What can lead to default in welding process?

What can lead to default in welding process?
1.The welding torch lies too high.
2.Welding torch doesn’t aligned left and right side.
3.High current leads to melt. 
4.There lack of argon,the welding fire will disperse.
5.There is water or oil on the roll sets and strips and it leads to the dispersion of the welding fire. You need to was the oil, thinner can help you.But keep in mind to ensure the safety as thinner is chemicals.      

6.More problems please contact with us through the following method.  
7.You need a high-quality welding machine,Seko Machinery's welding machine is recommended.

Website:www.gdseko.com 

Emali :sales6@gdseko.com 

Skype:lshelly520