Re: Gecko burned out

Hello,

Don't use the ferrules. The metal blade already in the connector
performs the function they might have. AND, since it IS already
there, it ALSO reduces the reliability of ferrules that you might try
to use WITH it in place. (means if you insist on using ferrules, pull
the metal blade out. )

Better to just use the thing the way it is designed to be used...<G>

Hope this helps,

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>
wrote:

>
> Ok, I will go to 18 gauge. If the wire fits it will make my life a
> lot simpler. I will try to find the ferrules as well. Must make a
> solid and reliable connection....
>
> Keith Clark
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "washcomp" <jeff@w...>

wrote:

> >
> > Whoa, slow down! If I remember right the Gecko is rated a 8 Amps
> > max. Because of this the connectors are sized accordingly. The
> fact
> > that a PS can put out higher amperage doesn't mean the the drive
> will
> > pull over 8 Amps. Therefore the wire doesn't have to be any
> larger
> > than #18. If you start trying to put two pounds into a one pound
> > package, you're looking for a headache. Change to #18 and your
> life
> > will be easier. Clipping strands off the #16 will still leave
> rough,
> > oversize ends and increase the chance of an inadvertant short or
> > connector issues (if the large wires cause undue stress). You

say

> > your motor is rated at 7 amps as well. What's the advantage of
> the
> > #16 here?
> >
> > Jeff
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>
> > wrote:
> > >
> > > I have high torque Nema 42 rated over 2500 oz*in motors rated

at

> 7
> > > amps with a 16 amp 75 volt powersupply. I am having great
> > > difficulty getting the 16 gauge wire into the Gecko terminals.
> I
> > > need to take them apart and look for to see if I can open the
> tab
> > > inside to get the larger wire to connect. This is a Bridgeport
> > > Series mill rather than a desktop machine.
> > >
> > > Keith
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Andy Wander
> <awander@v...>
> > > wrote:
> > > > Keith:
> > > >
> > > > You can fit at least an 18AWG in the Gecko terminals
> comfortably.
> > > >
> > > > The size you need depends on the amount of current that is
> being
> > > drawn, and
> > > > without getting ridiculous, bigger wire(smaller Gauge number)
> is
> > > better, for
> > > > reasons of resistance. If you look at the capacitance,

though,

> it
> > > goes up as
> > > > the wire size goes down(all else being equal) so this will
> come
> > > into play at
> > > > some point, but usually this is only important where you are
> > > talking about
> > > > digital signaling, where the edges of the waveform must

remain

> > > crisp and
> > > > square.
> > > >
> > > > Remember, too, that the maximum current draw of your motors
> may
> > be
> > > a lot
> > > > less than you think.
> > > >
> > > > I'm using 18AWG on my Gecko Stepper drivers, with a 53VDC
> supply,
> > > and 500
> > > > oz-in steppers, rated at 3A(the current limit on the Geckos

is

> > set
> > > at 3A.
> > > > Seems to work just fine.
> > > >
> > > > Andy Wander
> > > > Verrex Corporation
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Keith Clark [mailto:mail@t...]
> > > > Sent: Monday, October 18, 2004 7:16 PM
> > > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > > > Subject: [CAD_CAM_EDM_DRO] Re: Gecko burned out
> > > >
> > > >
> > > >
> > > > There has been some controversy about tinning versus using
> > > ferrules.
> > > > My first question is what sized wire I should be using? I am
> now
> > > > using 16 gauge wire that I have thinned (not tinned) to allow
> it
> > > to
> > > > fit into the Gecko terminals. What sized wire should I be
> using
> > > for
> > > > the phases going to the motors. The terminals are sized for
> much
> > > > thinner gauged wire but it does not make sense to use a 28
> gauge
> > > (the
> > > > size that fits nicely into the terminals)wire to connect to
> the
> > > > motors.
> > > >
> > > > Thanks
> > > > Keith Clark