18
TIG WELDING WITH SPOT-WELD
FUNCTION ON
PULSATING TIG WELD
Pulsating TIG welding can be done in
two ways with
RAINBOW 200 HF
:
•
ON PULSE
Pulsating TIG weld with manually set
weld parameters;
•
EASY PULSE
Pulsating TIG weld with weld parame-
ters set in synergy.
NOTE:
Pulsation is automatically cut off
while the current is on INITIAL and
FINAL.
TIG PULSATING WELDING WITH
CYCLE FUNCTION ON
2 different levels of pulsating current (
I
1
and
I
2
) can be used for welding with this
function. Here also welding can be done
in the two ways
ON PULSE
and
EASY
PULSE
.
It is also necessary to set the 2nd level
PEAK CURRENT (
I
2p
) (apart from the
pulsating parameters
I
b
,
I
p
,
f
) with the
CYCLE
function on. The other 2nd level
pulsating parameters (BASIC CUR-
RENT
I
2b
and FREQUENCY
f
) are
obtained in synergy. FREQUENCY
remains constant while the 2nd level
BASIC CURRENT (
I
2b
) is in proportion to
the ratio between the 1st level currents.
ON PULSE AND EASY PULSE
METHODS
ON PULSE METHOD
FINAL weld CURRENT (5 ÷ 200 A)
ATTENTION:
only programmable with
4 STROKE
or
CYCLE
functions on
POST-GAS time (0,5 ÷ 25 sec)
5)
Keep pressing the
SET/PROG
key for
about 1 second to
leave the weld parame-
ter setting phase
6)
TIG weld as desired
NOTE:
The display will
visualize the current value
used for welding if the
GREEN LED
I
1
stays on
continuously during wel-
ding
1)
Start up the welder by turning the
main switch to position I
2)
Press the
"weld mode"
button and set to
SPOT-WELD
position
3)
Press the
SET/PROG
button until the corre-
sponding led starts
flashing
4)
Turn the knob to set to
desired SPOT-WELD
TIME (0,5 ÷ 5 sec)
5)
Now continue in the same way as
for normal TIG welding, setting the
various parameters as indicated in
the
TIG WELD
procedures
1)
Start up the welder by turning the
main switch to position
I
2)
Press the "pulsation"
button until the desired
function is working
3)
Set the following pulsa-
tion parameters by
pressing the
SET/
PROG
button repeat-
edly
PEAK CURRENT
I
p
(5 ÷ 200 A)
BASIC CURRENT
I
b
(5 ÷ 200 A)
PULSATION FREQUENCY
f
(0,5 ÷ 500
Hz)
NOTE:
setting the value of
a parameter (usually
I
p
)
while
EASY PULSE
is
working, will give the
values of the other para-
meters (
I
b
,
f
) in synergy
Keep pressing the
SET/
PROG
key for about 1 sec-
ond to leave the weld
parameter setting phase
4)
TIG
-weld as desired
NOTE:
The RED
I
p
and
GREEN
I
1
leds will stay on
continuously during the
weld process and the
display will visualize the
current value used for wel-
ding.
1)
Start up the welder by turning the
main switch to position
I
2)
Press the
"weld mode"
button and set on
CYCLE
3A)
Press the
"pulsation"
button until the
ON
PULSE
function is
working
4A)
Press the
SET/PROG
key until the GREEN
led
I
1
and the RED led
I
p
will start flashing;
adjust the 1
st
level
PEAK CURRENT
I
1p
(5
÷ 200 A); value by tur-
ning the special dial.
