MARC - MAGNETIC ROTATING ARC - Nut Welding with rotating arc

Functional welding sequence:

• The nut is placed onto the base material - the current circuit is closed
• Preflow of shielding gas
• Coil current is switched on and magnetic field is generated
• Power unit is switched on and arc voltage is provided
  
• Lift of nut/sleeve
• Ignition of pilot arc and then ignition of welding arc between nut and plate
• Burning of rotating arc along the ring-shaped welding area
• At the end of welding time, the nut is lowered and plunged into the liquid weld pool
• Electrical short-circuit and cut-off of welding current
  
• Formation and solidification of weld seam with post-flow time of shielding gas