Tweco 400 MST Arc Master - Manual (Page 24)

400MST
3
OPERATOR CONTROLS
3 – 5
4.6 Weld Parameters
Table 3-4: Weld Parameters
4.7 Power Source Features
Weld
Parameter
Parameter
Range
Factory
Setting
Units of
Increment
Weld Mode
STICK MIG
LIFT
TIG
WELD (V)
MIG 10.0 to
36.0V DC
17.0V 0.1V 8 9 8
INDUCT-
ANCE
0 to 100% 10% 1% 8 9 8
HOT
START
0 to 70A 20A 1A 9 8 8
WELD (A)
TIG or
STICK
1 to 400A
DC
80A 1A 9 8 9
ARC
CONTROL
0 to 100% 10% 1% 9 8 8
Feature Description
New Digital
Control  All welding parameters are adjust-
able.
Touch Panel
Switches  Touch switches eliminate mechani-
cal damage.
Front Control
Cover  Protects front panel controls.
Digital Meter Volt
& Ammeter  Displays selected weld parameter
value.
 Displays average weld current
when welding.
 Displays average weld current for
20 seconds after weld has been
completed.
 A selected weld parameter value
can be adjusted at any time even
while welding.
Intelligent Fan
Control  The intelligent cooling system is
designed to reduce dust and for-
eign material build-up, while provid-
ing optimum cooling.
 Fan speed reduces approximately
30 seconds after machine is turned
on.
 Fan speed increases when internal
components reach operating
temperature.
ON/OFF switch  Mains ON/OFF switch located on
rear panel.
Voltage
Reduction Device
(VRD)  VRD fully complies to IEC 60974-1.
 VRD light is ON and operational
when in STICK mode.
Control Knob  For the selected weld parameter,
rotating the knob clockwise
increases the parameter.
 Rotating the knob counter clock-
wise decreases the parameter.
 A selected weld parameter value
can be adjusted at any time even
while welding.
 Pushing the knob in sets the
selected parameter then displays
the next parameter.
Self Diagnosis
Using Error
Codes  An error code is displayed on the
Digital Meter when a problem
occurs with Mains supply voltage or
internal component problems.
Save/Load
function  A total number of 5 programs can
be saved into the 400MST memory.
SAVE the Current Weld Parameters
into Memory
 Press the SAVE button.
 Select a memory location by rotat-
ing the control knob, 1 to 5 is dis-
played on the meter.
 After selecting the desired memory
location (ie. 1 to 5), press the
parameter button and the machine
give a beep to confirm the weld
parameters from the control panel
are saved.
LOAD (retrieve) a Program to
Control Panel
 Press the LOAD button.
 Select a memory location by rotat-
ing the control knob, 1 to 5 is dis-
played on the meter.
After selecting the desired memory
location (ie. 1 to 5), press the
parameter button and the machine
give a beep to confirm the weld
parameters are loaded onto the
control panel.
Feature Description