Starting Operation; Working Advice - Bosch HWS Serie Manual Original

OBJ_BUCH-2482-003.book Page 21 Friday, December 9, 2016 12:33 PM
– Reinsert plug insert 15 into the housing of the CEE plug 18
and tighten both screws 16 again.
– Afterwards, check the proper function of the protective
conductor.
– Insert the CEE plug 18 of the power tool into the connec-
tion socket of the frequency converter.
Now, connect the frequency converter to the power supply.
For information on how to connect the frequency converter to
the power supply, see the frequency converter operating in-
structions.
 Afterwards, check the rotation direction!
Checking the Rotation Direction
The rotation direction of the grinder spindle must correspond
with the arrow on the power tool.
If the grinder spindle rotates in the wrong direction when put-
ting into operation for the first time (see "Switching the Power
Tool On/Off", page 21), switch the power tool off immediate-
ly and disconnect it from the power supply.
– Loosen the two screws 16 again and pull the plug insert 15
out of the plug housing of the CEE plug 18.
– Loosen the conductor ferrules of the black and brown con-
ductors from their contact tubes.
– Now, insert the conductor ferrule of the black conductor
L3 into contact tube L1, and the conductor ferrule of the
brown conductor L1 into contact tube L3.
– Firmly tighten the small screws 17 in the plug insert 15 to
affix the conductors.
– Reinsert plug insert 15 into the housing of the CEE plug 18
and tighten both screws 16 again.
– Afterwards, check the proper function of the protective
conductor.
– Reconnect the power tool to the power supply.
Operation

Starting Operation

 The voltage and frequency of the power source must
correspond with the data on the type plate of the power
tool.
 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.
 If the machine should unexpectedly stop operating
even though the On/Off switch 1 is in the "On" position,
set the On/Off switch to "Off". This will prevent uncon-
trolled restarting of the machine. Before restarting the ma-
chine, check the power supply (see "Connection to the
Power Supply", page 20).
 Always connect the power tool to the frequency con-
verter first, before connecting the frequency convert-
er to the mains supply.
To save energy, only switch the power tool on when using it.
Bosch Power Tools
Switching the Frequency Converter On/Off
The frequency converter must be put into operation first be-
fore actuating the power tool.
For this, observe the operating instructions of the frequency
converter.
Switching the Power Tool On/Off
with Safety Switch (see figure E)
– To start the power tool, press the On/Off switch 1 forward
and then down.
– To lock-on the pressed On/Off switch 1, push the On/Off
switch 1 further forward.
– To switch off the power tool, release the On/Off switch 1,
or when it is locked, briefly press the On/Off switch 1 and
then release it.

Working Advice

 Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
 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.
Sanding with the 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.
Cutting Metal (see figure F)
 For cutting with bonded abrasives, always use a pro-
tection guard for cutting.
When cutting, work with moderate feed, adapted to the mate-
rial being cut. Do not exert pressure onto the cutting disc, tilt
or oscillate the machine.
Do not reduce the speed of running down cutting discs by ap-
plying sideward pressure.
The machine must always work in an up-grinding motion. Oth-
erwise, the danger exists of it being pushed uncontrolled out
of the cut.
When cutting profiles and square bar, it is best to start at the
smallest cross section.
1 609 92A 36N | (9.12.16)
English | 21