★
High performance MCU, Digital control, Digital display
★
Preset all parameters with hold process
★
HF/Lift TIG, current down slope and up slope, gas post-flow, Pulse Frequency
★
Intelligent protection: over-voltage, under-voltage, over-current, over-heat
1. For MMA, polarity connection can be chosen according to different electrodes
，
please
refer to §3.3.1
；
2. For DC TIG, DCEP is used normally (workpiece connected to positive polarity, while
torch connected to negative polarity). This connection has many characters, such as stable
welding arc, low tungsten pole loss, more welding current, narrow and deep weld;
3. DC Pulsed TIG has the following characters: 1) Pulse heating. Metal in Molten pool has
short time on high temperature status and freezes quickly, which can reduce the possibility to
produce hot crack of the materials with thermal sensitivity. 2) The workpiece gets little heat. Arc
energy is focused. Be suitable for thin sheet and super thin sheet welding. 3) Exactly control heat
input and the size of the molten pool. The depth of penetration is even. Be suitable for welding by
one side and forming by two sides and all position welding for pipe. 4) High frequency arc can
make metal for microlite fabric, eliminate blowhole and improve the mechanical performance of
the joint. 5) High frequency arc is suitable for high welding speed to improve the productivity.
TIG series of welding machines is suitable for all positions welding for various plates made
of stainless steel, carbon steel, alloyed steel, titanium, magnesium, cuprum, etc, which is also
applied to pipe installment, mould mend, petrochemical, architecture decoration, car repair,
bicycle, handicraft and common manufacture.
MMA
——Manual Metal Arc welding;
PWM
——Pulse-Width Modulation;
IGBT
——Insulation Gate Bipolar Transistor;
TIG
——Tungsten Inert Gas welding.
2.4 Duty cycle and Over-heat
The letter “X” stands for Duty Cycle, which is defined as the portion of the time a welding
machine can weld continuously with it’s rated output current within a certain time cycle (10
minutes).
9
www.strata.co.nz
EZITIG 205DC
