DENTSPLY DeguDent Degutron eco Instructions For Use Manual page 24

3 Operation
General casting process:
• O pen cooling water supply.
• O pen air pressure supply.
• S witch on vacuum pump.
• S witch on main switch.
• A fter successful self test the display „Power" shows
"---". (ready)
• B efore every first casting the machine performs a short
pressure test. The casting chamber is set under a slight
overpressure before the vacuum starts. If this test fails
(e.g. the casting chamber lid is not closed properly, an
error code is displayed, e.g. E081)
To reduce a temperature loss of the mould, this test can
be preceded as follows:
– Insert empty crucible with graphite inlay with the quartz
tube into the induction coil.
– Close and lock casting chamber.
– P ress "Start" 1x to run the test. The test is successfully
completed if the chamber is getting evacuated and the
heating starts.
– E nd test by pressing "Stop" 1x. Insert the desired
crucible. Caution, the graphite crucible is hot!
• I nsert crucible with material into the quartz glass tube
inside the inductor.
• P lace the respective mould holder into the casting
chamber. The holder can be fixed to keep moulds of
50–80 mm length in 5 mm steps.
• W ith "+" or "-" the desired heating power from 0–100%
can be adjusted. This is also possible during melting.
• P lace mould in the mould holder.
• C lose and lock casting chamber.
• P ress "Start" 1x, unit automatically switches to vacuum
inside casting chamber.
• I f the achieved vacuum is higher than -0.98 bar, the
display switches to a timer.
• B y repeated pushing the 'Start' button you can choose
between full and reduced vacuum.
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eco
Degutron
®
• I f casting temperature is reached (see data sheet of
manufacturer of the alloy) press the button on the handle
to release and tilt the unit uninterrupted clockwise till the
catch. Release the button on the handle to lock the unit
in the tilted position. During the tilting the unit automati-
cally switches from vacuum to overpressure inside the
casting chamber. The generator stops. On the display
"Time" a timer counts the seconds after casting.
• A fter a sufficient waiting time (min. 1 min.), unlock the
handle and tilt the unit back to horizontal position. The
vacuum inside the crucible chamber is released to
ambient pressure.
• O pen the casting chamber and remove the mould and
the mould holder.
Important note for the use of the ceramic crucible
without graphite:
The induction system needs for a good coupling into the
metal a certain mass/volume of metal.
If you use metal ingots, place the ingots horizontal,
parallel to the crucible bottom. Also short cylinders should
be placed this way for a better heating performance.
Leave enough space to the crucible wall, because the
heated metal will expand and can break the crucible.
For the specific use of graphite or ceramic crucibles
please follow the instructions of the respective alloy
producer.