Starting Operation - Master BS 28-A Combi Bedienungsanleitung

Charge-control Indicator
The battery 9 is fitted with a charge-control indica-
tor 11. It indicates the charge of the battery at any given
time during the working process.
By pressing the button 10, the battery charge can also
be checked when the battery has been removed, or
when the machine is at a standstill (machine must be
switched off for at least 1 minute). After approx. 4 sec-
onds the battery charge display automatically turns off.
When the first display element begins to flash (0 – 10 %)
the battery is almost empty and must be recharged.
Auxiliary Handle (figure B)
Operate the machine only with the auxiliary
handle 2.
Loosen the handle by turning to the left. Rotate the aux-
iliary handle 2 and adapt to the working position.
Afterwards tighten the handle again by turning in clock-
wise direction.
Drill Spindle Locking
For the easy and quick changing of the tools or the drill
chuck, the machine has a drill spindle locking device
which eliminates the need to hold the drill spindle by
hand or with a tool.
Inserting the tool (figure C)
For this purpose, Open chuck, insert the selected bit and
tighten chuck. After the clamping jaws have tightened
around the tool shaft, turn the chuck a further 1/4 in or-
der to let the chucking power retention engage (pos. ;
1x click).
Only than can the tool itself be chucked by vigorously
turning the sleeve in the "
gages audibly with a grating noise (pos.
Remove the tool
Open the chuck by turning the sleeve in the "AUF, RE-
LEASE " direction.
In case of strong tension at the chuck steady the chuck
head with a fork wrench and loosen the sleeve by hand
with a strong jerk.

Starting Operation

Inserting the Battery
Use only original Würth lithium ion batteries with
the voltage listed on the nameplate of your power
tool.
Set the rotational direction switch 6 to the centre posi-
tion = lock-off and allow the charged battery 9 to en-
gage into the handle.
GRIP,ZU" direction (it en-
)).
Reversing the Rotational Direction
a
b
a
Right Rotation ( )
Push the rotational direction switch left to the stop (for
screwing in screws).
Left Rotation ( )
b
Push the rotational direction switch right to the stop
(loosening or unscrewing screws).
The rotational direction may only be reversed when
the machine is at a standstill!
Switching On and Off
To start the machine, press the On/Off switch 7 and
keep it depressed.
The machine runs with variable speed between 0 and
maximum, depending on the pressure applied to the
On/Off switch 7. Light pressure on the On/Off
switch 7 results in low rotational speed, thus allowing
smooth, controlled starts. Further pressure on the switch
results in an increase in speed.
To switch off the machine, release the On/Off
switch 7.
Setting the Torque (figure D)
Carry out a practical test to determine with which of the
20 settings of the torque setting ring 3 the screws are
driven flush into the material.
Low setting, e. g., small screws, soft materi-
1
als.
High setting, e. g., large screws, hard mate-
20
rials.
Safety clutch deactivated, e. g., for drilling
and unscrewing screws.
When the torque setting is correctly adjusted, the safety
clutch disengages as soon as the screw is driven flush
into the material, or when the set torque is reached. For
unscrewing, select a higher torque setting or set the
symbol to " ".
Gear Selector Switch
Two speed ranges can be pre-selected with the gear se-
lector switch 4:
1st gear: Low speed range
1
2nd gear: High speed range
2
The rotational direction may only be reversed when
the machine is at a standstill!
The rotational direction
switch 6 is used to reverse
the rotational direction of the
machine. However, this is not
possible with the On/Off
switch 6 pressed.
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