1) Encoder
–
All of the welding parameters are adjusted
using the encoder. Turning the encoder clockwise increases
the setting and counter clockwise decreases it. The encoder
adjusts all of the functions of your 221.
2) Function Button
–
the function button allows you to
select between the 7 different welding parameters. The
default setting is A (2D) amperage. When the green light is
illuminated under the “A” setting (2D) as shown in Photo 1,
you can adjust the amperage using the Encoder (1). The
amp
er
age can be adjusted between 4 and 220 amps in any of
the T
IG
welding modes and between 4 and 200 amps in the
stick welding mode.
2A – Pre Gas
–
Depressing the function button until the
“pre gas” light (2A) is illuminated will allow you to adjust the
pre-gas setting. As shown in Fig 4, the pre gas light (2A) is
illuminated and the amps display will flash “PrG”. While the
display is flashing, the pre gas time will be displayed in the
“AMPS” digital display in seconds. Use the encoder to
adjust the pre
-
gas from .1 sec to 2.0 sec in .1 sec increments
while the display is flashing.
Pre
-
gas is the amount of time the gas flows before the
arc has been ignited. This ensures there will be no weld
contamination from air, since the weld area will be purged with
shielding gas prior to welding. A good starting value is .4 sec.
Welding Parameter Section
Front Panel Controls
The front panel controls will be split into 2 sections – the welding
mode
section and the welding
parameter
section. The welding mode section covers the different welding modes – such as Stick Welding, T
IG
2T
welding and so on. The welding parameter section covers all the different adjustments such as pre-gas, post
gas, slope down and so on.
4
3
2
1
F
E
D
4a
4b
2a 2b 2c 2d 2e 2f 2g
C
B
A
D1
D2
D3
D4
D5
Figure 4
2a
6
2
1
