Re: [CAD_CAM_EDM_DRO] Re: gecko's and voltage

On Sun, 2003-07-06 at 09:40, mmurray701 wrote:

> > This situation is NOT a matter of petitioning, but
> > rather a matter of considering the end user requirement. Yes,
> using a
> > larger voltage transistor may increase the price of the driver by
> $10 or
> > $40, but it will decrease the transformer cost by $100-$200.
> Every try
> > to buy a 1.8KV oddball voltage transformer ?
>
> Well, instead of using a huge oddball oddball transformer,

Stepdown transformers are not oddball. Hammond for one makes them. Go
to any electrical wholesaler and they can get you one. Nothing oddball
about that, right ?

> why not
> use a bunch of smaller more common ones? MPJA has 24v 10a
> transformers for $17.99. Two of these in series will give 48v AC and
> roughly 67V DC when rectified.

1.8KVA / 240VA = 8 transformers, not, not 6. I'd have to double the
size of my CNC electrical box.

> This is what I plan to use for my
> Gecko servo system. Did I miss anything? Should work fine right? If
> you need more than 10a (sounds like you do) just add additionaly
> sets of whats described above. If you were to go with 3 sets of 2 (6
> total) that would give you a 67v 30a supply (2.0KW) and all 6
> transformers would still only cost $107. Dont seem too expensive to
> me.

That is an ugly solution. When was the last time you went into a
commercial piece of equipment and found 6 transformers ?

> > We ? Does that mean you work for Gecko ? If I guarantee my
> supply will
> > never exceed 100V ie use a zener protection circuit set at 90V,
> can I
> > use a G320 at 87V ?
>
> Mariss is the designer of the Geckodrives. Any advice received from
> him should be strongly considered. He really knows his stuff. Good
> luck.
>
> Mark
>
>
>
>
>
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--
Kim Lux <lux@...>