Gallery, Projects and General > The Design Shop
Microwave owen transformer spot welder?
BillTodd:
Just in case you haven't already seen this:
BTW his spotwelder is very powerful so his timings are in cycles (20mS - I guess)
PekkaNF:
Thanks, I saw it. His unit is pretty ideal to him, 15KVA I think, his reasoning being that on thin steel plate you can weld well with MIG after this machine gets small.
And NO, I'm not over complicating it. I'm trying understad enough of instead of over simplifying it. Just got 400 VAC welder, single phase all out 180A...This could be tranny donor to next spot welder....but this thing first - baby steps.
Pekka
PekkaNF:
Got yesterday 20 mm copper rod and big enough CU/AL connectors. They are pretty nice, all data is available down to screw torque.
I found out that grounding "copper" rods are steel rods, that are plated with copper....
Found out place that sells spot welder electrode rods by metre (or even pieces). They have 8,10 and 12 mm at the small end.
Postal service is on strike......
Pekka
Fergus OMore:
I've just found out that my earthing rod is also coated steel. Happily, I have found a possible source of small quantities of scrap copper to cut up. I'm now looking for insulation for the welder arms. I have, like the other Atkinson cousin , a cunning plan.
PekkaNF:
Ok. Got 1 metre of 10 mm spot welding electrode rod and 1,5 metres of 12 mm diameter. Those were smalles amount (cutoffs....) from the welding supply shop that deals with individuals here.
So I must build something. Work has kept me busy, but maybe in Christmas time I can squise some time off.
Next I need to build mechanics, I think I have all in the junk er.. materials pile. Probably will use circuit board for insulation.
But my mind is in timer/counter. I want something like 2-100 mains cycles. Or from 20 ms up to sec or two. Any suggestions to ready made timer/counter that would keep the count between power up/down cycle and has PNP/NPN output. Maybe with BCD switches.
Pekka
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