IMA 474
DC-400
Page 17
NOTE:
If both stick and semiautomatic welding are to be
done on the same workpiece, it is not necessary to have
separate work cables for stick and semiautomatic welding
and only one work lead is required. To do this, connect a
95mm
2
jumper from the work terminal on the
semiautomatic side to the terminal to be used for work on
the stick side. The work lead from the semiautomatic side
then serves as the work lead for both semiautomatic and
stick welding.
To change stick polarity, reverse the leads at the (+) and (-
) terminals on the right side of the Multi-Process Switch.
OPERATION
The operation of the switch is as follows:
There are three positions on the switch. With the switch in
the left position, the wire feed terminals are electrode
negative. In the centre position, the wire feeder terminals
are electrode positive. In both the left and centre switch
position, the right side stick terminals are disconnected. In
the right switch position, the wire feed terminals are
disconnected from the DC-400 and the stick terminals are
connected. The polarity of the stick terminals is marked on
the end of the box.
To change stick welding/gouging
polarity, the electrode and work leads must be
interchanged. In the stick position, the stick terminals are
energised at all times.
OPERATING INSTRUCTIONS
Safety Precautions
When using a DC-400 power source with wire feeders
which do not have an electrical trigger interlock (or with
wire feeders with the electrical trigger interlock in the OFF
position), there will be a small spark if the electrode
contacts the work or ground within several seconds after
releasing the trigger.
When used with some wire feeders with the electrical
trigger interlock in the ON position, the arc can restart if the
electrode touches the work or ground during these several
seconds.
STICK, TIG OR AIR/CARBON ARC
*
a) Turn off all power.
b) Disconnect all wire feed unit control, electrode, and
work leads.
c) Place MODE SWITCH in the “CONSTANT CURRENT
(STICK/TIG)” for air carbon arc.
d) For stick, TIG or air carbon arc, place OUTPUT
TERMINALS switch into the “ON” position. With the
DC-400 connected for stick, TIG or air carbon arc
welding, the output terminals will be energised at all
times.
*
If stick welding, TIG welding or air carbon arc cutting is
to be done on the DC-400 along with semiautomatic
/automatic welding, then a K804-1 Multi-Process Switch
is required. If the Multi-Process Switch is not used,
then all control, electrode, and work leads to wire feed
equipment must be disconnected from the DC-400
before connecting the DC-400 for stick or air carbon arc
cutting.
WORK
ELECTRODE
To semi-
auto or
auto
equipment
To stick
electrode
holder or
air carbon
arc torch
User supplied
95 mm
2
+
jumper
Be sure to select OUTPUT TERMINALS “REMOTE
ON/OFF” for operation with wire feeders that have
leads numbered 2 and 4.
WARNING
ELECTRIC SHOCK can kill
•
Have an electrician install and service this equipment..
•
Turn the input power off at the fuse box before working
on equipment.
•
Do not touch electrically hot parts.
•
This next section applies to DC-400’s without the
Capacitor Discharge Option:
WARNING
MULTI-PROCESS SWITCH
ARC WELDING SUPPLIES - 07 847 7870
