Cem Dual Mig 120 Manual Upd Link
Once the setup is complete, follow these steps to start welding: Switch the machine on from the back panel.
Open the side cabinet. Place the wire spool on the hub. Adjust the tension nut so that the spool spins freely but does not freewheel when you stop feeding.
Unplug the welder and use low-pressure compressed air to blow accumulated metal dust out of the internal transformer cabinets.
This potentiometer controls how fast the motor pushes the wire. This must be tuned by ear—you’re looking for a consistent "sizzling bacon" sound. cem dual mig 120 manual
Guide the wire through the rear inlet guide tube, over the roller groove, and into the brass liner tube leading into the torch lead.
Understanding the electrical limitations and capabilities of your machine prevents damage and ensures high-quality welds. 230V AC (Single Phase, 50/60 Hz) Amperage Range: 30A to 120A Duty Cycle: 10% at 120A, 60% at 45A
Wear an auto-darkening welding helmet with a minimum shade rating of DIN 10 to protect against ultraviolet (UV) and infrared (IR) rays. Once the setup is complete, follow these steps
Set the voltage and wire feed speed on the front panel.
Finding a manual for vintage welding equipment like the can feel like a scavenger hunt. Because CEM (Costruzioni Elettromeccaniche Milanesi) machines were often rebranded or sold through specific regional distributors, documentation isn't always sitting on a shiny manufacturer website.
The first 10 pages of the are safety warnings. Do not skip them. Adjust the tension nut so that the spool
Supports gas shielding (Argon/CO2 mix) or gasless welding (flux-cored). Core Operation Guide
Because older machines like the CEM Dual MIG 120 do not have modern auto-set features, manual adjustments are required based on metal thickness: Material Thickness Voltage Switch Setting Wire Speed Range (1-10) Wire Type Required Gas Required 0.6mm Solid Argon/CO2 Mix 1.5mm – 2.0mm (Auto Body) 0.6mm / 0.8mm Solid Argon/CO2 Mix 2.5mm – 3.0mm (Light Frame) 0.8mm Flux-Cored / Solid None (FC) or Gas 4.0mm+ (Structural) 0.9mm Flux-Cored