* Initial tests with welding argon showed that it worked and was sputtering metal, however maintaining a plasma seemed to use a lot of current. The former operator suggested pulsing it to burn any oxygen in the chamber out. The manufacturer suggested a short that could be remedied by a good cleaning, which was performed. | * Initial tests with welding argon showed that it worked and was sputtering metal, however maintaining a plasma seemed to use a lot of current. The former operator suggested pulsing it to burn any oxygen in the chamber out. The manufacturer suggested a short that could be remedied by a good cleaning, which was performed. |