Working Advice - BTI PROFILINE WKS W230 E Manual Original

Restarting Protection
The restarting protection feature prevents uncon-
trolled restarting of the machine after an interruption in
the power supply.
To restart the operation, switch the On/Off switch
2 to the Off position and start the machine again.
Reduced starting current
The electronic reduced starting current limits the
power consumption when switching the tool on and
enables operation from a 13 ampere fuse.
Note: When the machine runs at full speed immedi-
ately after switching on, the reduced starting current
and the restarting protection have failed. The power
tool should be sent immediately to an after-sales serv-
ice.

Working Advice

Exercise caution when cutting slots in struc-
tural 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, con-
tinue to run it at no-load for several minutes
to cool down the cutting/grinding tool.
Grinding and cutting discs become very hot
while working; do not touch until they have
cooled.
Do not use the power tool with a cut-off
stand.
Note: When not using for extended periods, pull the
mains plug out of the socket outlet. When the mains
plug is inserted and mains voltage is given, the power
tool, even when switched off, still consumes a low
amount of current.
Rough Grinding
Never use a cutting disc for roughing.
The best roughing results are achieved when setting
the machine 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.
1 609 929 U21 • 12.8.09
Cutting Metal
For cutting metal, always work with the pro-
tection guard for cutting 9.
When cutting, work with moderate feed, adapted to
the material 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 applying sideward pressure.
Cutting Stone
For cutting stone, always work with the cut-
ting guide with dust extraction protection
guard 20.
The machine may be used only for dry cut-
ting/grinding.
For cutting stone, it is best to use a diamond cutting
disc. As a safety measure against jamming, the cutting
guide with dust extraction protection guard 20 must
be used.
Operate the machine only with dust extraction and
additionally wear a dust protection mask.
The vacuum cleaner must be approved for the extrac-
tion of masonry dust. BTI provides suitable vacuum
cleaners.
diamond cutting disc can overheat and become dam-
aged as a result. This is clearly indicated by circular
sparking, rotating with the diamond cutting disc.
In this case, interrupt the cutting process and allow the
diamond cutting disc to cool by running the machine
for a short time at maximum speed with no load.
Noticeable decreasing work progress and circular
sparking are indications of a diamond cutting disc that
has become dull. Briefly cutting into abrasive material
(e. g. lime-sand brick) can resharpen the disc again.
The machine must
always work in an up-
grinding motion. Oth-
erwise, the danger
exists of it being
pushed uncon-
trolled out of the cut.
When cutting profiles
and square bar, it is
best to start at the
smallest cross sec-
tion.
Switch on the machine
and place the front part
of the cutting guide on
the workpiece. Slide
the machine with mod-
erate feed, adapted to
the material to be
worked.
For cutting expecially
hard material, e. g.,
concrete with high
pebble content, the
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