BOC MIG 250C - Page 26

26
BOC Smootharc Advance II MIG 250C Operating manual
Electrical stickout
The electrical stickout is the distance between the end of the contact
tip and the end of the wire. An increase in the electrical stickout results
in an increase in the electrical resistance. The resultant increase in
temperature has a positive inuence in the melt-o󹟽 rate of the wire that
will have an inuence on the weldbead prole.
Inuence of the change in electrical stickout length on the weldbead
prole.
The travel speed will have an inuence on the weldbead prole and the
reinforcement height.
If the travel speed is too slow a wide weldbead with excessive rollover
will result. Contrary if the travel speed is too high a narrow weldbead
with excessive reinforcement will result.
Recommendation about travel speed are contained in the detailed gases
datasheets found on pages 14-15 of this manual.
Electrical stickout
Short Normal Long
Short Normal Lon
g
Travel speed
Slow Normal Fast
Slow Normal Fast