Tweco 20mm Cutmaster - Manual (Page 29)

CUTMASTER 20mm
Manual 0-5078 4-1 OPERATION
SECTION 4 SYSTEM:
OPERATION
4.01 Front Panel Controls /
Features
See Illustration for numbering Identification
1. Output Current Control
Sets the desired output current. Output settings
up to 60 Amps may be used for drag cutting (with
the torch tip contacting the workpiece) or standoff
cutting.
2. Function Control
Function Control Knob, Used to select between the
different operating modes.
SET Used to purge the air through the unit
and torch and leads and to adjust gas pressure.
RUN Used for general cutting operations
RAPID AUTO RESTART Allows for faster
restarting of the Pilot Arc for uninterrupted cutting.
LATCH Used for longer hand held cuts.
Once a cutting arc is established, the torch switch
can be released. The cutting arc will remain ON
until the torch is lifted away from the work piece,
the torch leaves the edge of the work piece the torch
switch is activated again or if one of the system
interlocks is activated.
3. ON OFF Power Switch
ON / OFF Switch controls input power to the
power supply. Up is ON, down is OFF.
4. Air/Gas Pressure Control
The Pressure
+
Control is used in the "SET"
mode to adjust the air/gas pressure. Pull the knob
out to adjust and push in to lock.
5. AC Indicator
Steady light indicates power supply is ready for
operation. Blinking light indicates unit is in pro-
tective interlock mode. Shut unit OFF, shut OFF or
disconnect input power, correct the fault, and restart
the unit. Refer to Section 5 for details.
A
+
PSI BAR
MAX MAX
MIN MIN
!
1 2 3 4
5 6 7 8 9
Art# A-07886
MIN MAX
10
6. Temp Indicator
Indicator is normally OFF. Indicator is ON when
internal temperature exceeds normal limits. Let the
unit cool before continuing operation.
7. Gas Indicator
Indicator is ON when minimum input gas pressure
for power supply operation is present. Minimum
pressure for power supply operation is not sufficient
for torch operation.
8. DC Indicator
Indicator is ON when DC output circuit is active.
9.
!
Fault Error Indicator
Indicator is ON when Fault circuit is active. See sec-
tion 5 for explanations of fault lights.
10. Pressure Indicators
PSI BAR
MAX MAX
MIN MIN
80
75
70
65 5.5
85 5.9
90 6.3
5.2
4.8
4.5
Art # A-08170
The Indicators will illuminate
according to the pressure set by the Pressure Control
Knob (number 4).