Lincoln International PRECISION TIG 225 - Manual (Page 3)

Precision TIG ® 225 | [ 3 ]
“Set It/See It” Pulse Control —
Make attractive and consistent welds!
What Is It?
Pulse welding systems vary weld current between peak (high heat) and
background current (low heat) levels. Adjusting the pulse frequency
controls the level of heat input applied to the weld relative to the weld
travel speed. For the Precision TIG
® 225, pulse frequency can be varied
from 0.1 to 20 pulses per second.
Results
Better control of heat input in the weld, resulting in:
• Reduced warping and burnthrough on thin materials.
• Smaller heat-affected zone.
• Smaller bead profile without compromising proper penetration.
Great For
• Thin materials – Faster pulse settings help to narrow the bead
profile and minimize the heat-affected zone and resulting warping
or burnthrough.
• Consistent appearance – Slower pulse settings aid in timing the
application of filler metal to produce the consistent stacked bead
appearance associated with high quality TIG
welding.
• Maintaining a steady welding rhythm.
Easy Operation:
• Flashing indicator light lets you see the
pulse rate before you strike an arc.
W
el
d
in
g
c
ur
re
nt
Peak
Background
pulsE FrEquEncy:
number of pulses per second
Time
High Heat
(Peak)
Low Heat
(Background)
Pulsed TIG Weld
(at 60 amps)
Standard TIG Weld
(at 60 amps)
Smaller Heat
Affected Zone
Smaller Heat
Affected Zone
Smaller Bead Profile Smaller Bead Profile
AC Auto Balance ® Controls —
Automatically sets the optimal cleaning vs. penetration
level for aluminum welding!
What Is It?
When aluminum welding, the positive (+) portion of the AC welding
amperage cleans the oxides from the aluminum surface. The negative (-)
portion delivers more heat input, increasing penetration level.
Patented AC Auto Balance ® automatically sets the ratio of
cleaning action (+) versus penetration (-) based on amperage.
Manual balance control provides the flexibility to customize
the arc to your preference.
Easy Operation:
• Set it and forget it or override when you choose to customize
the settings.
More Cleaning (+)
Less Cleaning (+)
Less Penetration(-)
More Penetration (-)
W
E
ld
In
g
A
M
p
E
r
A
g
E
W
E
ld
In
g
A
M
p
E
r
A
g
E
TIME
TIME
Maximum Cleaning Setting Maximum Penetration
Setting
Auto-Balance Setting
A CLOSER LOOK