The driver is preset to “F” full power
(digital clutch is off) and the one-shot
impact function is off when shipped
from the manufacture.
CAUTION:
When the clutch is set to 1 or 2 stage,
the impact power mode is automatically
set at “Soft” impact mode regardless of
the impact power mode select display
setting.
When the clutch is set to 3 or 4 stage,
the impact power mode is automatically
set at “Medium” impact mode even in
the “Hard” impact mode display setting.
Clutch setting and
operating impact force
Impact
Power Mode
Display
Soft Medium Hard
H
Soft Medium Medium
M
Soft Soft Soft
S
Important remarks when
using the digital clutch and
one shot impact functions
The digital clutch setting could be used
only as a guideline. The suitable setting
will vary depending on the hardness of
the material, the force being applied to the
tool, and the type of screw.
Uneven material hardness could result in
less-tightening or over-tightening depend
-
ing on the position on the material.
If the battery pack capacity is low, the
driver might not fully tighten the screws.
Usage
When driving screws into wood, use the
screws of less than 90 mm long and avoid
knots of wood materials.
Be sure to set the impact power mode
and digital clutch to match the material
and screws being used.
When selecting the digital clutch settings,
start from low to high stage while check
-
ing the setting (on a scrap piece of the
material) to determine the best setting.
Too high setting could result in over-tight
-
ening of the screws.
Depress the trigger switch fully when using
the digital clutch and/or one-shot impact
function during one period of operation.
Using low speed by trigger switch could
result in a discrepancy in work results.
When using the digital clutch, depress the
trigger switch fully until the digital clutch
operates. Do not release the switch until
the rotation stops. Releasing the switch
to stop rotation before finishing tighten
-
ing a screw could result in not being fully
tightened. (If this happens, start from the
beginning of fastening.)
Applications not recommend-
ed for these functions
Tightening screws into easily breakable
materials, such as thin plastics.
Tightening screws into lightweight steel
sheet which thickness is 0.8 mm or less.
Tightening TEKS screws into soft surface
materials, such as interior finishing mate
-
rials.
Reason: The impact function is a
mechanical sideway impact. The tight
-
ening torque increases instantly step by
step when the hammer impacts. There
-
fore, fastening torque of impact driver is
not generally increased as a drill driver.
(The accuracy also varies depending on
the material.)
Tightening time
Number of impacts
Impact torque curve
Tightening torque (load)
Drill driver torque increase.
Setting value
Impact torque curve
To control the tightening torque for screws
and bolts during factory manufacturing
and assembly.
Reason: The digital clutch uses a sen-
sor and microcomputer to deduce the load
from the number of motor rotation between
impacts and then stop the rotation when
the load reaches to the set clutch load. To
deduce this load requires at least 4 or 5
impacts, This is not suitable for materials
which requires a low tightening load, as
impact may not occur 4 or 5 times.
