Arc welding machine Proline 42940, single-unit, inverter/stick welding (model 42940)

Proline 42940 is a compact arc welding machine designed for manual stick (MMA) welding. Supplied as a single unit, this inverter-based welder is intended for general metal fabrication, maintenance and repair work where portability and basic MMA functionality are required. The unit supports standard electrode diameters and includes essential cabling and clamps to start work immediately.

Advantages

The inverter topology and IGBT technology provide stable arc performance and improved energy efficiency compared with conventional transformers. Built-in functions such as Hot Start, Anti Stick and Arc Force facilitate strike and re-strike of the electrode while reducing sticking and burn-through. A compact 4.0 kg housing with fan cooling and thermal protection offers portability and reliable thermal management for intermittent professional and DIY tasks.

Suitable for

• General metal fabrication and workshop welding tasks
• Maintenance and repair on machinery, farm equipment and structural steel
• On-site and mobile welding where a lightweight, single-unit inverter is needed
• Welding with rutile and basic MMA electrodes within the recommended diameter range

Key specifications

• Welding technology: inverter with IGBT components
• Supported functions: Hot Start, Anti Stick, Arc Force
• Recommended electrode diameter: 1.6–4.0 mm
• Work cycle (duty cycle): 30% / 60% depending on current and conditions
• Unloaded nominal voltage: –70 V
• Efficiency: 85%
• Cooling: fan-cooled with thermal protection
• Insulation class: H; Protection class: IP21S
• Included cables and clamps: 1.8 m electrode cable with 200 A holder, 1.2 m ground cable with 200 A clamp
• Weight: 4.0 kg

How to use

Connect the ground clamp securely to a clean, conductive surface on the workpiece or fixture and attach the electrode holder with an appropriate MMA electrode (1.6–4.0 mm). Set welding current based on electrode type and material thickness following electrode manufacturer's recommendations. Use the Hot Start, Anti Stick and Arc Force features as needed to improve arc stability and restart after sticking. Ensure adequate ventilation and keep the fan intake clear of obstructions. Allow the unit to cool according to duty cycle limits to avoid thermal shutdown.

Usage recommendations

Use appropriate personal protective equipment including welding helmet, gloves and protective clothing. Select electrode coating and diameter appropriate for base metal and joint type. Maintain clean cable connections and inspect leads regularly for wear. Operate within the stated duty cycle and ambient temperature limits to prolong service life.