General Description; Initial Operation - Migatronic Commander Instruction Manual

GENERAL DESCRIPTION

The COMMANDER is a three-phase welding machine
based on inverter technology.
Block diagram COMMANDER DC
Block diagram COMMANDER AC/DC
There are several versions of the machine: MMA, TIG
DC and TIG AC/DC.
All versions are designed for welding with coated
electrodes and are equipped with Hot-start, Arc Power
and Antifreeze. In addition, all versions can be fitted
with all types of remote controls included in
MIGATRONIC's standard range of accessories.
The TIG COMMANDER machine is also designed for
TIG welding and features functions such as:
- variable slope-down
- fixed gas pre-flow time
- variable gas post-flow time
- option of 2-times or 4-times operation
- LIFTIG
- HF-TIG
- current control from the TIG torch handle
- remote control facility
- AC balance
- AC welding frequency
- Digital display
In LIFTIG ignition the TIG arc is ignited after making
contact between the workpiece and the tungsten
electrode, after which the trigger is activated and the
arc is established by lifting the electrode from the
workpiece.
In HF-TIG ignition the TIG arc is ignited without
contact. A high-frequency (HF) impulse initiates the
arc when the trigger is activated.

INITIAL OPERATION

Mains connection
After the mains cable has been connected, the
machine is ready for use. Please note that connection
must be made by an authorised electrician.
As standard, machines are supplied for connection to
a 3x400 V supply. However, machines with an auto-
transformer unit can be connected to other voltages.
Connection is made by moving the wires on the top of
the auto-transformer. All three phases have to be
connected similarly and in accordance with the wiring
diagram on the top of the auto-transformer unit and/or
the circuit diagram on page 30. Only machines up to
400 A output can be supplied with an auto-
transformer, and a 230V connection can only be used
on machines of up to 320 A output.
Warning: When making input voltage connection it
is essential that the machine is dis-
connected from the mains supply, as this
work can
because of the high voltages across the
connection terminals.
Fuse and mains voltage - see the type plate and
technical data.
Configuration:
MIGATRONIC disclaims all responsibility for damaged
cables and other damages related to welding with
under sized welding torch and welding cables
measured by welding specifications e.g. in relation to
permissible load.
Connection of welding cables
Connect the welding cables to the front of the
machine. Please note that the plug must be turned 45
degrees after inserting the cable into the socket -
otherwise the plug can be damaged due to excessive
contact resistance.
Cooling liquid
Before the machine is switched on, the water-cooling
module must be filled up with MIGATRONIC coolant.
(This applies only to water-cooled machines).
5
be extremely dangerous