Just made a call to my local welding supplies store, i explained what the machine is doing and i was told it would be the earth lead so i took a look and under the lug its all rusted, bolt, washers, lug is very dirty I'm going to clean it up and see how i go
the guy at the shop said its a very old machine he said i can drop it in and have them check it and give me a quote on the repair bill, i am in it $350 not sure i want to spend much more on it