Re: Thanks Mariss/Where are you!

Paul,

Of course an isolation transformer would be safer. However human
nature is such that some would consider it a needless expense; I know
I would were I in that situation.

Most of the ones that would dispense with it would know the
difference between the black, white and green wires but some would
not.

The only way to have some control over the consequences would require
the power supply, cableing, encoder and motor be integrated with the
drive. Maybe I will do that sometime in the future.

I have a 160VDC prototype of the G320 that I occasionally run for my
own amusement and it works very well indeed. However our lawyers
warned us off from putting it in production for the previously
mentioned reasons. We pay them the big bucks to see problems I cannot
and they earned their money on that one.

It disgusts me because it works so well (no xformer).

Mariss

--- In CAD_CAM_EDM_DRO@y..., "sprooney797" <prooney797@a...> wrote:
>
>
> Mariss Wrote:
> > (3) Sure as God made little green apples someone will run it off
of
> > rectified 115VAC, kill himself and more lawyers will become rich
at
> > my expense.
>
> Mariss, running from a rectified 115vac source sounds very
appealing,
> and I must admit that is why I would like a drive that is rated to
> handle the higher voltage.
>
> If the circuit is properly grounded and fused, where is the danger
in
> doing this? I believe many of the industrial servo drives work off
of
> a rectified AC source.
>
> Would the use of an isolation transformer make it any safer?
>
> Or is the risk because of the use of home-made cables and cobbled up
> control boxes?
>
> Just curious as I'd love to do away with the large DC power
supplies.
>
> Sincerely,
>
> Paul Rooney
>
>
>
>
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> > Eric,
> >
> > Couple of problems with a 160VDC rating:
> >
> > (1) The drive becomes larger and more expensive.
> > (2) The market for that class drive is much smaller.
> > (3) Sure as God made little green apples someone will run it off
of
> > rectified 115VAC, kill himself and more lawyers will become rich
at
> > my expense.
> >
> > The ethernet cores are interesting but they are a little more
> > expensive and I don't know what the CPU overhead will be to use
> > ethernet. I am writing the stuff in assembly because every
> > microsecond counts.
> >
> > I've got the point-to-point, linear interpolation and circular
> > interpolation algorithms worked out. The point-to-point one is
> > written up and running already, so I am just about 1% finished
with
> > the project.
> >
> > Mariss
> >
> > --- In CAD_CAM_EDM_DRO@y..., "unterhausen" <unterhausen@y...>
wrote:
> > >
> > > Mariss,
> > > Just don't buy any of the rcm2300 ethernet rabbitcores, ok?
Darn
> > > things are really hard to get right now. I keep wondering why
the
> > > voltage on your drives are so low. I would own some 320's
right
> > now
> > > if the voltage went to 150 or so. Are you thinking about going
> > > higher with the brushless amps?
> > > Eric