502 AC/DC - 1 Stop Welding Shop

5 0 2 AC/ D C
Output Voltage Led
Remote Control Led
General AlarmLed
Encoder
MMA/ARC AIR
TIG DC-TIG DC/Pulse
Menu
Function Key
Job Management
Key
TIG DC/Pulse/Syn.
TIG AC-TIG AC/Pulse
Functions
Mix AC/DC
Extra Fusion
AC Freq.
Balance
Ø Tungsten
Q START
DYNAMIC ARC
2-Strokes Led
MULTI-TACK
4-Strokes Led
4-Strokes Bi-level Led
Quick Spot
5 0 2 AC/ D C
Technical Data
The Masterweld 502 AC/DC offers unrivaled TIG welding characteristics making it undoubtedly a class leader in the field.
The user-friendly digital front panel makes it easy for the welder to get the very best from the many advanced features in AC and
in DC programs.
– 50 programs can be loaded and saved in memory
– Remote controls are available: for torch (UP&DOWN, potentiometer), foot pedal or remote control unit
– Cooling unit is also available
Masterweld 502 AC/DC
3x400Vac ± 15% @50-60Hz
40A@
TIG - WIG
MMA
30%
60%
100%
30%
60%
100%
500A
380A
340A
500A
370A
340A
5A - 500A
10A - 500A
9/81V
25,5kVA– 23,4kW
23
690 x 290 x 450mm
56,5Kg
TECHNOLOGY
PROCESSES
TIG- WIG
MMA
ARC AIR
SPECIAL FUNCTIONS
0
+
+
-
-
2 ,5 KH z
SYN
MATERIALS
Aluminium
Mild steel
Stainless steel
Copper
Pipe welding
Heavy industry
INDUSTRIES
Industry
Shipyard
5 0 2 AC/ D C
Special Functions
Pre-set balanced parameters, stored in the Synergic Pulse TIG DC SYN curve, simplify
Pulsed welding by adjusting only welding current.
SYN
The pulse TIG with frequency until 2500Hz allows to weld very thin materials with easy arc
control and very low heat input on workpiece.
2 ,5 KH z
The Q-START (Quick Start) function facilitates the joining of
the
parts in the initial stage of the welding process. On activating
this function the machine automatically switches to Synergic
pulsed mode for a preset time. The resulting pulses create
movement of the molten metal on the two sheet metal edges
thereby accelerating formation of the join. This function is
invaluable in the case of seams with slight openings or with
irregular preparation. The duration of the series of pulses can
be adjusted, (from 0.1 to 60 second) depending on the
thickness
and shape of the sheet to be welded.
Q-START
90°
5 0 2 AC/ D C
The DYNAMIC ARC function makes it possible to keep the product of Voltage x Current constant.
The power source increases the welding current as the arc voltage decreases and reduces the
welding current if the arc voltage increases. The DynARC value can be adjusted from a minimum of
1Ampere to a maximum of 50 Ampere at each 1 Volt variation, whether positive or negative.
Welding benefits of the DynARC function:
Faster welding - Less plastic deformation of the welded part. Increased vertex angle penetration Heat input concentrated exclusively on the weld and not on the surrounding area - Less oxidation of
the part and hence reduced post-welding reworking costs - Improved control of the first root pass
(helpful for plumbers and plant engineers) - Reduced risk of the electrode sticking when it touches
the weld puddle - Facility to work with the electrode very close to the weld puddle in order to
concentrate the arc.
90°
Standard TIG welding
Dynamic Arc TIG welding
The Q-Spot (Quick Spot) function makes it possible to minimise tacking times for light
gauge sheet metal. The operator conveniently places the tungsten electrode on the fixing
point, thereby obtaining perfect control of the position of the join. Once the electrode has
been lifted the machine emits a very high intensity welding current pulse with a very short
preset time (from 0.01 Sec to 10 Sec). The pulse time varies depending on the type of
sheet metal to be joined. In this way the welded point closes instantly with minimum heat
transfer, leaving the metal white, clean and almost cold.
Pipe butt weld
Ø 31.75 x 2 mm
Corner spot
welding thickness
0,6 mm
90°
The MULTITACK systemmakes it possible to reduce heat output while joining two light
gauge parts. The series of arc strikes at short time intervals allows the material to cool
during the pause between one strike and the other and thus minimizes its deformation. The
facility to adjust the frequency of the series of arc strikes in the time unit makes it possible to
adapt the electric arc to the welding speed and the joint geometry.
5 0 2 AC/ D C
Special Functions
Thus function makes it possible to shift the waveformtowards the negative part with respect to zero.
This makes it possible to create a highly penetrative and precise fusion bath so that very light
gauge sheets can be welded with an electrode tip comparable to that of an electrode for DC- TIG
welding. The adjustable value in our AC/DC TIG power sources ranges from0%to 80%(with respect
to the DC - half-wave percentage). The Extra Fusion function is not recommended when welding
heavy gauges because the DC+ component is insufficient to ensure optimal cleaning (pickling) of
the part during the welding process.
0
Fillet welding of specific 0,8mm
thickness sheet
Particular on the fillet welding.
It is possible to notice
the remarkable degree of finishing
and the high welding precision
This function MIX AC/DC makes it possible to modulate the welding current, alternating a halfperiod of TIG AC with a half-period of TIG DC. This means that the efficacy of AC TIG welding
can be combined with the high penetration of DC TIG welding, thus obtaining high welding speed
and creating the weld puddle rapidly on a cold workpiece. It is also possible to weld heavier
gauges with lower amperage, since the DC- portion is far higher than when using an entirely AC
waveform. The operator adjustable parameter is the percentage of AC waveform compared to DCwaveform over the entire period, which can be varied from 10% to 80%.
0
+
+
-
-
Main benefits of MIX AC/DC:
- Welding of heavy gauge sheets with lower current than
necessary when using an exclusively ACsupply
- Very fast execution thanks to the high percentage of DCcurrent present in the period
- Very fast creation of the weld puddle (ideal for facing of
tools, dies and heavy gauge castings)
- Welding of extremely diverse thickness sheets (1 mm to10
mm).
It is good practice never to exceed the value of 50% DCwaveform, which would otherwise impair pickling of the
part and the appearance of the weld bead.
Effects of the different wave forms by TIG AC welding
TRIANGULAR WAVE
SINE WAVE
RECTANGULAR WAVE
It is characterized from a particularly soft
and concentrated arc.
This wave form is ideal for very precise
welding of thin Aluminum plates.
It is the standard wave form,
characterized by low noise and excellent
arc control.
This allows a deep penetration and higher
welding speed; the cleaning effect is
also increased. This specific wave,
compared with other rectangular waves
present in the market, results to emit
particular lownoise.
5 0 2 AC/ D C
Plus and Accessories
PLUS
STRUCTURAL
STRENGTH
ROBUST
WHEELS
The robust wheels of the Masterweld
The structural strength of the
502 AC/DC allows smooth
Masterweld 502 AC/DC is very
robust in any working environment. movement of the power source.
EASY
CARRIAGE
The Masterweld 502 AC/DC can be
easily moved around any
workplace thanks to our robust
trolley.
A CCESSO RI ES
FOOT PEDAL
SOFTWARE UPGRADE
OF THE WHOLE MACHINE
UP AND DOWN
TORCH
REMOTE CONTROL
Masterweld Equipment represents a
collection of unique technology in
Welding Machines and Welding Torches
that are strictly manufactured in the EU
to EN 60974-1, EN 60974-5 and EN
60974-10, representing the highest
quality and technological excellence.
In today’s harsh manufacturing
environment, productivity is
paramount, and investing in the right
Welding Plant is key to manufacturing
success.
Masterweld TIG Welding Machines,
MIG Welding Equipment, and Arc
Welding Inverters, over the years have
established a reputation for being
extremely reliable, easy to use
interface, and unbeatable arc
characteristic for the most demanding
welding environments.
Masterweld - The Welders' Ultimate
Choice
D ealer