Munkul
Jack of some trades, Master of none
- Messages
- 7,365
- Location
- Cumbria
It's not a problem, it's just a bit strange. I've noticed it a few times now.
Low speed pulse TIG welding with an average current of around 100 amps or less, with frames clamped securely to this jig. After a few hours, the brass clamp is hot to the touch. The strangest thing, is that the side without the cable (side facing the camera) is hottest... and the jaws themselves aren't all that hot... it's almost like something is induction heating it up, rather than a bad connection...
The earth clamp itself is in good nick (the green splodges are from some condensate a long while back), the cable connection is good and secure, the jaws are clean, and it's got a good bite into the steel.
It's not the machine, because it can happily idle there all day long and not heat up - it's after prolonged welding that it starts to heat.
What do we think? I didn't think there was enough going on around the clamp to cause eddy currents...
Low speed pulse TIG welding with an average current of around 100 amps or less, with frames clamped securely to this jig. After a few hours, the brass clamp is hot to the touch. The strangest thing, is that the side without the cable (side facing the camera) is hottest... and the jaws themselves aren't all that hot... it's almost like something is induction heating it up, rather than a bad connection...
The earth clamp itself is in good nick (the green splodges are from some condensate a long while back), the cable connection is good and secure, the jaws are clean, and it's got a good bite into the steel.
It's not the machine, because it can happily idle there all day long and not heat up - it's after prolonged welding that it starts to heat.
What do we think? I didn't think there was enough going on around the clamp to cause eddy currents...