Bosch Professional GWS 1000 Manual Original página 21

OBJ_BUCH-310-006.book Page 21 Monday, March 26, 2012 2:15 PM
Rotating the Machine Head
Before any work on the machine itself, pull the mains
plug.
guard 20 or for left-handed persons.
Completely unscrew the four screws. Rotate the machine
head carefully, without removing it from the housing, to the
new position. Screw in and tighten the four screws again.
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.
Bosch Power Tools
Switching On and Off
To start the power tool, push the On/Off switch 3 forwards.
To lock the On/Off switch 3, press the On/Off switch 3 down
at the front until it latches.
The machine head can be
rotated with respect to To switch off the power tool, release the On/Off switch 3 or,
the machine housing in if it is locked, briefly push down the back of the On/Off switch
90° steps. In this man- 3 and then release it.
ner, the On/Off switch
Check grinding tools before using. The grinding tool
can be brought into a
must be mounted properly and be able to move freely.
more convenient posi-
Carry out a test run for at least one minute with no load.
tion for special working
Do not use damaged, out-of-centre or vibrating grind-
situations, e. g., for cut-
ing tools. Damaged grinding tools can burst and cause in-
ting operations using the
juries.
cutting guide with dust
When not using the power tool, switch it off in order to save
extraction protection
energy.
Reduced starting current (GWS 1100/GWS 1400)
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Constant Electronic Control (GWS 1100/GWS 1400)
Constant electronic control holds the speed constant at no-
load and under load, and ensures uniform working perform-
ance.
Working Advice
Exercise caution when cutting slots in structural walls;
see Section "Information on Structures ".
Clamp the workpiece if it does not remain stationary
due to its own weight.
Do not strain the machine so heavily that it comes to a
standstill.
After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the acces-
sory.
Do not touch grinding and cutting discs before they
have cooled down. The discs can become very hot while
working.
Do not use the power tool with a cut-off stand.
Rough Grinding
Never use a cutting disc for roughing.
The best roughing results are achieved when setting the ma-
chine at an angle of 30° to 40°. Move the machine back and
forth with moderate pressure. In this manner, the workpiece
will not become too hot, does not discolour and no grooves
are formed.
Flap Disc
With the flap disc (accessory), curved surfaces and profiles
can be worked.
Flap discs have a considerably higher service life, lower noise
levels and lower sanding temperatures than conventional
sanding sheets.
English | 21
1 609 929 Y16 | (26.3.12)