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 op-
eration. Blinking light indicates unit is in protective
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).
ARC WELDING SUPPLIES - 07 847 7870
