Transmig 210, 250, 310, 330
DOC No: MIGTRN0001 Page 7 of 31
Issue No: 2 Date: 14/09/98
1. INTRODUCTION
The Transmig 210, 250, 310 and 330 are semi-automatic Gas Metal Arc Welder (GMAW-commonly
MIG) with either integrated or separate wire feed unit. These products are designed to meet the broad
operating needs of the metal fabrication industry where production efficiency is vital. They are designed
and manufactured in Australia to Australian Standard AS1966.1-1985.
The Transmig range gives excellent performance on mild steel, stainless steel, aluminium, silicon bronze
and some hard facing wires with the Argon based of shielding gases. The Transmig range also gives
excellent results on mild steel using CO
2
(carbon dioxide) shielding gas.
The Transmig Plants are supplied as a complete welding package (apart from gas cylinder and electrode
wire). The following instructions detail how to correctly set up your new Transmig and give guidelines on
gaining the best production efficiency. Please read these instructions thoroughly before using your
Transmig.
1.1 Duty Cycle
The rated duty cycle
of a welding Power
Source is the
operating time it may
be used at its rated
output current with-
out exceeding the
temperature limits of
the insulation of the
component parts. In
Australia a duty cycle
period of 5 minutes is
specified in Australian
Standard AS 1966
Part 1-1985. To
explain the 5 minute
duty cycle period the following example is used. Suppose a welding Power Source is designed to
operate at 30% duty cycle, 250 amperes at 26 volts. This means that it has been designed and built
to provide the rated amperage (250A) at the rated voltage (26V), for 1.5 minutes out of every 5
minute period (30% of 5 minutes is 1.5 minutes). During the other 3.5 minutes of the 5 minute
period the Power Source must idle and be allowed to cool. The thermal cut-out will operate if the
duty cycle is exceeded.
CAUTION 1: The above times are not accumulative.
0
10
20
30
40
50
60
70
80
90
100
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
Welding Current (amp)
Duty Cycle (percentage)
330
Transmig 210
Transmig 250
Safe
Operating
Region
210
250
Transmig 310
Transmig 330
Figure 1 - Transmig duty cycle curves
