Tweco 3000 Merlin - Manual (Page 34)

OPERATION 4-2 Manual 0-2532
B. Control Front Panel
NOTE
This hinged panel is the access cover to the
Logic Control PC Board.
1. ON/OFF Switch
ON position activates all system control circuits when
remote or CNC enable is ON.
OFF position deactivates control circuits.
2. RUN/SET/PURGE Switch
RUN position is used for torch operation.
SET position is used for setting gas pressures.
PURGE position is for purging the plasma gas line.
3. Current Control
Selects output current from 50 to 150 amps for ap-
plications on various materials and thicknesses. Cur-
rent control is disabled when Remote Control is used.
4. AC Power Indicator
Green light indicates AC power is being supplied to
the system when the ON/OFF switch is in ON posi-
tion.
OFF
ON RUN
PURGE
SET
A-00887
AMPS
50
75
150
125
100
AC TEMP GAS PRES.
COOLANT
COND. DC PILOT
1 2
3
4
5 6 7 8
9
10
Figure 4-3 Front Control Panel
5. TEMP Indicator
Green light indicates proper operating temperature.
Red light indicates overheating. Unit must be allowed
to cool.
6. GAS Indicator
In SET position, yellow light in SET mode indicates
gas pressure switches are satisfied when gas is flow-
ing to the torch. Light goes out in PURGE or RUN
mode.
7. Coolant Pressure Indicator
Yellow light indicates adequate coolant flow.
8. Coolant Conductivity Indicator
Yellow light indicates proper coolant conductivity.
Light out indicates excessive coolant conductivity (re-
sistivity less than 0.1 MW). Replace coolant and de-
ionizer cartridge.
9. DC Indicator
Yellow light indicates main contactor closure supply-
ing voltage to the power supply output and cutting
current is available. Start signal must be applied.
10. PILOT Indicator
Yellow light indicates pilot arc contactor closure. Light
goes out when cutting arc is established and comes
back on if cutting arc is interrupted. Refer to Section
4.07-A and -B, Auto Restart Function.
C. Gauge Front Panel
Figure 4-4 Merlin 3000 Upper Gauge Panel
1. Secondary Pressure Control
Adjusts secondary gas pressure. Pull knob out and
turn clockwise to increase secondary pressure to de-
sired level.
2. Secondary Pressure Gauge
Displays secondary pressure from 0 - 100 psi (0 - 6.9
bar).
3. Secondary Mode Selector
Selects secondary mode to gas, oxygen (no second-
ary), or water.
NOTE
This switch must be in the gas (cylinder sym-
bol) mode for all secondary gases when the
Gas Control Option is installed.
4. Coolant Pressure Gauge
Displays coolant pressure from 0 - 160 psi (0 - 11.0
bar).
5. Plasma Pressure Gauge
Displays plasma gas pressure from 0 - 100 psi
(0 - 6.9 bar).