Cartridge Installation And Replacement; Extrusion; Timer Function - Renfert SYMPRESS 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 (Fig. 5).
1. Close the unit cover and retract the pistons.
(F, Fig. 3)
The pistons return to their home position at high
speed and automatically stop.
Just before the end, the retraction speed re-
duces. Only open the unit cover once the
pistons have reached their home position
and have stopped.
The pistons will also retract automatically if
a cartridge is completely emptied during ex-
trusion.
If the piston retract motion is interrupted,
either by pressing one of the advance keys
or by opening the unit cover, it will not re-
sume 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 manufac-
turer's instructions.
3. Open the unit cover.
4. Install the cartridge (Fig. 6; 7).
5. Close the unit cover (Fig. 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 properly closed.
Use only mixing nozzles recommended by
the material manufacturer. The use of other
mixing nozzles may cause the mixing
nozzle 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 fill the impression tray more
quickly. The key with the syringe symbol is
more suitable for a slower filling, e.g., of a
syringe.
3. The mixer shaft is activated in order to allow the
hexagonal end to thread itself into the mixing noz-
zle.
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 first 5 cm of material from a newly in-
stalled 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 (sufficient to fill 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 SYMPRESS 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 au-
dible signal.
The timer will not start if the advance keys
are briefly pressed and released without
any impression material being extruded.
The timer employs three different audible signal
lengths to indicate the end of three predefined 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 confirmed by a brief audible signal.
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EN