toward A, rotate the wheel
guard toward C, and then, change the angle of the wheel
guard according to the work so that the operator can be pro-
tected. Align the lock lever with one of the holes in the wheel
guard, and then release the lock lever to lock the wheel guard.
► Fig.9: 1. Wheel guard 2. Hole
To remove wheel guard, follow the installation proce-
dure in reverse.
Clip-on cutting wheel guard attachment
Optional accessory
NOTE: For cutting-off operations, a clip-on cutting
wheel guard attachment can be used with the wheel
guard (for grinding wheel).
Not available in some countries.
► Fig.10
14 ENGLISH
When using a depressed center wheel,
Make sure that the wheel guard is
When using an abrasive cut-off