Section IV. OPERATING UNDER USUAL CONDITIONS
Tungsten electrode size
a. The instructions in this section are published
for the information and guidance of the personnel
responsible for operation of the welding machine.
b. The operator must know how to perform
every operation of which the welding machine is
c a p a b l e . This section gives instructions on
starting and stopping the welding machine, basic
capabilities of the welding machine, and various
settings of controls to enable the welding machine
to perform different types of welding for which it
c. Test for proper setting, Use a sample piece of
is designed. Since nearly every job presents a dif-
metal, like the metal to be welded and adjust the
ferent problem, the operator may have to vary
welding amperage to produce the correct arc nec-
given procedures to fit the individual job.
essary for the welding to be done.
Warning: Do not come in contact with the
electrode while the welding machine is operating.
a. Preparation for Starting.
The high voltage generated by the machine can
cause death by electrocution.
(1) Perform the necessary daily preventive
maintenance checks and services ( para 35 ).
the welding machine.
(2) Clean area on item to be welded to make a
Warning: Before operating the welding ma-
chine see that the ground terminal lug is con-
(3) Connect the ground clamp.
nected through the input cable or by separate con-
ductor to the power system ground. An un-
start the welding machine.
grounded welding machine can cause death by
electrocution to personnel coming in contact with
Note. This welding machine is equipped with a remote
receptacle and can be operated by remote control. When
using remote control, the panel control-remote centrol
b. Remove ground clamp from item which was
switch must be in the remote control position. When re-
mote control is used, the maximum current available will
be limited by the setting of the output panel rheostat, If
full range is necessary, the panel output control rheostat
must be set wide open. The welding machine is also
equipped with a remote contactor control receptacle for
activation of the contactor by a foot switch and a remote
Refer to table 21 and select
contactor receptacle for activation of the contactor by an
external 115 volt ac source.