Troubleshooting welding amperage

Setting the wrong amperage can cause weld defects and trouble starting the arc. If you’re not getting the results you want but aren’t sure if you’ve set the amperage too low or too high then look out for these indicators.

Different manufacturers can have slightly different amperage ranges, so make sure to check the packaging and follow their guidance. .

When the amperage is too low

• It’s harder to start the arc
• The arc is weak
• The welding rod sticks
• The weld puddle is too thin
• There is low deposition
• Travel speed is low
• There is low fusion
• The slag is darker than usual

When the amperage is too high

• The arc is violent
• The deposition is too high
• The travel speed is too fast
• The weld bead is too wide
• There’s warping or burn-through
• There’s a lot of spatter
• The welding rod may turn red
• The slag is redder than usual