TM 5-3431-203-15
Section IV. OPERATION OF EQUIPMENT
2-10. General
a. The instructions in this section are pub-
lished for the information and guidance of the
personnel responsible for the operation of the
welding machine.
b. The operator must know how to perform
every operation of which the welding machine
is capable. This section gives instructions on
starting and stopping the welding machine,
and various settings of controls to enable the
welding machine to perform different types
of welding for which it is designed,. Since
nearly every job presents a different problem,
the operator may have to vary given proce-
dures to fit the individual job.
Caution: When using the machine for high
frequency welding, high frequency emission
may result in communication interference if
the machine is not properly grounded.
2-11. Starting
a. Preparation for Starting.
(1) Perform the daily preventive mainte-
nance Services (para 3-7).
(2) Clean area on item to be welded to in-
sure a good connection.
(3) Connect the ground clamp of the
load (work) cable to the work table
or item to be welded.
b. Starting. Refer to figure 2-4 for start-
ing instructions.
Figure 2-4. Starting the welding machine,
2-12. Stopping
Table 1-1. Electrode Size for Applied Current
in-
a. Refer to figure 2-5 for stopping
structions.
Tungsten
electrode
Welding current
(amperes)
size (diameter)
b. Remove the ground clamp from the item
being welded.
40
-
60
0.040 in.
50
-
100
3/32
100
-
160
1/16
2-13. Welding Machine Operation
150
-
210
1/8
200
-
275
5/32
a. Start the welding machine (para 2-11).
250
-
350
3/16
b. Refer to table 1-1 and select the proper
325
-
475
1/4
electrode for inert gas welding.