Functional Description; Overload Protection; Overheat Protection - Makita GA4590 Betriebsanleitung

20. Do not use cloth w ork gloves during operation.
Fibers from cloth gloves may enter the tool, which
c a u s e s t o o l b r e a k a g e .
21. Before operation, make sure that there is no
buried object such as electric pipe, w ater pipe
or gas pipe in the w orkpiece. Otherwise, it may
c a u s e a n e l e c t r i c s h o c k , e l e c t r i c a l l e a k a g e o r g a s
l e a k .
22. If a blotter is attached to the w heel, do not
remove it. The diameter of the blotter must be
larger than the lock nut, outer ange, and inner
ange.
2 3 . Before installing a grinding w heel, al w ays
check that the blotter part does not have any
abnormalities such as chips or cracks.
2 4 . Tighten the lock nut properly. O v e r t i g h t e n i n g
the wheel can cause breakage and insu cient
tightening can cause fluttering.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity
w ith product (gained from repeated use) replace
strict adherence to safety rules for the subject
product. MISUSE or failure to follo w the safety
rules stated in this instruction manual may cause
serious personal injury.
FUNCTIONAL
DESCRIPTION
CAUTION:
Al w ays be sure that the tool is
switched o 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 o power to the
motor to extend tool life. The tool will automatically
r e d u c e p o w e r o r s t o p d u r i n g o p e r a t i o n i f t h e t o o l i s
placed under one of the following conditions:

Overload protection

W h e n t h e t o o l i s o p e r a t e d i n a m a n n e r t h a t c a u s e s i t
to draw an abnormally high current, the tool reduces
power automatically without any indication. In this
s i t u a t i o n , r e m o v e t h e c a u s e o f t h e o v e r l o a d s o t h a t t h e
r o t a t i o n s p e e d r e c o v e r e d .

Overheat protection

Country specific
W h e n t h e t o o l i s o v e r h e a t e d , t h e t o o l s t o p s a u t o m a t -
ically and the indication lamp blinks in red. In this
s i t u a t i o n , l e t t h e t o o l c o o l d o w n . Y o u c a n t u r n t h e t o o l
o n a g a i n a f t e r t h e l a m p c h a n g e s t h e c o l o r f r o m
g r e e n .
Indication lamp
Fig.1: 1. I n d i c a t i o n l a m p
T h e i n d i c a t i o n l a m p l i g h t s u p g r e e n w h e n t h e t o o l i s
p l u g g e d .
I f t h e i n d i c a t i o n l a m p b l i n k s i n r e d , t h e o v e r h e a t p r o -
tection, Active Feedback sensing Technology, or the
a c c i d e n t a l r e - s t a r t p r e v e n t i v e f u n c t i o n s t o p s o p e r a t i o n .
In this situation, switch o the tool. Then, turn the tool
o n t o r e s t a r t .
If the indication lamp lights up in red after switch o the
t o o l , t h e t o o l i s o v e r h e a t e d . I n t h i s s i t u a t i o n , c o o l d o w n
t h e t o o l a n d w a i t u n t i l t h e i n d i c a t i o n l a m p l i g h t s u p i n
g r e e n .
Speed adjusting dial
Only for model GA4590 / GA4591 / GA5090 / GA5091
CAUTION:
at lo w speeds for a long time, the motor w ill get
overloaded and heated up.
CAUTION:
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 w ork.
The rotating speed can be changed by turning the
speed adjusting dial to a given number setting from 1 to
5. H i g h e r s p e e d i s o b t a i n e d w h e n t h e d i a l i s t u r n e d i n
t h e d i r e c t i o n o f n u m b e r 5. A n d l o w e r s p e e d i s o b t a i n e d
when it is turned in the direction of number 1. Refer to
t h e b e l o w t a b l e f o r t h e r e l a t i o n s h i p b e t w e e n t h e n u m b e r
s e t t i n g s o n t h e d i a l a n d t h e a p p r o x i m a t e r o t a t i n g s p e e d .
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
t h e t o o l d a m a g e .
P r e s s t h e s h a f t l o c k t o p r e v e n t s p i n d l e r o t a t i o n w h e n
i n s t a l l i n g o r r e m o v i n g a c c e s s o r i e s .
Fig.3: 1. S h a f t l o c k
r e d t o
13 ENGLISH
If the tool is operated continuously
The speed adjusting dial can be
Rated speed
-1
2, 800 m i n (/min)
-1
4 , 500 m i n (/min)
-1
6 , 500 m i n (/min)
-1
8, 000 m i n (/min)
-1
11, 500 m i n (/min)
Never actuate the shaft lock w hen