Re: Larken Cobra Stepper Drives

Thanks David. That's exactly the info I was looking for. I agree
the Geckos are fine products, with great support, but I felt it
wasn't necessary for me to buy a trio of them and overload them just
to prove I could kill 'em, when I already know the motor amperage
exceeds their rated capacity.

Thanks again,
Cliff

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ibewgypsie"
<ibewgypsie@h...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Ron K <godsone@e...>

wrote:

> > snip
> >
> > >
> > >Mine have been operating my bridgeport for nearly a year. No
> problems.
> > >I replaced gecko drives.
> > >
> > >
> > >
> > Why did you replace the Geckos ??
>
> THEY DIED. Mounted on the 24"x36" door heat sink. The heavy slide
> and the rapid decelleration of the 200lb plus slide built voltage,
> the Mosfets had a avalanche problem/slow turnoff. The geckos

depend

> on the Anodized layer for insulation also. All were non-

repairable.

> Larken drives have conventional IC's in sockets, heavy heat sink.
> The geckos are great drives for lighter applications. I have now

saw

> several with pentium heatsinks and fans on the backs that work

just

> fine.
> Larkens are going strong, over a year now. Made a lot of parts.
> David
> >
> > --
> > Ron Kline
> >
> > American Precision Ceramics
> >
> >
> >
> > [Non-text portions of this message have been removed]