Re: Opinions/ideas on figuring out 8 wire steppers

It still seems like the A and B phases could be backward and opposite
polarity and make it step in the 'correct' direction. This might not
cover the bases... any opinions? -Lee

> If all else fails:
> Brute-force method:
>

======================================================================

> ======
> Verify with a known good motor( 4,6,or 8 wire) that the Gecko is
> connected to step a motor correctly. ( ie power and step/dir signals
> are good and working ) Note: always power down while changing
> connections!!!!.
>
> Now on your motor to be tested:
> Test continuity for each of the coils and verify good. Put temp

tape

> around the coil pairs wire insulation to bundle them together but
> leave room to put additional labels.
>
> Then try all combos of single coils, 2 at a time , on the Gecko
> terminals A+/A- and B+/B-, until the Gecko steps a set

correctly.

> As soon as you figure out the 1st stepping set, label them A1+ and

A1-

> , B1+ and B1- according to the Gecko terminals A+/A- and B+/B- and
> remember the direction it stepped !!!!. Disconnect these now-

labelled

> wires and keep them isolated and off to the side. ( tape em
> temporarily)
>
> The remaining 2 sets of coil pairs should now also cause stepping
> when connected to the Gecko terminals A+/A- and B+/B- . The 2nd
> combinations should go in the same direction as the 1st labelled

set,

> if not flip the connection on A+ and A-, then the motor will step

in

> the same direction as the 1st set.
>
> For the 2nd set that causes stepping in the same direction label:

A2+

> and A2-, B2+ and B2+ as connected to the Gecko terminals A+/A- and
> B+/B-.
> Now for series you can hook them up as
> GeckoA+ to A1+, A1- connected to A2+, A2- to Gecko

A-

> GeckoB+ to B1+, B1- connected to B2+, B2- to Gecko B-
>
> And have some Beers if you drink Beer ? I dont really that much
> anymore. :-)