Bosch GWS 24-230 JVX Professional - Manual (Page 21)

22 | English
1 609 92A 0B2 | (1.8.13) Bosch Power Tools
Rotating the Main Handle
 Before any work on the machine itself, pull the mains
plug.
The main handle 26 can be rotated with respect to the ma-
chine housing toward the left or right in steps of 90°. In this
manner, the On/Off switch can be brought into a more con-
venient position for special working situations, e.g., for cut-
ting operations using the cutting guide with dust extraction
protection guard 22 or for left-handed persons.
Press the handle unlocking button 27 in the direction of the
arrow and at the same time turn the main handle 26 to the re-
quested position until it latches.
Dust/Chip Extraction
 Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one’s health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suita-
ble for the material.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
When operating the machine with power from mobile genera-
tors that do not have sufficient reserve capacity or are not
equipped with suitable voltage control with starting current
amplification, loss of performance or untypical behavior can
occur upon switching on.
Please observe the suitability of the power generator being
used, particularly with regard to the mains voltage and fre-
quency.
Switching On and Off
To start the power tool, press the On/Off switch 3 forward
and then down.
To lock-on the pressed On/Off switch 3, push the On/Off
switch 3 further forward.
To switch off the power tool, release the On/Off switch 3, or
when it is locked, briefly press the On/Off switch 3 and then
release it.
To save energy, only switch the power tool on when using it.
Switch Version without Lock-on (country-specific):
To start the power tool, press the On/Off switch 3 forward
and then down.
To switch off the machine, release the On/Off switch 3.
 Check grinding tools before using. The grinding tool
must be mounted properly and be able to move freely.
Carry out a test run for at least one minute with no load.
Do not use damaged, out-of-centre or vibrating grind-
ing tools. Damaged grinding tools can burst and cause in-
juries.
Run-on Brake
The power tool is equipped with the Bosch
Brake System, a patented electromechani-
cal run-on brake.
When switching off or when the power sup-
ply is interrupted, the machine comes to a
complete stop within a few seconds. This
means a reduction of the run-on time of approx. 70 % when
compared with angle grinders without run-on brake, which al-
lows for the power tool to be placed down sooner.
Note: When the braking effect decreases noticeably, the run-
on brake has failed. The power tool should be sent immediate-
ly to an after-sales service (for addresses, see section “After-
sales Service and Application Service”.
Restarting Protection (3 601 H64 U..)
The restarting protection feature prevents uncontrolled re-
starting of the machine after an interruption in the power sup-
ply.
To restart the operation, switch the On/Off switch 3 to the
Off position and start the machine again.
Reduced starting current
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Note: When the machine runs at full speed immediately after
switching on, the reduced starting current and the restarting
protection have failed. The power tool should be sent imme-
diately to an after-sales service (for addresses, see section
“After-sales Service and Application Service”.
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