Tweco A80 CutMaster - Manual (Page 31)

CUTMASTER A80
Manual 0-4985 OPERATION 4-1
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 higher for 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 or me-
chanical cuts. (Does not apply to automation). 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 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.
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 section 5
for explanations of fault lights.
10. Pressure Indicators
The Indicators will illuminate according to the pressure set
by the Pressure Control Knob (number 4).