Cartridge Installation And Replacement; Extrusion; Timer Function; Timer Function On/Off - Renfert Duomix Instrucciones Para El Servicio

2.2 Cartridge Installation and
Replacement
A cartridge can only be installed or replaced if both
pistons are in their home position (Figure 5).
1. Close the unit cover and retract the pistons.
(F, Figure 3)
The pistons return to their home position at high
speed and automatically stop.
The pistons will also retract automatically
if a cartridge is completely emptied during

extrusion.

Simultaneously with the pistons reaching
their home position, the mixer shaft is with-
drawn from the mixing nozzle so that the
cartridge can be removed.
If the piston retract motion is interrupted,
either by pressing one of the advance keys
or by opening the unit cover, it will not
resume automatically. To resume the retract
motion you must again press the retract key
(F).
2. Install and lock the mixing nozzle in place on
the cartridge in accordance with the material
manufacturer's instructions.
3. Open the unit cover.
4. Install the cartridge (Figure 6; 7).
5. Close the unit cover (Figure 8).
The cover will only close if the cartridge has been
properly installed. The red "Unit cover" LED (H)
will remain on until the unit cover has been proper-
ly closed.
Use only mixing nozzles recommended by
the material manufacturer. The use of other
mixing nozzles may cause the mixing nozz-
le to burst.
2.3 Extrusion
The pistons will only move if the unit cover
is closed.
1. Install a cartridge as described in Sec. 2.2.
2. Press and hold down the advance key
(depending on the desired speed or function):
• Impression tray
or
• Dispenser
The key with the casting spoon symbol can
be used to fi ll the impression tray more
quickly. The key with the syringe symbol is
more suitable for a slower fi lling, e.g., of a
syringe.
3. The mixer shaft is activated in order to allow the
hexagonal end to thread itself into the mixing
nozzle.
The threading of the mixer shaft into the
mixing nozzle produces an audible noise.
This is perfectly normal.
• The pistons advance at high speed until the
pressure discs reach the impression material.
• Once the pressure discs contact the impression
material, the unit automatically switches to the
desired extrusion speed.
4. Fill the impression tray or dispenser.
The fi rst 5 cm of material from a newly
installed cartridge or from an again inserted
used cartridge should be discarded.
Please note the material manufacturer's
recommendations!
5. Release the advance key as soon as the desired
amount of material has been extruded.
• The pistons retract with a short relief stroke to
prevent any additional impression material from
being extruded.
• If the timer is activated, a short audible signal
will indicate timer start (refer to Sec. 2.4).
The yellow LED (I) goes on when there is
only a small amount of material left in the
cartridge (suffi cient to fi ll approx. one more
casting spoon) (refer to Sec. 2.5.2).
If the cartridge is emptied during an extru-
sion, the pistons automatically return to
their home position so that a new cartridge
can be quickly installed and the extrusion
process can be continued.

2.4 Timer Function

The Duomix has an integrated timer.
On delivery of the unit the timer is not activated. To
activate the timer, see 2.4.1.
The activated timer starts automatically at the end
of the press cycle. Timer start is indicated by a brief
audible signal.
The timer will not start if the advance keys
are briefl y pressed and released without
any impression material being extruded.
The timer employs three different audible signal
lengths to indicate the end of three predefi ned time
periods:
• After 3 min.: 1 signal
• After 4 min.: 2 signals
• After 5 min.: 3 signals
The timer can be stopped by simultaneously pressing
both advance keys.
Timer stop is confi rmed by a brief audible signal.
2.4.1 T F
IMER UNCTION
The overall timer function can be activated or deacti-
vated:
To do this:
• Switch the unit off.
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ON/OFF
EN