Compressed-Air Supply And Commissioning; Compressed Air Preparation; Setting And Adjusting The Speed; Dust Extraction - Festool LEX 3 77/2,5 Notice D'utilisation D'origine

6 Compressed-air supply and
commissioning
CAUTION
Risk of injury
Make sure that the pneumatic tool is
switched off when you connect the com-
pressed-air supply.
6.1

Compressed air preparation

The machine is designed for lubricated and
non-lubricated operation.
The Festool service unit VE must be used in
lubricated operation. Consisting of a filter,
control unit, condensation drain and lubrica-
tor, the service unit cleans and lubricates the
compressed air and keeps it free of conden-
sation. Here, the lubricator should be set so
that a drop is applied to the compressed air
approx. every 15 minutes.
Damage that occurs as a result of in-
correct compressed air processing is
excluded from warranty claims.
We recommend a service unit with a 3/8"
connector, when up to two Festool com-
pressed air tools are used.
A compressor that supplies at least 350 l/min
at an operating pressure of 6 bar should be
used to supply compressed air.
The diameter of the piping system must be
sufficiently large (at least 9 mm).
6.2 Connection for IAS hose system
[3]
The IAS hose system combines several func-
tions in one hose depending on the version:
– Compressed air supply [3-1]
– Exhaust air extraction [3-2]

– Dust extraction [3-3]

6.3 Switch on/off
Switching-on: Press [1-1] switch.
Switching off: Release [1-1] switch.
7 Settings
CAUTION
Risk of injury
The machine should always be disconnect-
ed from the compressed air supply before
any work is carried out on the machine.
7.1

Setting and adjusting the speed

Can be adjusted at the control lever [1-4]
between
LEX 3 77/2.5
LEX 3 125/3, 125/5
LEX 3 150/3, 150/5
This enables you to optimise the material re-
moval capacity to suit the respective materi-
al or application.
7.2 Replacing the sanding pad [4]
An optimal work result can only be
achieved using original accessories and
consumables. The use of non-original
accessories or consumables invalidates the
right to claim under warranty.
Health risk: Fitting sanding pads of in-
correct size causes excessive vibration
of the machine.
Tuned to the surface being processed, the
machine can be equipped with three sanding
pads of different hardnesses.
Hard: Coarse and fine sanding on surfaces.
Sanding edges.
Soft: Universal for coarse and fine sanding,
for flat and convex surfaces.
Extra-soft: Fine sanding of moulded parts,
arches, radii. Do not use on edges.
7.3 Attaching sanding accessories
using StickFix [4b]
The suitable StickFix sandpaper and StickFix
sanding cloth can be attached quickly and
simply to the StickFix sanding pad.
Press the self-adhesive sanding accessory
onto the sanding pad [1-5].
7.4 Dust extraction
WARNING
Dust hazard
Always work with a dust extractor.
Always observe country-specific regulations.
For use of a Festool mobile dust extractor
with flow sensor: Adjust hose diameter
of mobile dust extractor to Ø 27 mm.
To guarantee optimal dust extraction, we
recommend using Festool extractors with au-
tomatic switch-on/switch-off device for com-
pressed air machines.
LEX 3
GB
7.800 - 10.500 rpm
7.500 - 9.500 rpm
7.000 - 10.000 rpm
17