EziArc140i User Guide

Work Lead:

Ensure that all connections are firmly fitted to the cable.

The work lead should be connected to the positive (+) terminal for most Stick applications*.

Earth Clamp & Lead:

Ensure that the clamp is very firmly fitted to the earth cable.

The earth lead should be connected to the negative (-) terminal for most Stick applications*.

*Refer to electrode manufacturers specifications / recommendations for correct / best polarity. Many electrodes will operate on either polarity.

Welding Modes

Press the Amp control knob to switch between Stick and TIG. The Machine will remember your last settings when switching modes.

The EziArc140i is designed to operate on a 10A 230V AC power supply.

If an extension cord must be used, it should be minimum cable core size 2.0mm2 for length of up to 10m, or minimum 2.5mm2 for length up to 20m. Using extension leads of over 20m is not recommended.

This machine has a wide input power variation tolerance (~170-265V), allowing it to operate off generator power. Ideal generator capacity is 7kVA. A suitable quality generator should have a THD (total harmonic distortion) rating of less than 6%. Most reputable generator suppliers will be able to specify the THD ratings on their product. 

In TIG mode, the EziArc140i is suitable for "Lift-Arc" DC TIG welding (10-130A) of mild-steel, stainless-steel, copper, and chrome-molly up to a thickness of approximately 3mm.

A TIG welding torch and gas regulator are required to set up the EziArc140i for TIG welding.

Note that the EziArc140i is NOT suitable for TIG welding of aluminum, as this requires machines with an AC/DC TIG function—such as the Strata EziTig205ACDC.

When enabled, VRD function reduces the open-circuit voltage (OCV / U₀) from 73V to a safer level of 11.7V.  The machine senses when the operator is striking an arc (resistance between electrode and work piece is less than 200 Ohmns) and switches VRD off to provide full voltage / welding power.  When welding stops, VRD will activate again.  Whenever VRD is activated, the VRD LED light on the control panel will be illuminated. 

VRD is mandatory for some work sites (especially mine sites). Whilst VRD reduces the risk of electrical hazard, striking the arc can be more challenging, especially with specialist or hard-to-run electrodes. 

Safety Guidelines for Machine Operation

• Mode Switching: Never switch the machine's function modes while it is operating. Doing so can cause damage that is not covered under warranty.
• Electrode Handling: Always disconnect the electrode-holder cable before turning on the machine to prevent arcing if the electrode contacts the workpiece.
• Operator Qualifications: Ensure operators are properly trained and qualified.

Electric Shock Risks

• Live Electrical Parts: Contact with live electrical parts can lead to fatal shocks or severe burns. The electrode and work circuit remain live when the machine is on. In MIG/MAG welding, all metal parts touching the wire are also live. Ensure proper grounding and installation of all equipment.
• Installation Standards: Adhere to Australian and New Zealand standards when connecting the primary input cable.
• Precautions: Avoid contact with live electrical components. Wear dry gloves and keep the workpiece insulated from your body. Maintain cords and replace any that show wear or damage immediately.
• Safety Recommendations: Use a Residual Current Device (RCD) to detect any leakage of current.
• Weather: Must NOT weld or use the machine in water, rain, or snow.
• EMC Filter: EMC circuitry has been fitted to this device in accordance with IEC 60974-10.

Fumes and Gases

• Health Risks: Fumes and gases from welding/cutting are hazardous. Avoid inhaling these and ensure good ventilation or wear an approved respirator in confined spaces.
• Safe Environment: Do not perform welding/cutting near operations that can create flammable vapors. Use appropriate ventilation and air-purifying respirators when working with materials that emit toxic fumes.

Arc Rays

• Protection from Rays: Arc rays can severely damage eyes and skin. Always use a welding helmet with the correct lens shade and wear protective clothing.

Fire Hazards

• Prevention: Avoid welding/cutting on closed containers to prevent explosions. Keep the area free of flammable materials and use covers for unavoidable flammable items nearby.
• Awareness: Be conscious of where welding sparks may land and keep a fire extinguisher ready.

Handling Gas Cylinders

• Storage and Handling: Keep gas cylinders secure and upright. Protect them from heat, shocks, and sparks. Never weld on pressurized cylinders.
• Safety Practices: Open cylinder valves slowly and avoid direct exposure to the escaping gas.

Other Hazards

• Magnetic Fields: Keep a distance from electromagnetic fields if you have an implanted medical device.
• Noise Exposure: Protect your hearing from high noise levels with approved ear protection.
• Hot Surfaces: Handle hot equipment with insulated gloves and allow for cooling periods after use.
• Machine Falling: Ensure the machine is secured firmly to prevent falling when placed on an unstable surface.