POWER-MASTER 500 - Victor Technologies

430581-004 POWER-MASTER 500
A lift arc cir cuit is au to mat i cally ac ti vated for
GTAW mode, un less dis abled in ter nally by
jumper se lec tions on the con trol board (See in -
stal la tion chap ter for jumper set tings). The lift arc
cir cuit al lows the arc to be ini ti ated by mo men -
tarily touch ing the tung sten to the work and then
lift ing or rock ing the tung sten off the work. The lift
arc cir cuit lim its the “touch” cur rent to a low value
and then switches to the pre set cur rent af ter the
arc is struck.
SMAW mode: In this mode the power source op -
er ates in con stant cur rent mode. The front panel
con trol can be used to pre set the de sired weld ing
am per age. The arc force con trol is ac ti vated for
SMAW mode al low ing the amount of “dig” or arc
force to be set by the arc force con trol. Max i mum
arc force is full clock wise, full coun ter clock wise
is zero arc force.
GMAW mode: In this mode the power source op -
er ates in con stant volt age mode. The front panel
con trol can be used to pre set the de sired weld ing
volt age. The in duc tance con trol is ac ti vated for
GMAW mode. The in duc tance con trol al lows the
arc char ac ter is tics to be ad justed. Max i mum in -
duc tance is full clock wise. Higher in duc tance
set tings make the arc “softer” with less spat ter.
Lower in duc tance set tings give a stron ger “driv -
ing” arc. Gen erally the in duc tance con trol can be
set at mid range as a good start ing point.
The GMAW mode also has a built in
wire-sharpening cir cuit to help con di tion the end
of the wire at the end of the weld. This fea ture re -
duces the size of the ball on the end of the wire to
im prove the next arc start. The wire sharp set -
tings can be mod i fied or dis abled by us ing the
pro gram mer in ter face.
PULSED GMAW mode: In this mode the power
source uses the built in pulse con trol for pulsed
GMAW weld ing. The pulse con trol is fac tory pro -
grammed with 24 dif fer ent pulse weld sched ules.
The ac tive pulse sched ule is shown on the pulse
sched ule dis play. The la bel on the in side of the
con trol door shows the pulse sched ules as
shipped from the fac tory. Sched ules 1 - 12 are
pro grammed as stan dard (non AVC) and sched -
ules 13-24 are pro grammed as AVC sched ules.
The AVC sched ules pro vide for con trol of the arc
length as the torch to work dis tance is var ied. In
the pulsed GMAW mode the front panel out put
con trol is used to pre set a pulse ref er ence for the
pulse con trol cir cuit. The pulse sched ules can be
mod i fied by us ing the pro gram mer in ter face.
7. Arc Force/In duc tance Con trol: When the
SMAW mode is se lected this con trol is ac ti vated
3-8
and al lows ad just ment of the amount of arc force
or “dig”. Max i mum arc force is full clock wise, full
coun ter clock wise is zero arc force. For GMAW
mode this con trol can be used to ad just the
amount of “in duc tance” in the cir cuit. Higher in -
duc tance set tings make the arc “softer” with less
spat ter. Lower in duc tance set tings give a stron -
ger “driv ing” arc. Gen erally the in duc tance con -
trol can be set at mid range as a good start ing
point. For GTAW and PULSED-GMAW modes,
this con trol is not ac tive.
8. Contactor On In di ca tor: This in di ca tor light
is on when ever the out put of the power source is
en er gized, ei ther by the contactor switch on the
front panel or by the re mote gun switch sig nal.
9. Contactor Switch: This switch can be used
to en er gize the out put of the power source, when
a re mote gun switch is not be ing used. This
switch would pri mar ily be used for SMAW weld -
ing or GTAW weld ing with out a re mote pen dant
or foot pedal.
10. Pulse Sched ule Dis play: This two digit dis -
play shows the cur rent se lected pulse GMAW
weld ing sched ule. The cur rent sched ule can be
changed by us ing the sched ule up and down se -
lect but tons.
11. Pulse Sched ule Se lect But tons: These
two but tons can be used to se lect one of the built
in pulse GMAW weld ing sched ules. These but -
tons can only be used to change the pulse
sched ule when the out put contactor is off, see
de scrip tion 8 above.
12. Re mote On Se lec tor: This but ton al lows
the se lec tion of ei ther re mote con trol of the out -
put or lo cal (front panel) con trol of the out put.
The in di ca tor light next to the switch will be on if
re mote con trol is se lected, and off if lo cal con trol
is se lected. Re mote con trol is via ei ther the 19
pin or 14 pin re cep ta cle on the rear panel of the
power source.
13. Pro gram mer Port: This port al lows the con -
nec tion of the power source to a com puter for ac -
cess ing the pro gram ma ble fea tures of the power
source. This port is con fig ured for di rect con nec -
tion to a se rial port on a com puter.
14. Out put Neg a tive Ter mi nal: Con nec tion
point for neg a tive weld ing lead.