12 years ago
I just got a spot welder which wants 208 VAC, and I have 240 VAC
instead. I checked for taps on the transformers to switch for 240 VAC,
and that appears to not be present.
But I am more worried about the electronics of the controller.
The power supply is on the logic board with a heat-sinked TO-3 regulator
chip, so I'm not sure how able it would be to accept overvoltage without
cooking. If the power supply were separate, I would pull it out and hook
up a switching power supply which could produce the 5 VDC anywhere from
90 VAC to 250 VAC -- but digging into the board to split off the power
at the right point is a bit of a trick.
So -- ideally I need a transformer capable of producing a
secondary voltage of 32 VAC (28 would be close enough) from 240 VAC
input with a 15A current capability on the secondary.
Or -- I guess -- an autotransformer which could handle the 15A
Or a big 15A 240 VAC Variac.
I figure that the shipping costs would be least on the
buck-boost transformer (less iron though probably almost as much
The spot welder will handle 16 Ga steel without going to the top
tap on the transformer.