I’ve added a second wire current contact point to the lower guide of the C-arc. The operating current level can now be more than doubled, increasing the cutting speed by more than 200%. My are generator can run at very high power levels, so that is not the bottleneck in my machine for achieving higher cutting speeds.
Cutting 3mm Aluminum @ >20mm/min!
Cutting 6mm stainless steel @ >2mm/min
Cutting 10mm Aluminum @ 5mm/min
Here are some example videos:
The next video starts with a stutter when the wire first touches. This is the algorithm searching for the optimal cutting speed. Once found the wire blasts through the 3mm Al @ >20mm/min. Cutting at this power level generated a large amount of hydrogen gas!