TM 5-3431-225-15
Section IV. OPERATION OF EQUIPMENT
2-10. General
a. The instructions in this section are published
for the information and guidance of the person-
nel 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 start-
ing and stopping the welding machine, and var-
ious 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 procedures to fit the individual
job.
Caution: When using the machine for high
frequency welding, high frequency emission may
result in communication interference if the ma-
chine is not properly grounded.
2-11. Starting
a. Preparation for Starting.
(1) Perform the daily preventive mainte-
nance services (para 3-5).
(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. Stating. Refer to figure 2-4 for starting
instructions.
2-12. Stopping
tions.
b. Remove the ground clamp from the item
being welded.
2-13. Welding Machine Operation
a. Start the welding machine (para 2-11).
electrode for inert gas welding.
Caution: Do not operate the Current Range
Switch or the AC/DC Selector and Polarity
Switch under load. Arcing caused by opening
the switch carrying high current will severely
burn the contact surfaces of the switch. This
burning of the contact surfaces will decrease
the maximum current carrying capacity of the
switch and possibly cause the switch to become
inoperative.
