Re: Gecko burned out

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