Pulser Peak And Background - Miller Syncrowave 200 Manual Del Propietário Y Guía

3-7. Pulser Peak And Background

1
Percent (%) Peak
Time Control Setting
(50%)
Balanced
More Time
At Peak
(80%)
Amperage
More Time
At
(20%)
Background
Amperage
4
0000 0000
5
Pulsed Output Waveforms
PPS
Bkg Amp
Peak Amp
1 Power Switch
2 Pulse Control
Push and hold Pulser button and turn
on power. Hold button for approxi-
mately 7 seconds.
3 Encoder Control
4 Volt And Ammeter
Press Pulse button to cycle parame-
ters (see Section 3-12 for parameter
3
ranges).
PPS (Pulses Per Second or Pulse
Frequency) is used to determine ap-
pearance of weld bead (See Section
3-6).
2
PEAK t [PKT] [50%]- The percentage
of each pulse cycle that can be spent
at the peak amperage level.
BKGND A [BKA] [50%] - (Background
Amps) - Use Background Amps to
set the low pulse of the weld amper-
age, which cools the weld puddle and
affects overall heat input. Back-
ground Amps is set as a percentage
of peak amperage.
Turn encoder to select appropriate
value for active pulse parameter. Val-
ue selected is shown on the amme-
ter.
5 Pulsed Output Waveforms
Example shows affect changing the
Peak Time control has on the pulsed
output waveform.
Peak amperage is set using the Main
Amps push button control (see Sec-
tion 3-3), or with a remote control.
Peak amperage is the highest weld-
ing amperage allowed to occur in the
pulse cycle. Weld penetration varies
directly with peak amperage.
Application:
Pulsed TIG welding involves switch-
ing the weld output between a high or
peak amperage, and a low or back-
ground amperage at a controlled rate
(see Section 3-6). The raised por-
tions of the weld output are controlled
in width, height, and frequency, form-
ing pulses of weld output. These
pulses and the lower amperage level
between them (called the back-
ground amperage) alternately heat
and cool the molten weld puddle. The
combined effect gives the operator
better control of penetration, bead
width, crowning, undercutting, and
heat input. Controls can be adjusted
while welding.
Pulsing can also be used for filler ma-
terial addition technique training.
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