Putting Into Operation; Working Instructions - Bosch PEX 400 A Bedienungsanleitung

Emptying the dust box
Press the latching lever 14 and pull off the dust box.
Before opening the dust box, it is recommended to
loosen the dust from the filter element by striking
against a hard surface.
Hold the dust box by the recessed grips, lift up the filter
element (micro-filtersystem) 15 upwards and empty
the dust box. Clean the vanes of the filter element with
a soft brush.
Note: To guarantee optimum dust extraction efficien-
cy, empty the dust container in good time and regular-
ly knock out the dust from the filter.
External Vacuuming (see Fig.
(Accessory pages)
Slide the extraction adapter 16 onto the outlet piece
13 and take care that the latching lever engages. For
removal, press the latching lever in at the rear and pull
off the extraction adapter.
When sanding vertical surfaces, hold the machine so
that the extraction hose points downwards.
The vacuum cleaner must be suitable for the material
to be worked.
When vacuuming dry dust that is especially detrimen-
tal to health or carcinogenic, use a special vacuum
cleaner.

Putting into Operation

Ensure that the mains voltage is correct!
The voltage of the power source must agree with the
value given on the nameplate of the machine. Ma-
chines designated for 230 V can also be operated with
220 V.
Switching On/Off
To switch on the machine, press the On-Off switch 5.
Lock the depressed On-Off switch 5 by pressing the
lock-on button 4.
To switch off the machine, release the On-Off switch
5 or push and then release it.
Preselect the required speed with the thumbwheel 2
(also while running) (PEX 400 AE).
The required speed is dependent on the material and
can be determined by practical trials.
After longer periods of working at low speed, allow the
machine to cool by running for approx. 3 minutes at
maximum speed with no load.
2 609 932 202 • (02.08) T
)
B
English–3

Working Instructions

Before any work on the machine itself, pull the
I
mains plug.
Auxiliary Handle
The auxiliary handle 9 makes possible comfortable
handling and optimum force application, especially for
high material removal.
The position of the auxiliary handle can be adjusted
using winged screw 10.
Sanding Plate Brake
An integrated sanding plate brake reduces the speed
when running at no load so that scoring is avoided
when placing the machine on the work piece.
A continuously increasing no-load speed over the
course of time indicates that the sanding plate brake is
worn and must be replaced by an authorized custom-
er service location for Bosch power tools.
Sanding Surfaces
Place the machine with the complete sanding sheet on
the surface to be worked.
Ensure uniform sanding pressure. Less sanding pres-
sure increases the sanding capacity and protects the
machine and the sanding tool.
The removal capacity and the sanding pattern are de-
termined mainly by the selection of the sanding sheet
(grain size), the speed of the sanding plate and the ap-
plication pressure.
Rough Sanding
Attach a sanding sheet with coarse grain (see Applica-
tion Table).
Apply only light sanding pressure to achieve increased
material removal.
Fine Sanding
Attach a sanding sheet with fine grain (see Application
Table).
With moderate pressure, move the machine in a circu-
lar pattern or alternately in lengthwise and crosswise
directions over the work piece.
Do not tilt the machine to avoid sanding through the
work piece (e.g. when sanding veneer).
After finishing the work, switch off the machine and lift
it from the work piece.