Miller Electric 625 - Manual (Page 22)

OM-216 244 Page 18
Plunge Settings When Using Ferrules
Plunge controls the amount of stud that is
melted during the arc time. Too much plunge
and the fillet will overfill the ferrule or create
excessive splatter when using a spark
shield. Too little plunge and there may be in-
complete fillet formation. There should be
approximately 1/8 of an inch of stud protrud-
ing past the end of the ferrule. A bit less for
smaller studs, a bit more for larger studs.
1 Set Screw
2 Plunge Depth
To adjust plunge, loosen leg set screws on
gun body. Move foot towards gun or away
from gun to increase or decrease plunge.
Plunge measurements are from end of stud
and do not include the flux load.
.
These instructions are for standard fer-
rules. For reduced fillet ferrules (only
recommended for very specific applica-
tions) decrease the amount of plunge by
half.
Plunge Settings For Short Arc or Gas Arc
Stud Welding
For Short Arc or Gas Short Arc the stud
should protrude past the end of the spark
shield by about 0.04 in (1 mm). This is about
the same as the flange thickness on flanged
style studs. For standard time duration Gas
Short Arc the plunge should be set at about
2 flange thicknesses or 0.08 in (2 mm).
5-7. Plunge Adjustment
1
Plunge Stud Diameter
.25 - .625
.75 and up
.125
.188
2
0 - .25 .094
Notes