Electronic Function - Makita DHR280 Instruction Manual

Hammering only
For chipping, scaling or demolition operations, rotate
the action mode changing knob to the
bull point, cold chisel, scaling chisel, etc.
► Fig.11: 1. Hammering only
Hook
CAUTION:
Never hook the tool at high loca-
tion or on potentially unstable surface.
► Fig.12: 1. Hook
The hook is convenient for temporarily hanging the tool.
To use the hook, simply lift up hook until it snaps into
the open position. When not in use, always lower hook
until it snaps into the closed position.
Adjusting the nozzle position of the
dust collection system
Optional accessory
Push in the guide while pushing up the guide adjust-
ment button, and then release the button at the desired
position.
► Fig.13: 1. Guide 2. Guide adjustment button
NOTE: Before adjusting the nozzle position, release
the nozzle forward completely by pushing up the
guide adjustment button.
If a long drill bit is installed, extend the guide by pushing
up the extension button.
► Fig.14: 1. Extension button
Adjusting the drilling depth of the
dust collection system
Optional accessory
Slide the depth adjustment button to the desired posi-
tion while pushing it up. The distance (A) is the drilling
depth.
► Fig.15: 1. Depth adjustment button
Torque limiter
NOTICE:
As soon as the torque limiter actuates,
switch off the tool immediately. This will help pre-
vent premature wear of the tool.
NOTICE:
Drill bits such as hole saw, which tend
to pinch or catch easily in the hole, are not appro-
priate for this tool. This is because they will cause
the torque limiter to actuate too frequently.
The torque limiter will actuate when a certain torque
level is reached. The motor will disengage from the
output shaft. When this happens, the drill bit will stop
turning.

Electronic function

The tool is equipped with the electronic functions for
symbol. Use a
easy operation.
•
•
NOTE: This function does not work if the acceleration does
not reach the predetermined one when the tool is swung.
NOTE: If the bit is swung at the predetermined acceler-
ation during chipping, scaling, or demolishing, the motor
is forcibly stopped. In this case, release the switch trig-
ger, and then pull the switch trigger to restart the tool.
ASSEMBLY
CAUTION:
switched off and the battery cartridge is removed
before carrying out any work on the tool.
Side grip (auxiliary handle)
CAUTION:
safe operation.
CAUTION:
grip, make sure that the side grip is firmly secured.
To install the side grip, follow the steps below.
1.
► Fig.16: 1. Thumb screw
2.
screw so that the grooves on the grip fit in the protru-
sions on the tool barrel.
► Fig.17: 1. Thumb screw
3.
grip can be fixed at desired angle.
Grease
Coat the shank end of the drill bit beforehand with a
small amount of grease (about 0.5 - 1 g).
This chuck lubrication assures smooth action and lon-
ger service life.
Installing or removing drill bit
Clean the shank end of the drill bit and apply grease
before installing the drill bit.
► Fig.18: 1. Shank end 2. Grease
Insert the drill bit into the tool. Turn the drill bit and push
it in until it engages.
After installing the drill bit, always make sure that the
drill bit is securely held in place by trying to pull it out.
► Fig.19: 1. Drill bit
16 ENGLISH
Constant speed control
The speed control function provides the constant
rotation speed regardless of load conditions.
Active Feedback sensing Technology (For
DHR282/DHR283)
If the tool is swung at the predetermined accelera-
tion during operation, the motor is forcibly stopped
to reduce the burden on the wrist.
Always be sure that the tool is
Always use the side grip to ensure
After installing or adjusting the side
Loosen the thumb screw on the side grip.
Attach the side grip while pressing the thumb
Tighten the thumb screw to secure the grip. The