NS-40 Manual
Page 6
729-110-036
Revision 1.14
August 2013
SEQUENCE OF OPERATIONS
Welding Gun
1.
Mainspring (1) is partially compressed and
lifting rod (5) slides through lifting ring (4) as
the gun is placed in weld position.
2.
Pressing gun trigger button energizes gun coil
(2).
3.
The gun coil (2) pulls the movable core
assembly (3), causing the lifting hook of the
movable core assembly to cock the lifting ring
(4) on the lifting rod (5).
4.
At the same time, the lifting ring spring (6) and
core spring (7) are compressed.
5.
The cocked ring locks on the lifting rod, and
the movable core assembly "lifts" or pulls back
the entire assembly, including the stud (see
Figure 7).
6.
When the stud is "lifted" from the work, an arc
is initiated.
7.
The assembly remains "lifted" for a preset time
period.
8.
At the end of this time period, the gun coil (2)
is de-energized.
9.
The movable core assembly (3) is returned to
normal position by the core spring (7).
10.
The lifting ring (4) is uncocked by the lifting
hook and lifting ring spring (6).
11.
The mainspring (1) returns the assembly to
normal position, and this action “plunges” the
molten end of the stud into a pool of molten
metal on the base plate, thus completing the
weld.
Figure 6: Gun mechanism in normal position
Figure 7: Gun mechanism in lifted position
