Lincoln Electric POWER FEED 25M NNS Operator's Manual page 25

POWER FEED™ 25M NNS
WAVE CONTROL
Wave Control is used to adjust the arc for exact preferences. The wave control functions vary for different processes and weld modes.
Process Wave Control
Name
SMAW
Arc Force
(Stick)
GMAW
Pinch
(MIG) and
FCAW
(Flux-cored)
GMAW-P (Pulsed
Ultimarc
MIG), Steel and
Stainless
Effect / Range
Description
Arc Force adjusts the short circuit current for a soft arc, or for a forceful, driving
arc. It helps to prevent sticking and shorting of organic coated electrodes, partic-
Soft (-10.0) to
ularity globular transfer types such as stainless and low hydrogen. Arc Force is
Crisp (10.0)
especially effective for root pass on pipe with stainless electrode and helps to
minimize spatter for certain electrodes and procedure as with low hydrogen, etc.
Pinch controls the arc characteristics when short-arc welding.
Soft (-10.0) to
Crisp (10.0)
Ultimarc regulates the focus or shape of the arc. Ultimarc values greater than
0.0 increase the pulse frequency while decreasing the background current,
resulting in a tight, stiff arc best for high speed sheet metal welding. Ultimarc
values less than 0.0 decrease the pulse frequency while increasing the back-
ground current, for a soft arc good for out-of-position welding.
Soft (-10.0) to
Stiff (10.0)
Arc Control -10.0
Low Frequency, Wide
For Pulse modes, Arc Control changes the pulsing frequency. When the frequen-
cy changes, the Power Wave system automatically adjusts the background cur-
rent to maintain a similar heat input into the weld. Low frequencies give more
control over the puddle and high frequencies minimize spatter.
B 10
Arc Control OFF
Arc Control +10.0
Medium Frequency and Width
High Frequency, Focused
OPERATION