REHM INVERTIG.PRO 240 DC Betriebsanleitung Seite 83

Functio o nal desc c ription
in diffic cult position ns and whe
materia als.
High-fr requency pu ulses: With
The pro ocedure of w welding curre
the tim e periods fo or which the
same. Since these e time perio
frequen ncy is sensib ble and norm
For the e conversion n to pulse fre
followin ng relationsh hips are valid
Overall l pulse time = I -pulse t
1
I pulse e time t = I
1 1 2
Examp le:
Pulse f frequency = 5 50 Hz
Overall l pulse time = = I -pulse tim
1
I -pulse e time t = 0 .5 * Overall p
1 1
I -pulse e time t = 0 .5 * Overall p
2 2
This m eans that th he current du
second ds (=10 ms) than it has t
and the en it goes ba ack to the val
Pulsing g with such s short times re
Due to o the very qu uick change
value. T Thus, with a welding curr
3.5.8 Weldin ng current
Setting of the weld ing current I
The us e of welding g current I
display yed when TI IG welding.
Chapte er 3.5.7) and for dual curr
Dual c urrent regul lation:
Genera al functional o operation:
The du al current re egulation ma
with 2 different pr re-set curren
values I and I . Th e switch is p
1 2
switche es:
 From
m high curr rent to low
weld ding position n.
 Man
nual pulsing (see Chapte
 Star
rting with hig gh current I1
lowe er current I .
2
 Star
rting with low w current I
curr rent I .
2
Switchi ing is possib le in 2-step a
The fol lowing range es can be se
n bridging large gaps)
h pulse freq uencies from
ent correspo nds to conve
currents I and I a
1 2
ods are very y small, an
al.
equency in the various
:
time t + I -pu ulse time t
1 2
pulse t time t
2
me t + I -puls se time t
1 2
pulse time = 0.01s
pulse time = 0.01s
uring welding g has the va
the value of current l
ue for curren nt l for 0.01
1
esults in a sli mmer arc an
es, the digita al display alw
rent l = 100A A and l2 = 50
1
t I
2
I [9] is carrie ed out as de
2
o nly makes s ense for TIG
2
Welding cu urrent I
rent regulatio on:
kes it possib ble for the us
nts. This allo ows you to
performed by y pressing to
or vice vers sa, for exam
er 3.5.10)
1 to warm th he work piec
a at work piece e edges, the
1
and 4-step o peration with
t in accordan nce with the
and when welding thi
m 10 Hz to 1 15 kHz
entional puls sing. Howeve
are ea ach active a re always th
identificatio on with puls
pulse times t and t
1
= = 1/ pu lse frequenc
2
= = 0.5 * Overall pulse
time
= 1 1/50 Hz = 20 0 ms = 0.02 s
2
alue of curre ent I1 for 0.0
fo or 0.01 secon nds (=10 ms
2
seconds (=1 0 ms) etc.
nd a deeper penetration.
ways shows s the averag
0 A, 75 A is d displayed.
escribed in C Chapter 3.5.1
G welding an d is thus on
is used when pulsing (se
2
ser to use a 2 2 button torc
switch betw ween the tw
rch button 2 . Examples o
mple, when changing th
ce, then we lding with th
en welding w with the highe
hout pulsing.
welding curr rent I :
1
in
er
he
se
GB
th he
2
cy
e
s
01
s),
ge
1.
ly
ee
ch
wo
of
he
he
er
1 9