All,
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 load.
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 copper).
The spot welder will handle 16 Ga steel without going to the top tap on the transformer.
Thanks, DoN.