Miller Electric 625 - Manual (Page 28)

OM-216 244 Page 24
SECTION 7 − OPERATION - STUD GUN
Y Disconnect gun from power source
before installing or removing compo-
nents.
The stud gun automates the stud welding
process.
Several key functions are:
• Holds the ferrule, spark shield or gas de-
livery system
• Holds the stud
• Strikes the arc
• Establishes the arc length (lift distance)
• Thru the power source, the gun controls
the arc time
• Controls rate of plunge of the stud into
the base metal
7-1. Stud Gun Tool Functions
.
Before welding it is important to review
the set up. Correct set up will produce
the best welding results. Approximately
95% of all stud welding problems are
due to improper gun set up or power set-
tings.
Welding Procedures:
• Place stud to be welded into weld chuck.
• Insert a ferrule into the ferrule grip (this
step is not necessary if using a spark shield)
• Position end of stud in location to be
welded.
• Press gun downward so the ferrule is sit-
ting on the base metal.
• Pull trigger to begin weld sequence.
• Hold gun still during the arcing process.
• After weld is complete, continue to hold
the gun still for 1 second to allow the molten
metal to solidify.
• Remove the gun from the welded stud.
Be sure and pull the gun straight off of the
welded stud to prevent damage to the weld
chuck.
• Break away the ferrule and inspect the
weld. (Only applies if ferrule was used)
7-2. Stud Welding Procedures
Position tool
against work
Press tool towards
work until ferrule
is against work
Ferrule