Electronic Control; Temperature Protection; Machine Settings; Chip Thickness Adjustment - Festool HL 850 E Guide D'utilisation

The devices are fitted with a full-wave electronic
control with the following functions:
Smooth start-up
The electronically-controlled smooth start-up en-
sures that the machine starts without jolts.
Idling speed
The electronic circuit limits the idling speed. This
means that the noise level also remains low during
idling.
Constant speed
The speed of the planer shaft is electronically
regulated to a constant value, thus also providing a
constant cutting speed under load.
Always disconnect the plug from
the power supply before making any adjustments to
the machine or installing or removing any accessory!

Chip thickness adjustment

After the interlock (2.2) has been released by push-
ing it backward, the chip thickness can be steplessly
adjusted between 0 and 9/64" (3.5 mm) by turning
the supplementary handle (2.3). The chip thickness
which has been set can be read in the scale window
(2.1). One division corresponds to a chip removal of
1/64".
2.3
+
If a constant chip thickness is to be set the interlock
must be pressed forward again after the chip thick-
ness has been adjusted. If the chip thickness has to
be varied during operation (fitting work) the interlock
should be left open.
The supplementary handle can be turned beyond the
0 mark to reach the P (= Park) position, in which the
spiral cutter is completely retracted. This is, however,
not the case with the rustic planer heads.

Electronic control

Machine settings

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2.2 2.1

Temperature protection

Extreme overload in continuous running will cause
the motor to overheat. An electronic temperature
monitoring device is fitted to provide protection
against overheating (burning-out of the motor). The
electronic safety device switches off the motor be-
fore a critical motor temperature is reached. After a
cooling period of approx. 3-5 minutes, the machine is
once again ready for use at full load. If the machine
is kept running (idling), the cooling period is reduced.
Do not work with the planer if the electronic control
is defective, since this may lead to excessive speeds.
A defect in the electronic control is indicated by the
absence of a smooth run-up, a higher noise level
at idle or the fact that no speed control is possible.
Always ensure, therefore, that
when setting the machine down on a surface the
parking device (1.8) at the end of the planer platen
is correctly extended.

Planer heads and spiral cutters

Use only cutters which are sharp
and undamaged. Blunt cutters increase the danger
of kick-back and reduce the planing quality obtained.
The planer is equipped with planer head HK 82 SD as
standard series. The planer head has inclined, fitted
cutters, which is why the cutters cannot be reground.
a) Changing the planer head
Use the spindle stop (3.5) to lock the planer shaft
and unscrew the allen bolt (3.1) from the planer head
(3.4) using the allen key (3.6). Remove the planer
head from the planer shaft.
Before fitting the new planer head clean the planer
shaft to remove any dust residues.
The planer head can be fitted to the planer shaft
in reverse order using the clamping flange (3.3),
washer (3.2) and allen bolt (3.6).
3.5
3.6
3.4 3.3 3.2 3.1
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