Sigma 300 Compact Manuel D'instruction page 17

Connection of electrode holder for MMA
The electrode holder and return current cable are
connected to plus connection (10) and minus
connection (8). Observe the instructions from the
electrode supplier when selecting polarity.
Control of cooling liquid
If the machine is delivered with an integrated torch
cooling module, it will be necessary to inspect the
cooling liquid level by means of the level control (11).
Refillment of cooling liquid takes place through the
filler neck (12).
Adjustment of wire brake
The wire brake must ensure that the wire reel brakes
sufficiently quickly when welding stops. The required
brake force is dependent on the weight of the wire reel
and the maximum wire feed speed. A brake torque of
1.5-2.0 Nm will be satisfactory for most applications.
Adjustment:
Dismount the control knob by
-
placing a thin screw driver
behind the knob
thereafter pull it out
Adjust the wire brake by
-
fastening or loosening the
self-locking nut on the axle of
the wire hub
- Remount the knob by pressing it back into the
groove.
Switch on Press  Weld
The machine is almost ready to use
Switch on the welding machine

on the main switch (2)
Select welding program

A welding program must be selected in relation to
welding wire, shielding gas or possible electrode.
Please read how this should be selected on your
welding machine in the quick guide.
Adjust the welding current

Please read your quickguide
Weld

Use of double wire feed units
It is possible to use different welding wires and
shielding gasses in the two wire feed units.
It is not possible to weld with the two wire feed units at
the same time.
Welding hoses
Both welding hoses must be of same type e.g. 2xMIG
®
Manager hoses.
WARNING
There is voltage on the welding wire in both
MIG torches when pressing the torch trigge
and
r
The inactive wire feed unit is ready for welding after a
short pressure on one of the key pads with flashing
indicator (please see illustration) or with a short
pressure on the torch trigger.
It may happen that both wire feed units are inactive
the first time the machine is turned on (the indicators
near the key pads flash on and off).
Then the required wire feed unit should be activated
as mentioned above. The other wire feed unit must
remain inactive before it can be selected.
Trolley with automatic mains voltage transition
(Special equipment)
The machine can be delivered with a trolley with a
unit, which automatically adjusts the actual mains
voltage on the working area. With this transition unit
the machine can be connected to 3*230V, 3*400V,
3*440V, and 3*500V.
The auto-transformer can be switched on and off on
the mains switch (13). An energy conservation
function disconnects the welding machine, if the
machine has not been used for 40 minutes. The auto-
transformer can be switched on again by pressing the
key pad (14) on the auto-transformer unit. The stand-
by function can be permantly disconnected by a
technician when requested.
17