Re: [CAD_CAM_EDM_DRO] Re: wiring geckos to stepper motors - common wires to where?

Hi Keith,

Yes, there is a common on the SIGNAL side of the Gecko drivers.

Are you wiring in series? then the two windings of A are connected in
series. There is one pair of leads connected together on the A set of
windings, and on the B set of windings. The connection should be
carefully insulated, do not connect them together.

You can also connect the windings in parallel.

The point I was making is that you don't have a "center tap" connected
to anything, like you would if you were wiring for unipolar.

I can get into the Gecko website, but I don't see any white papers!


Keith Clark wrote:

> Alan,
>
> Thanks for the suggestion, but I tried to get to the white papers
> but the link on the www.geckodrives.com website is not active.
>
> I realize how the com is connected to the Campbell board from the
> geckos. There is a step, dir and com between the Gecko and the
> Campbell.
>
> The question I have is about the 8 wires from the motor. 1 wire is
> for A phase, 1 for A' abd the next 2 are to be connected together
> and are called common. Then the next 1 is for B phase and the next
> B'. Then the next 2 are again connected together and labelled
> common. That accounts for all 8 wires. I am assuming that the wires
> connected together are just to be left connected to themselves.
> Only the other 4 wires for the 4 phases will connect to the Gecko at
> A,A',B, and B'. Does that sound correct?
>
>
> Thanks,
> Keith Clark
>

I'm still not following what you are saying! There are no commons.


Alan KM6VV