Re: Gecko Vampire drive

Mariss,

Did I touch a nerve? I didn't attack you, just pointed out you have
fixed my problems I had with your drives via 3,4,5.. Inertia of the
heavy slide, voltage switching and heat monitoring.

Don't be offended. Gecko 201 drives, smaller then 1/3 size pack of
cigarettes ran a "Huge" nema 42 motor and drive on a real bridgeport
production machine. Your drives front end and power economy exceeded
the original equipment. I had some problems and that is all. If the
heat sinking problem had been fixed it would have never occurred.

AS I said before, Gecko makes some good drives, just not used in my
applications.

You did offer to replace or refund money. Outstanding business
practices too.

I do not have a problem with you or Gecko drives. Relax.

David Cofer





--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
<mariss92705@y...> wrote:

> Yeah, well what ever. I know you from the other group you hang out
> in. Enough said.
>
> Mariss
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "ibewgypsie"
> <ibewgypsie@h...> wrote:
> > Better heat sink clamping? Pretty good drive but I have "killed" a
> few
> > of the 201's. I do not own any at this time.
> >
> > David Cofer
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
> > <mariss92705@y...> wrote:
> > > Due to recent events, the "bullet-proof" G201 has been renamed
> G204V
> > > and moved up to the front burner on the development stove.
> Vampires
> > > are very hard to kill, the G204V will be very hard to kill,
> therefore
> > > the name change. It will be the same size and pinout as the G201
> but
> > > will incorporate the following improvements:
> > >
> > > 1) Radically different switching topology. The motor will be
> stone-
> > > cold while stopped or turning slowly. Overdrive ratios of 80:1
> will
> > > be possible. The switching topology synthesises the best of
> > > circulating and non-recirculating techniques within a single
> > > switching cycle.
> > >
> > > 2) Short Circuit protection. Miswire a motor, short the motor
> leads,
> > > have a bad (shorted) motor, it won't care. The Gecko Vampire
> will
> > > simply light the Fault output (previously the Enable terminal).
> You
> > > clear the problem, reset it, and it takes off again.
> > >
> > > 3) Load dump. You are decelerating a large motor carring a heavy
> > > inertial load rapidly from a high speed. Energy is being
> extracted to
> > > stop the load and must be dissipated. No problem, the on-board
> energy
> > > dump circuit will safely shunt it to ground.
> > >
> > > 4) Thermal shutdown. Forgot to use one or have undersized the
> > > heatsink? No problem. The Gecko Vampire will light the Fault LED
> when
> > > things get too hot and will go into protective shutdown. Once
> things
> > > cool off it'll be ready to try again.
> > >
> > > 5) Motor connect/disconnect protection. You have a crappy motor
> > > connector or you forget to shut the power off before
> > > connecting/disconnecting the motor? Again, no problem. If the
> Vampire
> > > drive doesn't like what you just did it will light the Fault LED
> and
> > > wait until you get your act together:-)
> > >
> > > 6) G201 or G210? Both will be incorporated in the Vampire.
> Microstep,
> > > half-step, full-step, your choice. The jumpers will be available
> > > without taking the cover off.
> > >
> > > 7) No Caps, no Zeners need apply. The Gecko Vampire uses a
> completly
> > > new power section circuit that balances the circulating currents
> with
> > > almost no current ripple at all. This means no external "helper"
> > > parts will be needed. Hook it up to your supply and it's ready to
> go.
> > >
> > > 8) You still managed to blow it up? People are creative and
> someone
> > > will be a Vampire Slayer. It will not stand up to someone
> applying
> > > 115VAC to it for instance. For those special lucky (or unlucky)
> few,
> > > all will not be completely lost. The G204V is a two-board design.
> > > With effort, you may be able to blow up the main power section.
> The
> > > second board will survive, making your loss considerably less
> than
> > > 100%.
> > >
> > > 9) When, how much? Basically don't ask right now. The when part
> will
> > > probably be between next spring and summer. The cost is the last
> > > thing that's figured after everything else is done and working.
> The
> > > price won't be that much more than a G210 though. Otherwise there
> is
> > > no point in doing it; it has to be affordable.
> > >
> > > 10) Protection. It will be necessary to protect it by copyrights,
> > > patents, circut techniques and other means. As I have sadly
> > > discovered, not everyone is honest. I am lucky that I have good
> > > ideas, but I don't have them often enough that I don't mourn when
> > > someone steals one.
> > >
> > > Looking at the whole thing quixotically, the system is really set
> up
> > > to produce the best for everyone. The stupid steal from the
> smart,
> > > the smart in turn come up with something better to shake off the
> > > stupid. In the ensuing process everyone benefits.
> > >
> > > Until this little matter happened to me, there was no reason to
> come
> > > up with a better drive even though I had designed a far better
> one.
> > > See what I mean?
> > >
> > > Mariss