Mestra R-040061 Bedienungsanleitung Seite 18

English
Note: Use a graphite insert in the crucible when melting precious metals with the exception of
palladium alloys.
Preset the heat using the HEATING POWER regulator (Fig. 3-4).
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Note: The HEATING POWER regulator should be set for each type of alloy and according to the
amount of metal required so that during the 30 second preheat program the metal is still
not fully melted.
Set the centrifugal force using the ALLOY SELECTION switch (Fig. 3-9). The setting depends on the
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type of alloy (precious or non-precious).
Turn the centrifugal arm so, that the crucible is just above the induction coil. At this position you hear
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a continuous audible tone.
Press the PROGRAM START button (Fig. 3-6). The induction coil raises automatically to encircle the
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crucible for melting.
Close the chamber cover. The red CLOSED sign (Fig. 3-8) lights up and the yellow HEATING sign
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(Fig. 3-2) shows that the heating function is automatically activated.
The metal begins melting after approx. 25 seconds. The melting procedure should only be observed
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through the protective glass. The HEATING POWER regulator (Fig. 3-4) is used to regulate the heat
during melting.
When the metal is pre-molten, the casting chamber cover can be opened and the hot mould ring can
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be placed in the mould container.
Use tongs to place the hot mould ring in the cradle (Fig. 2-3). Position the mould ring so that the
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sprue is at the same height as crucible spout. The centrifugal arm is balanced automatically (refer to
section 4.1).
Then close the casting chamber cover. The red CLOSED indicator (Fig. 3-8) lights up when the cover
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is closed and the heating continues automatically showed by the yellow HEATING indicator (Fig. 3-
2). Keep the casting chamber cover closed until the metal is molten and is ready for casting.
Risk of burns. The heating cycle can produce high temperatures in the casting chamber.
Note: Press the red STOP button or open the cover to interrupt the heating cycle.
Casting procedure
After the casting chamber cover has been closed, the heating cycle continues automatically. The yellow
HEATING indicator (Fig. 3-2) lights up again.
Continue to observe the melting metal through the protective glass. When the metal is completely
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molten, press the CASTING button (Fig. 3-7). Casting will start only if the cover is safely closed.
The centrifugal arm is rotated by the force of an electric motor. The centrifugal force casts the molten
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metal into the hot investment. The yellow HEATING indicator (Fig. 3-2) goes out and the green
READY indicator (Fig. 3-1) flashes.