: Usually requires the torch to be positive and the work clamp to be negative.
Many experienced welders try to “figure it out” without reading the manual. With the CEM Dual MIG 120, that is a mistake. This is a dual-voltage machine (110V and 220V capability in some models, though standard is often 230V single-phase), and incorrect voltage setup can lead to catastrophic failure. cem dual mig 120 manual
Recommendations for the best for your specific project Which part of the manual : Usually requires the torch to be positive
If you’ve just picked up a second-hand CEM Dual MIG 120, or you’re trying to get an old workshop workhorse back in action, you’ve likely run into the same problem as many other welders: the paperwork is missing. CEM (City Engineering Manufacture) machines are known for being robust, British-made welders, but they are older machines, and original printed manuals are becoming collector's items. This is a dual-voltage machine (110V and 220V
| Parameter | Value / Range | |--------------------------|----------------------------------------| | Power Input | 230V / 120V AC (depending on region) | | Rated Duty Cycle | 60% @ 80A, 20% @ 120A | | Welding Current Range | 30 – 120 Amps | | Wire Diameters Supported | 0.6 mm, 0.8 mm, 0.9 mm (flux-cored) | | Wire Feed Speed | 2 – 12 m/min (adjustable) | | Voltage Steps | 4 – 6 positions (rotary switch) | | Protection Class | IP21S | | Insulation Class | H |