REHM INVERTIG.PRO 240 DC Betriebsanleitung Seite 89

Functio o nal desc c ription
3.7 High-fr requency
The pu ush button [1 9] is used to
where the display LEDs [20] s
deactiv vated
3.7.1 Welding g with HF
The RE EHM TIG we elding units a
using the "Electr rode" setting
automa atically.
The HF F ignition un it enables, t
and alt ternating cur rrent welding
electro de and the work piece
welding g faults. In b both cases, a
deactiv vated again automatical
current t welding as s described
ignition n unit. This re educes the r
enables s alternating current weld
direct c current weldin ng (see Cha
s " ", the HF
When t the setting is
the arc , the electrod de is held ap
pressin ng the torch button, a hi
the arc c. The contac ct free ignitio
seam a are prevente d. When we
unit is d deactivated a again autom
3.7.2 Welding g without
When welding und der direct o
carried out (lift arc) ). The high-f
To igni te the arc, t he electrode
When the electrod de is lifted u
causing g wear to th he pointed e
working g on sensitiv ve electronic
to CNC C controlled m machines) w
of high- -frequency p pulses.
3.8 Pulsin g
With th he press butt ton [21] you
conven ntional pulsin ng and high-f
selecte ed pulse type e by lighting u
y (HF) ig gnition
o select the HF ignition o
show wheth er the high-f
ignition
are fitted with h HF ignition
g, the HF ignition fu
hanks to the e pre-ionisati
g, the contac ct free ignitio
e, which pre events tungs
after the succ cessful igniti
lly. The re-i ignition of t
in Chapter 3.5.14 is ca
radiation of e electrical inte
ding without HF ignition a
pter 3.7.2).
F ignition uni t is ready for
pproximately 3-5 mm abo
gh voltage i mpulse ionis
on means th hat tungsten
lding, after t he successfu
atically.
HF ignitio on
or alternating g current, a
frequency fun nction is dea
e is put in pl ace, and the
up, the arc ignites as p
electrode. Th his can be
objects (for example, in
when a dang er is posed
can select th he welding p
frequency pu lsing. The di
up (see Chap pter 3.5.7).
of the arc in TIG welding
-frequency is s activated o
n units as sta andard. Whe
unction is s deactivate
ion of the air r, when direc
on of the arc c between th
sten inclusio ons and thu
ion, the HF i ignition unit
the arc whe en alternatin
arried out wi ithout the H
erference fie elds and eve
as is already y familiar from
r operation. W When ignitin
ove the work k piece. Whe
ses the area a and create
inclusions i n the weldin
ful ignition, th he HF ignitio
contact ign nition can b
activated for this purpose
e torch butto on is pressed
programmed d and withou
a beneficial option whe
n hospitals, r repair weldin
by the interf ference caus
procedure wi thout pulsing
isplay LEDs [22] show th
g,
or
GB
en
ed
ct
he
us
is
ng
F
en
m
ng
en
es
ng
on
be
e.
d.
ut
en
ng
se
g,
he
2 25