Owner`s manual

OM-172 324 Page 35
SECTION 7 – TEACHING A PULSE WELDING PROGRAM
Control circuit and interface operational power are On
when using or changing the microprocessor settings.
See GMAW-P (Pulsed MIG) Process Guide supplied with unit for more
information.
NOTE
7-1. Pulse Waveforms And Explanation Of Terms
The interface, not the welding pow-
er source, controls weld output for
pulsed welds.
1 ApK – Peak Current Of
100-565 Amperes
ApK is the high pulse of welding
current. Peak current melts the
welding wire and forms a droplet.
The droplet is forced into the weld
puddle.
2 AbK – Background Current Of
10-200 Amperes
AbK is the low weld current. Back-
ground current preheats welding
wire and maintains the arc. When
background current is too low, the
arc is unstable and hard to
maintain.
3 PPS – Pulses Per Second Of
20-400
PPS, pulse rate, and frequency
(Hz) are used interchangeably. A
PPS or pulse rate of 60 Hz means
60 pulses of current are produced
each second.
4 PWms – Pulse Width Of
1.0-5.0 Milliseconds
PWms is the time spent at peak cur-
rent (1.2 ms is .0012 seconds). This
time must be long enough to form a
droplet of welding wire. The stif-
fness or fluidity of the molten weld
puddle is controlled by PWms.
Ref. S-0259
3
2 41
Amps (Current)
Time