Plunge Adjustment - Miller Powcon Arc Stud 625 Owner's Manual

5-7. Plunge Adjustment

2
Notes
OM-216 244 Page 18
1
Plunge Settings When Using Ferrules
Plunge controls the amount of stud that is
melted during the arc time. Too much plunge
and the f illet will overf ill the ferrule or create
excessive splatter when using a spark
shield. Too little plunge and there may be in-
complete f illet 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.
Stud Diameter Plunge
0 - .25 .094
.25 - .625 .125
.75 and up .188
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 f lux load.
.
These instructions are for standard fer-
rules. For reduced f illet ferrules (only
recommended for very specif ic 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 f langed
style studs. For standard time duration Gas
Short Arc the plunge should be set at about
2 f lange thicknesses or 0.08 in (2 mm).