WELDTECH EZITIG 200AC/DC, Operating Instructions Manual

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8
Parameter Select/ Adjust Knob (33)
Switch between welding parameter settings by
pressing this knob, adjust by turning the knob. Value
of the parameter selected will be shown on the LCD
display (28).
Quick Start Guide
Electrical Connection
The EZITIG 200AC/DC is designed to operate on
a 15A 230V AC power supply. If an extension cord
must be used, it should be a heavy duty version with
a minimum cable core size of 2.5mm2. It is recom-
mended to use the Euroquip industrial duty 15A ex-
tension lead, part number; 16895.
Operating Environment
Adequate ventilation is required to provide proper
cooling for the EZITIG 200 AC/DC. Ensure that the
machine is placed on a stable level surface where
clean cool air can easily flow through the unit. The
EZITIG200 AC/DC has electrical components and
control circuit boards which may be damaged by
excessive dust and dirt, so a clean operating environ-
ment is important for reliable product life.
Basic Operation - MIG Welding
1. ARC/MMA Welding Operation
1.1 Connect the earth cable quick connector to the
negative welding power output socket (3) Con-
nect the earth clamp to the work piece. Contact
with the work piece must be firm contact with
clean, bare metal, with no corrosion, paint or scale
at the contact point.
1.2 Insert an electrode into the electrode holder and
connect the electrode holder and work lead to the
positive welding power output socket (1).
NOTE: This polarity connection configuration is valid for
most GP (General Purpose) MMA electrodes. There are vari-
ances to this. If in doubt, check the electrode specifications
or consult the electrode manufacturer.
1.3 Connect the machine to suitable mains power us-
ing the mains input power lead. Switch the mains
Pulse Welding
Pulse welding mode switches the welding output
between a high and low current output in a cyclical
manner. When used correctly this function has sub-
stantial benefits in the TIG welding process including
greater weld penetration for less work heat input and
greater control of the weld pool.
The basic theory for setting the base current using
pulse mode is that the base current should be suf-
ficient to maintain the existing molten weld pool,
while the peak current is sufficient to melt new metal
in order to move/ expand the molten weld pool. In-
creased pulse frequency will have the effect of mak-
ing the arc more tightly focused which is useful for
fine stainless work and similar.
Pulsing can also be used to help move the weld pool,
this technique is useful for welding out of position or
with materials that have higher viscosity weld pool.
Higher pulse duty setting will give greater heat input,
while lower pulse duty will have the opposite effect.
Remote Current Control
The EZITIG 200 AC/DC can accept remote current
control from a potentiometer/ analogue signal or
a digital up/down button signal. Potentiometer re-
mote control will change the current from the 5A
minimum to the maximum set using the machine
current control (30). Using an up/ down button re-
mote signal, the current may be increased or de-
creased in 1A increments, or ‘scrolls’ up to 30A at a
time if the button is held down. This is very useful
for precision work. Refer to the accessories section
further on in this manual for the options available.
Duty Cycle Rating
Welding duty cycle is the percentage of actual weld-
ing time that can occur in a ten minute cycle. E.g.
20% at 160 amps - this means the welder can weld at
160 amps for 2 minutes and then the unit will need
Tips & Tricks
to be rested for 8 minutes. All duty cycle ratings are
based on an ambient air temperature of 40°C with
50% humidity, which is the international standard
for such a rating. In an environment with tempera-
tures exceeding 40°C, the duty cycle will be less than
stated. In ambient temperature less than 40°C, duty
cycle performance will be higher.