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| Real Bull mini-lathe circuit board diagrams. |
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| hopefuldave:
Thanks very much, gents! The SCR and diode spec's make sense, partiularly the "isolated tab" parts - can't bear to think of what'd happen with the heatsink/bracket shorting the two SCR's.... The mill power feed's a ready-built unit sold for one of the Chinese small mills (OK, it's actually three of 'em rescued from a skip...) - it has a 90V DC motor in it, and a tendency for the control board to burst into flames... Fortunately I have a known-good board to work from! I have to admit I'm a bit worried by the 90V motor being fed from the 240V mains, strikes me that could be why the controllers aren't too reliable... Dave H. (the other one) |
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