Re: [CAD_CAM_EDM_DRO] Re: moving Bridgeport steppers with Gecko d rivers - help!

Those 470Uf low esr caps are very important. I had a gecko without the case
on and under test one day. I noticed one of the components was getting
pretty warm when it shouldn't have. I added the 470uf low esr cap right at
terminals 1 and 2 and it cooled it right down to ambient temperature. There
was no fuse in circuit and the wire was only 14" long as I recall.

Dan

----- Original Message -----
From: "theokspindoctor" <mail@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, August 15, 2004 8:20 PM
Subject: [CAD_CAM_EDM_DRO] Re: moving Bridgeport steppers with Gecko d
rivers - help!


> Thanks, I will get some caps tomorrow and see if it helps...
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Andy Wander <awander@v...>
> wrote:
> > So why not install the caps, as recommended? One less potential
> problem.
> >
> > Andy
> >
> > -----Original Message-----
> > From: theokspindoctor
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Sent: 8/15/2004 10:28 PM
> > Subject: [CAD_CAM_EDM_DRO] Re: moving Bridgeport steppers with
> Gecko drivers
> > - help!
> >
> >
> > However, there is still the question of whether the 470 uF
> capacitor
> > is necessary across the power connection. Mariss writes that this
> > is required when the power supply is more than a 18 inches away or
> > uses a fuse, both of which are true for my setup. I assume that
> is
> > the length of the wire from the power supply to the Gecko drive.
> He
> > says this is necessary because the drive draws supply current in
> > 20khz pulses and needs "flywheel" for proper function.
> >
> >
> >
> > thanks!
> >
> > Keith Clark
>
>
>
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