Berner BOS-280 Manual Original página 13

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External Dust Extraction (see figure C)
Slide the extraction adapter 14 onto the outlet
piece 15. Ensure that the latching levers of the ex-
traction adapter engage. The extraction adapter 14
accepts a vacuum hose with a diameter of 19 mm.
For removal of the extraction adapter 14, press the
latching levers together at the rear and pull the ex-
traction adapter off.
The vacuum cleaner must be suitable for the mate-
rial being worked.
When vacuuming dry dust that is especially detri-
mental to health or carcinogenic, use a special vac-
uum cleaner.
Internal Dust Extraction with Dust Bag
(see figure D)
Before mounting the dust bag 6, pull out the plastic
slider 16. Slide the dust-bag sleeve firmly over the
extraction outlet 15. Pay attention that the plastic
slider 16 engages in the holder intended for it on
the dust bag 6.
Replacing the Sanding Sheet
When attaching a new sanding sheet, remove any
dust or debris from the sanding plate 9 (e. g. with a
brush).
To ensure optimum dust extraction, pay attention
that the punched holes in the sanding sheet match
with the holes in the sanding plate.
Sanding Sheets with Velcro Backing
(see figure A)
The sanding plate 9 is fitted with Velcro backing for
quick and easy fastening of sanding sheets with
Velcro adhesion.
Before attaching the sanding sheet 12, free the Vel-
cro backing of the sanding plate 9 from any debris
by tapping against it in order to enable optimum
adhesion.
Position the sanding sheet 12 flush alongside one
edge of the sanding plate 9, then lay the sanding
sheet onto the sanding plate and press firmly.
To remove the sanding sheet 12, grasp it at one of
the tips and pull it off from the sanding plate 9.
Sanding Sheets without Velcro Backing
(see figure B)
Lightly lift and unlatch the sanding-sheet clamp 8.
Guide the sanding sheet 12 under the opened rear
clamping bracket 10 to the stop and clamp the
sanding sheet by reinserting the sanding-sheet
clamp 8.
Fold the sanding sheet 12 firmly around the sand-
ing plate. Guide the other end of the sanding sheet
12 under the open front clamping bracket 10 and
clamp the sanding sheet by reinserting the sand-
ing-sheet clamp 8.
1 609 92A 1D6 • 6.8.15
Sanding sheets without holes, e. g. from rolls or by
the meter, can be punctured with the perforating
tool 17 for use with dust extraction. For this, press
the machine with the mounted sanding sheet onto
the perforating tool (see figure E).
To remove the sanding sheet 12, unlatch the sand-
ing-sheet clamp 8 and pull out the sanding sheet.
Selecting the Sanding Sheet
Depending on the material to be worked and the
required rate of material removal, different sanding
sheets are available:
For the working of all
wooden materials
For coarse-sanding, e. g.
of rough, unplaned beams
and boards
For face sanding and
planing small irregularities
For finish and fine sanding
of hard woods
For the working of
paint/enamel coats or
primers and fillers
For sanding off paint
For sanding primer
For final sanding of prim-
ers before coating
Replacing the Sanding Plate
(see figure F)
The sanding plate 9 can be replaced, if required.
Unscrew the 6 screws 18 completely and remove
the sanding plate 9. Attach the new sanding plate
9 and tighten the screws again.
Specialty Sanding Plates
You can replace the supplied sanding plate 9 with
a specialty sanding plate, which is available as an
accessory.
The specialty sanding plate is attached in the same
manner as the one supplied.
Attach and remove the respective sanding sheets
in the same manner as when changing original
sanding sheets.
Grain size
40–400
coarse
40, 60
medium 80, 100, 120
fine
180, 240,
320, 400
40–320
coarse
40, 60
medium 80, 100, 120
fine
180, 240,
320
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