Adjust drive rolls pressure

Replace drive rolls and guides

Check drive rolls align properly

Replace the drive motor

Support on solid surface with two hands

Check gas flow rate and leakage of gas

Use clean and dry weld wire

Weld small segments and allow cooling

Closing

Opening

Shutting

Cracking

Blow hole

Under cut

Wire struck

Weld overlap

Porosity in weldment

Arc blow in weldment

Less spatter deposit in nozzle

More spatter deposit in nozzle