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| Control | Function | Typical Setting | |---------|----------|------------------| | | Coarse heat setting | 1 (min) to 6 (max) | | Wire Speed | Adjusts amperage & deposition | 3–6 for 1-2mm steel | | Inductance (if present) | Controls puddle fluidity / spatter | Mid setting to start | | 2T / 4T trigger | 2T = press to weld; 4T = press once, lock on | 2T for most work | | Spot / Stitch (optional) | Timer for intermittent weld | Leave OFF unless doing bodywork |
: A consistent complaint from owners is that the welding wire remains live (has voltage) at all times, even when the trigger is not pulled. While this is a safety concern, many have noted that this is actually a design feature of these older, simpler machines, not a malfunction. The trigger typically controls only the wire feed motor. If this is a concern, ensure the machine is powered off when changing tips or setting down the torch. cem dual mig 140t
The (originally manufactured by the Italian brand CEMONT) is a legacy, hobby-to-intermediate level MIG welding machine. It is widely recognized in European DIY and small-shop circles but has become a relatively rare vintage item today.
The wire feeding motor is driven via a dedicated Pulse Width Modulation (PWM) configuration. A TO-3 power transistor (typically a 2N3055) is paired with a heavy-duty aluminum heatsink to handle continuous motor load without thermal failure. This circuit harvests its DC operational energy straight from the main welding transformer, which translates to automatic motor-speed stabilization whenever the welding arc experiences minor fluctuations. Performance Strengths Word spread
: Replacing the original torch with a standard Tweco-style quick-disconnect torch is a common improvement. This allows for easy replacement and access to affordable consumables (tips, nozzles) found at any welding supply store.
If you need the official PDF scan for a parts breakdown: The trigger typically controls only the wire feed motor
The trade-off is build quality consistency and customer support. Some units will last a decade; others might have a faulty board after six months. If you are willing to act as your own warranty service (or buy through Amazon/Ebay with a protection plan), this welder is a game-changer.
The CEM Dual MIG 140T offers several advantages that make it a popular choice among welders. Some of the benefits include: