|
|
Posted by Chriscase on Sunday, August 16, 2009 at 13:16:55 :
The 100K pot that controls the dimness was NFG- it read from 5U to 85k ohms. A real pot should read from leas than one ohm, to the nominal 100K. So I soldered in a Radio Shack 100K. Now when the pointer is on the '9', I can see just like the Amurican #9 fixed tint hood. And it goes to totally black- at 13 I can't even tell that the little mig is even making an arc.
Now I'm a pot head. ;)
That's the second one I've replaced this week. First one was in the Lincoln Mig 140. The wire speed pot was erratic, and just too fine. So Radio Shack to the rescue with a real pot, 5k, which I welded a 4.7K resistor across, making it in effect a 2.5K, so it now has a much coarser adjustment. It takes more than a stiff breeze to make the speed go out of usable range. Much easier to fry that bacon just crispy.
Both pieces came with crappy components.
Now I can go weld a couple miles of 16-18 gauge on my FWFFPW projecathon.