Arc/Balance Control; Optional Controls (For Gtaw Only) - Miller Syncrowave 351 Owner's Manual

4-2. Arc/Balance Control

Setting
Balanced
30
More Penetration
100
More Cleaning
0

4-3. Optional Controls (For GTAW Only)

Preflow/Spot Timer Controls:
1 Preflow Time Control And Switch
Control sets length of time that gas flows be-
fore arc starts.
2 Spot Time Control And Switch
Control sets spot weld time. Timer begins
when arc starts. If arc is broken during spot
time cycle, timer stops but does not reset.
When spot time ends, arc stops and timer re-
sets for next cycle.
Start Controls/Crater Fill Controls:
3 Start Amperage Control
4 Start Time Control
Balance Control Examples
Output Waveforms
50% Electrode
Positive
50% Electrode
Negative
32% Electrode
Positive
68% Electrode
Negative
55% Electrode
Positive
45% Electrode
Negative
1
2
3
4
5
5 Start Control Switch
Use start control to select a starting amper-
age that is different from the weld amperage.
Start Amperage control can be adjusted from
0 to 400 A (100% = 400 A).
For example, to select start amperage of 300
A for 3 seconds and weld amperage of 200
A: Set start Amperage control to 75 (75% of
400 A = 300 A), set start time control to 3, and
set front panel or remote amperage control
to 200 A.
6 Crater Fill Control And Switch
Arc Control (DC SMAW):
Control helps arc starting or making
vertical or overhead welds by in-
creasing amperage at low arc volt-
Arc
age.
When set at 0, short-circuit amper-
age at low arc voltage is the same
as normal welding amperage.
When setting is increased, short-
circuit amperage at low arc voltage
increases.
Balance Control (AC):
Control changes the ac output
square wave.
Adjust setting for deeper penetra-
tion or more cleaning action. Posi-
tion 30 (balanced) is a recom-
mended starting point for GTAW.
10
9
8
7
6
Control sets length of time to taper weld out-
put from weld amperage setting to 0 A.
.
Be sure to set Postflow control for a
longer period of time than the Crater Fill
control.
Pulser Controls:
7 Background Amperage Control
8 Pulses Per Second Control
9 % On Time
10 Pulser On/Off Switch
Use controls to set pulsing parameters (see
Section 4-4 for more information).
Ref. S-0795-A
Ref. ST-154 795-B
TM-354 Page 19