Bosch GWS Professional 750 Manual Original página 21

OBJ_BUCH-2565-003.book Page 22 Thursday, December 21, 2017 12:00 PM
22 | English
Rotating the Machine Head
 Before any work on the machine itself, pull the mains
plug.
without removing it from the housing, to the new position.
Screw in and tighten the four screws again.
Dust/Chip Extraction
 Dust 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 dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
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. Dust 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.
Products sold in AUS and NZ only: Use a residual current de-
vice (RCD) with a rated residual current of 30 mA or less.
 Hold power tool by insulated gripping surfaces 21 and
auxiliary handle 3 only. The accessory may contact hid-
den wiring or its own cord. Accessory contacting a "live"
wire may make exposed metal parts of the power tool "live"
and shock the operator.
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.
1 609 92A 48B | (21.12.17)
Please observe the suitability of the power generator being
used, particularly with regard to the mains voltage and fre-
quency.
Switching On and Off
The machine head can be
rotated with respect to To start the power tool, push the On/Off switch 2 forwards.
the machine housing in
To lock the On/Off switch 2, press the On/Off switch 2 down
90° steps. In this man-
at the front until it latches.
ner, the On/Off switch
To switch off the power tool, release the On/Off switch 2 or,
can be brought into a
if it is locked, briefly push down the back of the On/Off switch
more convenient posi-
2 and then release it.
tion for special working
 Check grinding tools before using. The grinding tool
situations, e.g. for left-
must be mounted properly and be able to move freely.
handed persons.
Carry out a test run for at least one minute with no load.
Completely unscrew the
Do not use damaged, out-of-centre or vibrating grind-
four screws. Rotate the
ing tools. Damaged grinding tools can burst and cause in-
machine head carefully,
juries.
To save energy, only switch the power tool on when using it.
Kickback stop (GWS 750-100 I)
Restarting Protection (GWS 700/GWS 710(115)/
GWS 750/GWS 750-100 I, GWS 750 S)
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 2 to the
Off position and start the machine again.
Reduced starting current (GWS 750-100 I, GWS 750 S)
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
In case of a sudden drop in speed, e.g.,
caused by a jammed disc while cutting, the
power supply to the motor is electronically
interrupted.
To restart the operation, switch the On/Off
switch 2 to the Off position and start the ma-
chine again.
Bosch Power Tools