DENTSPLY AUSTENAL ELECTROMATIC-4 User manual

ELECTROMATIC -4
INDUCTION CASTING MACHINE
Operations Manual
DENTSPLY Austenal
DENTSPLY International Inc.
570 West College Avenue
York, PA 17405-0872
1-800-243-1942
prosthetics. entsply.com
www. entsply.com
Customer Service: 1-800-243-1942
Equipment Repair: 1-800-645-4333
Printe in U.S.A. NPK1312 Rev. C (04/12)

IMPORTANT WARNING
The Electromatic - 4 has been built to provide the sa est possible operating conditions
consistent with the ability to per orm its intended casting unctions. However, the high
requency and voltage produced require certain precautions to be taken.
THIS MACHINE IS DESIGNED WITH SAFETY FEATURES TO PROTECT THE
OPERATOR AND MUST NOT BE MODIFIED IN ANY FORM. ONLY A QUALIFIED
PERSON SHOULD MAKE ANY REPAIRS OR ADJUSTMENTS. CALL DENTSPLY
PROSTHETICS' TECHNICAL SUPPORT FOR REPAIR RECOMMENDATIONS. FAILURE
TO OBSERVE THIS PRECAUTION MAY RESULT IN SEVERE RADIO FREQUENCY
BURNS OR ELECTRICAL SHOCK.
PERSONS WEARING PACEMAKERS SHOULD NOT BE ALLOWED TO OPERATE THE
UNIT AND IT IS ADVISABLE THAT SUCH INDIVIDUALS MAINTAIN A DISTANCE OF
10 FEET FROM THE OPERATING AREA.
Failure to observe this precaution may result in mal unction o the pacemaker while in
the vicinity o the machine and critical injury. Individuals who wear pacemakers should
be restricted rom the designated working vicinity o the machine. The Electromatic - 4
should not be operated in their presence.
Electromatic -
1

Important Warning . . . . . . . . . . . . . . . .1
Introduction . . . . . . . . . . . . . . . . . . . . . 3
Installation Preparations . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . 5
Testing the Unit . . . . . . . . . . . . . . . . . . 10
Instrument and Control Description . . . .13
Trouble Shooting o Castings . . . . . . . .16
Speci ications . . . . . . . . . . . . . . . . . . .17
Maintenance . . . . . . . . . . . . . . . . . . . .19
Replacement Parts . . . . . . . . . . . . . . . .19
Electromatic -
2
TABLE OF CONTENTS

INTRODUCTION
The ELECTROMATIC - 4 has been esigne an built to consistently pro uce metallurgical soun precision
castings through a series of rigi ly controlle operations, automatically or manually performe . Casting with the
Electromatic - 4 consists of four basic operations:
1. Placing preheate crucible an mol in their appropriate hol ers
2. In uction melting of the alloy
3. Centrifugal casting of the molten alloy into the mol
4. Removal of the crucible an mol
Phases 2 an 3 are accomplishe through a complex electro-mechanical system. In uction melting is accomplishe
by creating a rapi ly alternating magnetic fiel , which causes the alloy in the crucible to absorb energy an
melt. The high frequency fiel is evelope in a water-coole coil, which surroun s the crucible an is pro uce
by a generator, which oscillates at approximately 500 kHz (thousan s of cycles per secon ).
The START an STOP push buttons, the ON in icator an the circuit breaker form a circuit that will provi e
power to the Generator if the Melt Coil is in the UP an LOCK position, an to the Centrifuge Motor if the Melt
Coil is in the DOWN position. Pressing the START push button will latch the circuit, which will be in icate by the
ON in icator, if all the interlocks are operating normally. The circuit will automatically unlatch in the event of a
power failure. This minimizes the possibility of an acci ent if the power is su enly restore . If an overloa
occurs within the Melt Circuit uring the melting cycle, the overloa circuit will turn off an unlatch the operation.
Pressing the STOP push button will unlatch the circuit uring Melting or Centrifuging an iscontinue power to the
generator or the centrifuge motor correspon ingly. During the centrifuge operation the cover is locke an can
not be opene until the arm comes to a complete stop. With the unit in the Automatic mo e, control of the
casting temperature is maintaine by the Optical Ra iation Pyrometer. This etector senses both visible light an
infrare ra iation coming irectly from the alloy, or carbon insert. Its signal is fe to a soli state Temperature
Controller. When the molten alloy reaches a preset temperature, the power to the Melt Coil is cycle ON an
OFF, automatically maintaining the alloy at the selecte temperature prior to casting. This hol ing cycle is calle
“soaking”. Soaking times can be set from 0 to 60 secon s, an is engage by momentarily pressing the SOAK
TIMER ENGAGE push button uring melting or after the alloy has reache temperature. When the Soak Timer
completes the cycle an the Centrifuge Cover is close , the Melt Coil rops, the casting arm revolves clock-wise
an the molten alloy will be centrifugally cast into the mol . The centrifuge will spin for 30 secon s an
automatically stop. When the unit is use in the Manual mo e, control of the casting operation is epen ent on
the operator observing the alloy in the crucible an manually cycling the Start an Stop push buttons maintains
proper temperature. When the alloy is rea y to cast, place the investment ring in the cra le an close the
Centrifuge Cover. Continue to cycle the Start an Stop push buttons to maintain the esire casting temperature.
With the Start an Stop circuit latche , activate the Coil Release switch. This will rop the Melt Coil, the casting
arm will revolve an the molten alloy will be centrifugally cast into the mol . The centrifuge will spin for 30
secon s. When the centrifuge is in operation, in either Automatic or Manual mo e, the Coil Release Switch will
be inoperative until power to the centrifuge motor has been iscontinue .
Electromatic -
3

10 ”
28”
39”
WATER OUT
POWER CORD
40 A FUSES
220 V. 1 PHASE
WATER SUPPLY
WATER FILTER
WATER DRAIN
ALTERNATE WAT ER DRAIN
AREA FOR
E.C.M.
1 INCH SPACE
VALVE
REGULATOR
WATER IN
INSTALLATION: PREPARATION
The following outline has been arrange to provi e pertinent information relating to the installation, a justments
an testing of the Electromatic - 4. Strict a herence to these requirements will insure maximum epen able service.
Protect the unit from nearby furnace heat with a shield, if necessary.
FIG. 1
1. Customer will provi e essential electrical an water service for the unit.
A. See installation iagram.
B. Place unit where room temperature will never excee 122°F (50°C).
C. Unit shall not be expose to corrosive vapors or abrasive ust.
D. The rawing an following information will serve as a gui e for installation.
Installation of require utilities to comply with local co es.
Electromatic -
4
CAUTION:

Electromatic -
5
2. SPACE REQUIREMENTS
A. Floor: 49” (124 cm) wi e by 38” (97 cm) eep from wall.
NOTE: The machine base measures 38 1/2” (98cm) by 27 l/2” (70 cm).
Additional clearances of 10” (25 cm) behind and 5” (13 cm) on each side are required.
B. Height: A equate overhea clearance of 6 feet (183 cm) from the floor must be allowe for
sighting the pyrometer.
3. ELECTRICAL SERVICE REQUIRED
220 Volts A.C., 40 Amps., fuse , 50/60 Hz., single phase.
NOTE: For convenience, it is suggested that the
switch be located on the wall behind the unit,
approximately 50” (127 cm) from the floor.
4. WATER SERVICE REQUIRED (20 psi at 1.5 gpm)
3/8” water line with a shut-off valve an a water filter.
NOTE: If area pressure is low at times, a water pump may be installed in the incoming line to
provide sufficient pressure.
5. WATER DRAIN
A. Install rain facilities behin the unit
B. If rainage runs are longer than five feet (152.4 cm), the insi e iameter of the rain must be
increase to 3/8” (9.5mm) to avoi possible backpressure into the unit.
NOTE: The level of the drain line should not exceed the height of the machine (36” or 91 cm).
INSTALLATION
1. POSITION THE UNIT
Locate accor ing to installation preparation plans
2. WATER CONNECTIONS (Fig 2)
A. Install WATER FILTER ASSEMBLY (N155554 an N155555) an
WATER PRESSURE REGULATOR (N115282) between water valve
an the machine
B. Attach 3/8” N.P.T. hose barb to WATER FILTER an also to
the machine WATER IN.
C. Attach 1/4” I.D. rubber hose between the filter an the machine
an secure with clamps.
D. Attach 3/8” N.P.T. hose barb to the machine (WATER OUT) connection.
E. Attach 1/4” I. D. (6mm) rubber hose to barb an secure with hose clamp.
F. Run the hose irectly to rain.
570 College Ave., York, PA 17405-0872
MADE IN U.S.A.
MODEL
AMP.
SER#
VOLTS
HZ.
N155700 220
30 50/60
ELECTROMATIC - 4
FIG. 2
Water In
Water Out

3. ELECTRICAL CONNECTIONS
A. Connect the cable to the power junction box on the wall accor ing to the local wiring co es. Leave
enough slack so the unit can be move away from the wall for service. The power cable has three wires,
Brown an blue will provi e the 220 V, an Yellow/green which is GROUND. This unit must be
groun e at all times.
4. OPTICAL RADIATION PYROMETER
A. Pyrometer Assembly (Fig 3)
a. Raise pyrometer support arm an lightly tighten setscrew (A)
b. Assemble pyrometer an bracket assembly to support arm,
an lightly tighten setscrew (B).
c. Connect cor assembly (C) to pyrometer
B. Pyrometer Alignment
a. Pyrometer a justments shoul be ma e with a sighting crucible in the crucible hol er, an the
Melt Coil raise into the Melt position. The sighting crucible has two small sighting spots, one
towar s the si e an one on bottom center. These are use as targets when sighting in the pyrometer.
b. A just height of pyrometer support arm to achieve 19 1/2” (49.5 cm) from the lens barrel to the
insi e bottom of the crucible
c. Look into the eye-piece, a circular reticle will appear in view. A justments are ma e to focus
an center the sighting spots in the reticle.
(1) Right or Left Alignment (Fig. 3)
(a) Loosen setscrew (A) at base of support
arm an rotate unit, or
(b) Loosen setscrew (B) on horizontal part of
support arm an rotate pyrometer.
(c) With the pyrometer tilte back (bottom set
screw contacting Stop) sight the reticle on
the bottom spot of the crucible. (Fig. 4)
NOTE: The bottom spot should have different marking from the spot on the side.
For identification (see Figure .)
( ) Tighten all setscrews
Electromatic -
6
FIG. 3
FIG. 4

Electromatic -
7
(2) Back Alignment (Fig 5)
A just top setscrew (B) up or own to center
bottom spot in the reticle. Tighten lock nut.
(3) Forwar Alignment A just top setscrew (A) up
or own to center si e spot in the reticle when
pyrometer is tilte forwar . Tighten lock nut.
(4) Focusing the Pyrometer
(a) Loosen recesse setscrew (C) until lens
tube sli es freely.
(b) Sight through sighting lens (D) to bottom
center spot in sighting crucible.
(c) Raise or lower lens tube (E) until spot comes into sharp focus.
( ) Move your hea slightly from si e to si e; a just lens so spot oes not move
in relation to reticle.
(e) Tighten setscrew (C), which will lock in the lens tube in position.
NOTE: Pyrometer readings are taken only from the area within the reticle.
C. Forwar an back positions of pyrometer.
a. Forwar position (sighte on carbon) for noble an precious alloys
b. Back position (sighte on alloy) for chrome base alloys
5. MOLD HOLDER (Fig 6) (Various sizes available)
A justments:
A. Lower coil an let crucible support cra le (A) come forwar
against the front gui e
B. Select two correctly size Mol Hol ers an place one in
the front hol er support (D) an the other in the back
hol er support (E).
C. Locate the back hol er support (E) in the appropriate
groove (F) that will position the mol ring face even or
almost even with the front face of the Mol Hol er.
NOTE: Correct Mold Holders should be determined
before burnout.
FIG. 5
FIG. 6
A - Cra le
D - Front Mol Hol er Support
E - Back Mol Hol er Support
F - Flask Length A just. Spacer

6. TUBE INSTALLATION (Fig. 7)
When installing a new tube, turn the Main power switch OFF.
(Fig. 11-2)
A. The tube shoul be installe in the vertical position with the
ano e en own. Insert the tube insi e strap (A) an with
the fittings (B) facing right, tighten strap (A) aroun the
tube bo y.
B. Connect the longer water hose from the water choke to the
top fitting of the tube ano e; the shorter water hose to the
bottom fitting
C. Connect the white wire (C) from the flange of the tube to
the resistors above.
D. Using bolts an washers fasten securely to terminal
connector (D)
a. Connect the white wire of the tube to the center terminal screw.
b. Connect the black wires from the tube to the outer terminal screws.
NOTE: Arrange leads with ample space between them so they do not touch
one another and tighten nuts securely.
NEW TUBE BREAK IN
New tubes shoul be operate for 30 minutes with only the filament ON. Do not operate the machine for that
perio of time. After the 30 minutes have elapse , the unit can be use in Normal operation. This proce ure
shoul be performe only for the first operation of the tube an is not necessary every time the unit is turne
on. If the unit was inoperative for a perio of two months or more, the above proce ure shoul be followe .
7. WATER & ELECTRICAL CALIBRATION
Read INSTRUMENTS AND CONTROLS DESCRIPTION for reference:
A. Turn on main water valve an check for leaks on interior an exterior connections.
Check water flow from outlet hose of rain.
B. Turn the main POWER switch to the ON position. (Fig. 11-2)
C. A just the water pressure regulator to 20 psi. The temperature controller will illuminate if the following
con itions are met: The unit is receiving water, fuses (F1 & F2) are not blown, an circuit breaker
(Fig. 11-1) is in the ON position.
D. Transformer tap selection
a. With a voltmeter, measure the voltage at the fuse box on the wall.
b. Follow the table below an connect wire # 7 to the appropriate voltage tap at the control
transformer (Fig - 8)
Electromatic -
8
FIG. 7
CAUTION:
WHEN WORKING ON THE INSIDE OF THE UNIT, ALWAYS HAVE
THE MAIN POWER SWITCH "OFF"

E. Connect wire # 7 as follows:
F. Filament Voltage A justments Replace the front panel.
a. Momentarily operate the generator an observe Filament Voltage Meter.
b. Filament voltage shoul rea between 12.3 an 12.9 VAC (Fig 9). If lower than this range,
place wire 6 at the transformer, to “L”. If higher than this range, place wire 6, to “H”.
G. Gri Coil A justments (Fig 9)
a. Place 2 ingots of Vitallium in a new crucible.
b. Switch the power level switch (Fig 12-3) to position 3.
c. Operate generator for 3 secon s an recor on a piece of paper the gri current
Electromatic -
9
VOLTAGE AT
FUSE BOX
CONNECT
WIRE # 7 TO:
195-205 V 200
206-215 V 210
216-225 V 220
226-235 V 230
236-245 V 240
246-255 V 250
FIG. 8
FIG. 9
WARNING:
Before any grid coil adjustments are made, press the Stop button to
avoid melting the two test ingots.

Electromatic -
10
(1) The gri current meter shoul rea 400 ma.
NOTE: before making any adjustments, always push the STOP button.
For more accurate calibration, do not melt the two metal ingots.
(2) If the current is higher, using a small screw river turn the calibration screw
(Fig. 14-4)1/4 turn CCW.
(3) If the current is lower, than 400 ma., turn the calibration screw 1/4 turn CW.
(4) Repeat steps 2 an 3 if necessary.
8. CENTRIFUGE COUNTER-BALANCE (Fig.10)
The Centrifuge counter-balance weight shoul be positione along the centrifuge arm to balance the
combine weight of investment ring, crucible an the alloy.
A. A just counter weight position for vibration-free operation as follows:
a. Place a ring of appropriate size in the casting arm.
b. Place a crucible in the crucible carriage.
c. Loa crucible with approximate alloy weight to be use .
. With the Melt Coil in the Down position, spin the casting arm
by pressing the green START push-button an close the
centrifuge cover.
B. A justments
Loosen the arm's center knob an counterweight. When the arm is
loose an not balance , the heaviest si e will be lower. Sli e the counterweight until the arm is
levele an at equal height. Tighten the center knob an counterweight.
TESTING THE UNIT
Preparing the Unit for Operation
1. Verify that water is flowing through unit by checking water flow from outlet hose at rain.
2. Turn Main Power Circuit Breaker an Mains isconnect switch "ON".
3. The temperature controller shoul light if the unit is receiving power.
4. The start push-button shoul light if the following con itions are met:
A. Unit is receiving water pressure of 20 psi
B. Fuses (F1 or F2) are not blown
C. Circuit breaker (Fig. 11) is in the "ON" position
D. Front an rear panels are close .
FIG. 10

OPERATING INSTRUCTIONS
To test the operation of the unit, apply the following proce ure:
(a) Use ummy carbon mol
(b) Place approximately 30 grams (1 oz) chrome-cobalt alloy in the crucible
(c) A just counter-weight to balance centrifuge
( ) Set temperature for 2820°F (1549°C)
(e) Set Automatic/Manual key switch to Automatic
(f) Set soak Timer for 10 secon s
(g) Set Centrifuge Acceleration Re ucer to 50%
(h) Set Melt Power Selector to position 3
(i) Raise the Melt coil to the Up an locke position
(j) Place the optical pyrometer to the back sighting position.
(k) Close the centrifuge cover
(l) Press the Start Button. The alloy shoul melt within 40 secon s
(m) Press Soak Timer Engage Button when melt reaches temperature
(n) When soaking time has expire , Melt Coil will rop, centrifuge arm will spin an cast
the molten alloy into the ummy mol ; spin for 30 secon s an stop.
(o) Open centrifuge cover
(p) Remove crucible with tongs an clean out slag on tray provi e .
NOTE: Do not clean or de-slag crucible while in crucible holder.
ELECTROMATIC - SETTINGS
The following is a general gui e to Electromatic - 4 settings an crucible selection when operating the machine. For
specific instructions when casting a particular alloy, please consult the appropriate technique manual.
Electromatic -
11
Chrome Cobalt Alloys Gol Alloys Non-precious Alloys
Melt Power Selector 3 2 3
Centrifuge
Acceleration
Re ucer
25-75
25-50
over 1 oz
10-25
1 oz or less
25-50
over 1 oz
10-25
1 oz or less
Pyrometer Position Back focuse on alloy Forwar focuse on
carbon insert
Back focuse
on alloy

Electromatic -
12
CRUCIBLE SELECTION:
The In uction Casting Crucible, Catalog #N031106, shoul be use for Chrome-Cobalt, Palla ium Base , an
non-precious alloy castings. When melting gol base alloys, a carbon insert, Catalog #N242903 shoul be use .
MANUAL MODE OPERATION
(a) A just the centrifuge counter-balance for smooth spin.
(b) Set the Automatic/Manual mo e selector to Manual.
(c) Set the centrifuge acceleration re ucer.
( ) Align casting arm with slot on coil gui e assembly, then raise the Melt Coil.
(e) Select the appropriate power setting with the Melt Power Level Switch
(f) Place pre-heate crucible in crucible hol er.
(g) Loa crucible with alloy.
NOTE: Do not use flux at any time during melting.
(h) Press the Start button
(i) Place preheate mol ring into cra le. Check crucible alignment with sprue hole.
NOTE: The centrifuge turns clockwise. A slight lead angle (clockwise) of the crucible spout
is advised.
(j) Directly observe melt rea iness
(k) Cycle the Start an Stop push buttons to regulate temperature
(l) When rea y to centrifuge, close the centrifuge cover. With the Start-Stop circuit latche , press the Coil
Release Switch. The Melt Coil will rop, the casting arm will revolve, an the molten alloy will centrifugally
cast into the mol .
(m) Press the Stop button or open the Centrifuge Cover to stop the centrifuge
(n) Remove flask ring an place on cooling rack.
(o) Remove crucible to clean out slag on tray provi e . Do not clean or e-slag crucible while in the
crucible hol er.
NOTE: During the Manual operation, the Temperature Controller, Pyrometer, and soak Timer, will
be out of the circuit.3. SOAK TIMER - (Fig. 12-15)
CAUTION:
A separate crucible and carbon insert should be identified and
maintained for each of the alloys used. Care should be taken to avoid
contamination through mix-ups.

INSTRUMENTS AND CONTROLS DESCRIPTION
1. MAIN POWER CIRCUIT BREAKER
This switch is an overloa circuit breaker for the
whole unit. It will turn off automatically if an
overloa occurs within the unit. MAIN POWER
CIRCUIT BREAKER MUST BE TURNED OFF
IMMEDIATELY AFTER ANY POWER FAILURE.
2. MAIN POWER SWITCH (Fig. 11-2)
This switch is use to provi e power to the machine. To prevent any unauthorize usage of the machine, up
to three locks coul be use when in the OFF position. In the event of an emergency, turn this switch OFF.
Electromatic -
13
ELECTROMATIC - 4
1 CENTRIFUGE ARM
2 DROP MECHANISM
3 WATER COOLING ASSEMBLY
4 OSCILLATOR ASSEMBLY
5 POWER MODULE
6 CENTRIFUGE ASSEMBLY
7 RELAY LOGIC ASSEMBLY
8 POWER FILTER
9 CENTRIFUGE COVER
10 PYROMETER ASSEMBLY
FIG. 11
FIG. 12

Electromatic -
14
3. MELT POWER SELECTOR SWITCH (Fig. 12-3)
The switch setting etermines the amount of power elivere to the Melt coil. Three (3) ifferent power
settings are provi e : 1, 2, an 3 (LOW to HIGH).
4. TEMPERATURE CONTROLLER - (Fig. 13)
To change the setpoint, (SP_1) press an hol the
“Prog” key an the ∇at the same time. Display
Flashes. To change the value, use the Δ∇keys. Push
“Prog” once (SP_2) appears use the Δ∇keys to
change value. After changes are one continue to
press the “Prog” key to store changes in memory an return to the operational isplay screen. (< 1700)
To view the setpoint press the “Prog” an the ∇key both at once. The isplay will flash an in icate the
SL_1 setpoint. Push the “Prog” again to view the SP_2 set point…etc. Continue to push the “Prog” button to
return to normal operational mo e or Push “Prog” an ∇at the same time
Caution: Do Not Change the SPC_1 thru SPC_6 set point numbers, they will change the meters operation.
If by chance they o get change , set them as follows:
SPC_1=100, SPC2_=000, SPC_3=000, SPC_4=000, SPC_5=000, SPC_6=000
5. START PUSH BUTTON (Fig. 12-5)
This switch illuminates when the machine is rea y for operation an will provi e power to the generator or the
centrifuge motor. Pressing the Start push button will latch the circuit an illuminate the ON In icator (Fig. 12-6).
6. ON INDICATOR (Fig. 12-6)
The white light in icates that the melt or the centrifuge cycles are on operation.
7. STOP PUSH BUTTON (Fig. 12-7)
The stop push-button stops the melt cycle or the centrifuge cycle.
8. COIL RELEASE SWITCH (Fig. 12-8)
The coil release switch illuminates when the MELT COIL is rea y to be lifte or roppe . This switch will not
operate uring the centrifuge cycle.
9. CENTRIFUGE ACCELERATION (Fig. 12-9)
This rheostat controls the "take-off" spee of the centrifuge.
A. Maximum acceleration occurs at the “0” setting with the pointer in the fully clockwise position.
B. Minimum acceleration occurs at the "10" setting, with the pointer in the fully counter-clockwise position.
NOTE: The final centrifuge speed is pre-set at the factory at 00 rpm.
10. PLATE CURRENT METER (Fig. 12-10)
This meter in icates the tube's plate current uring the melt cycle, which shoul not excee 1.5 amp.
FIG. 13

11. GRID CURRENT METER (Fig. 12-11)
The gri current meter in icates the current provi e to the tube's gri uring the melt cycle. The meter's
in icator will fluctuate when the oscillator is on, but shoul not excee 450 Ma.
12. FILAMENT VOLTAGE METER (Fig. 12-12)
This meter in icates the voltage across the filament of the tube. This voltage shoul be 12.6 VAC .
13. AUTOMATIC/MANUAL MODE KEY SWITCH (Fig. 12-13)
This switch selects the mo e of operation of the unit, Automatic or Manual. In the Automatic mo e, the alloy
melt temperature, soak time an the casting operation will be controlle automatically. When the unit is
operate in the manual mo e, the alloy temperature an casting operation are controlle by the operator.
14. MELT COIL LIFT LEVER (Fig. 14-1)
Locate in the front panel, this lever raises the MELT COIL into position
aroun the crucible. A bearing on the crucible carriage fits into a slot
in the coil gui e assembly.
To raise the melt coil,
A. Align bearing with slot.
B. Push coil release switch (Fig. 12-8) with your left han
C. Raise the melt coil by pushing own on the melt coil lift ever (1)
with your right han . Do not force the lever own. If any resistance
is felt, recheck gui e alignment.
D. While pushing the lever own, release the COIL RELEASE SWITCH in your left han .
E. To rop the MELT COIL, press the COIL RELEASE SWITCH (Fig. 12-8). In case of emergency, or when the
coil release switch is out of operation, push in the MANUAL COIL RELEASE, (Fig. 14-3).
15. SOAK TIMER - (Fig. 12-15)
A 0-60 secon soli state timing evice provi es a controlle amount of soak time to the melt while at
temperature. The timing cycle is initiate only when the push button above the timer is engage by the
operator. If engage uring the melting cycle, the timing sequence will start once the melt reaches
temperature. The timer will operate only in the automatic mo e.
A. Soak time from 0 - 60 secon s can be pre-set with the use of the push buttons (FIG. 12-14) locate at
the right si e of the soak timer.
B. If the centrifuge cover is open, automatic casting will not occur at the en of the soak time. Centrifuge
casting will only occur when the cover is close .
C. The bar graph in icates the amount of time remaining uring the soak cycle.
16. WATER PRESSURE GAUGE (Fig. 14-2)
This gauge in icates the water pressure provi e to the unit.
Electromatic -
15
WARNING:
To avoid any damage to the unit, only Authorized personnel should
operate this machine on the MANUAL mode.
FIG. 14
1
32

TROUBLE SHOOTING OF CASTINGS
1. Excessive fins
A. Check initial setting time of refractory mo els an mol s. (It shoul be no less than 15 minutes).
B. Raise centrifuge acceleration setting; this ecreases take-off spee .
C. Decrease casting temperature 25°F (14°C).
2. Short Castings
A. Lower centrifuge acceleration setting; this increases take-off spee .
B. Raise casting temperature 25°F (14°C).
C. Check burnout furnace temperature an soak time.
3. Alloy Spillage
A. Too much alloy.
B. Crucible not properly aligne with mol sprue former.
C. Sprue former is too shallow.
D. Mol Hol er too large for the mol .
E. Acceleration re ucer setting too low.
4. Too much slag left in crucible
A. Alloy temperature too low.
B. Alloy soak timer exten e excessively.
C. Crucible not properly pre-heate prior to usage.
D. Crucible hol er worn permitting bottom of crucible to swing out uring acceleration.
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SPECIFICATIONS
ELECTROMATIC - 4 CASTING MACHINE
ITEM # N155700
SIZE OF MACHINE
Dimensions
Weight 597 lb. (270.44 kg)
Overall Height 57” (144.78 cm)*
Cabinet Height 35 3/4” (90.805 cm)
Wi th 38 1/2” (97.79 cm)
Depth 27 1/2” (69.85 cm)
*Inclu es Optical Ra iation Pyrometer an Bracket
ELECTRICAL SPECIFICATIONS
1. Input 200-250 volts AC, 50/60 Hz, 30 amps. Single phase.
2. Output 4.4 kW at 500 kHz.
3. Main Power, Circuit Breaker Protection.
4. Melt, Circuit Breaker Protection.
WATER AND DRAIN REQUIREMENTS
1. 3/8” water line with shut-off valve, 20 psi, 1.5gpm minimum.
2. Drainage facilities within five (5) feet (152.4 cm) of unit an not above the cabinet height of the unit (36” or
91.4 cm).
WATER COOLED
1. Tube
2. Melting Coil
3. Tank Coil
MELTING TIME
30 grams of new chrome-cobalt alloy in 40 secon s.
SAFETY
1. Centrifuge Cover electrically interlocke .
2. Front panel access electrically interlocke .
3. Five secon elay to lift the Melt Coil (with Coil Release Switch) after the centrifuge motor has been e-energize .
4. Melt Coil an Lift Lever inoperative (with Coil Release Switch) uring centrifuging cycle.
5. Start-Stop latching circuit that will unlatch in the event a power failure or overloa occurs within the Melt Circuit.
MODE OF OPERATION
Automatic or operator controlle .
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CENTRIFUGE
1. One quarter (1/4) horsepower, 180 volts DC electric motor.
2. Ball bearing supporte casting arm.
3. Belt riven pulley factory set at 400 rpm.
4. Continuously variable centrifuge acceleration control.
5. Casting arm balance controlle by a justable counterweight.
6. 30 secon s automatic centrifuge shut-off.
SOAK TIMER
Variable soli state timer 0-60 secon s for automatic soaking. Plug in instrument for easy repair access.
DIGITAL TEMPERATURE CONTROLLER
Automatic Mode
1. Optical Ra iation Pyrometer with soli state temperature controller.
A. Target size: 3/8" (9.53mm) iameter.
B. Response time: 1 secon .
2. Temperature range: 1900°F - 2900°F (1038°C - 1593°C).
Manual Mode
1. The operator controls rea iness of the alloy an casting.
NOISE LEVEL
Un er 70 B at one meter.
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MAINTENANCE
1. Daily Care
A. Clean casting well.
B. Remove all alloy splash with emphasis particularly on Melt Coil.
C. Check optical ra iation pyrometer a justments.
2. Weekly Care
A. Clean gui e ro s along with the crucible hol er sli es.
B. Establish a free movement of crucible carriage.
3. Monthly Care
A. Remove front panel an vacuum accumulate ust an irt insi e of the unit.
B. Check H.F. flexible lea s for parallelism an proper separation.
C. Inspect for water leaks an cleanliness of water filter cartri ge.
D. Check for water leaks.
4. Every 60 to 90 days
A. A just H.F. flexible lea s for parallelism an proper separation.
B. Check calibration of gri current.
REPLACEMENT PARTS
CATALOG # DESCRIPTION
N031106 Crucible.
N154501 Quartz Ro .
N154535 Sighting Crucible.
N154553 Crucible Tongs.
N154801 Carbon Dummy Mol .
N154861 No. 1, 1 1/4 Ring Hol er.
N154862 No. 2, 1 1/2 Ring Hol er.
N154863 No. 3, 1 3/4 Ring Hol er.
N154864 No. 4, 2 1/4 Ring Hol er.
N154865 No. 5, 2 3/4 Ring Hol er.
N154866 No. 6, 3” Ring Hol er.
N154867 No. 7, 3 1/4 Ring Hol er.
N154868 No. 8, 3 1/2 Ring Hol er.
N242903 Carbon Crucible Insert.
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CAUTION: Be sure Main POWER SWITCH is OFF