Well, I'm after one. I've just bought from He-buy a portable spot welder manufactured 25 years ago by Portable Welders Oxford. It says it's a Mk III B, and the gun end says it's an S20. It says it takes 20 amps at 240 volts single phase. The transformer is in the gun, but there's an intermediate box of tricks with an on/off switch, a range switch and a dial.
The company still exists, sort of, but say they bought out the original company, and, to paraphrase, couldn't be bothered to take over their technical documentation. Meaning, they don't have, or won't give me, a manual.
So, I've fixed all the frayed wires, fired her up, and she welds like a dream. But I'd really like to know three things.
Firstly, the power setting. Two ranges, 3 to 10 and 10 to 50, with the dial marked appropriately. I thought at first it meant timing, but now I think it's current. Any ideas ? I don't expect it to be a precision setting, but if it's just a general power setting I'd like to know.
Secondly, I'd very much like to get hold of a full technical schematic, just for the day when...
Thirdly, the electrodes are long and straight with short inserts. Now these inserts are bent away from the gun so that when they contact they make an angle of ninety degrees with each other. Would this have been by design, or some idiot bending things ?
Does anyone have one of these machines, or any suggestions for where I might try for a manual ? Googling is hard when one of the words you want to use has so many other meanings, like manual, documentation or mechanism
The company still exists, sort of, but say they bought out the original company, and, to paraphrase, couldn't be bothered to take over their technical documentation. Meaning, they don't have, or won't give me, a manual.
So, I've fixed all the frayed wires, fired her up, and she welds like a dream. But I'd really like to know three things.
Firstly, the power setting. Two ranges, 3 to 10 and 10 to 50, with the dial marked appropriately. I thought at first it meant timing, but now I think it's current. Any ideas ? I don't expect it to be a precision setting, but if it's just a general power setting I'd like to know.
Secondly, I'd very much like to get hold of a full technical schematic, just for the day when...
Thirdly, the electrodes are long and straight with short inserts. Now these inserts are bent away from the gun so that when they contact they make an angle of ninety degrees with each other. Would this have been by design, or some idiot bending things ?
Does anyone have one of these machines, or any suggestions for where I might try for a manual ? Googling is hard when one of the words you want to use has so many other meanings, like manual, documentation or mechanism
