Re: [CAD_CAM_EDM_DRO] Re: Gecko connection to unipolar stepper??

Mariss,

I was using a 15k resistor as the white paper said to use half the current. I must've misread that. The problem was the jumper on the Breakout board was set common to ground instead of 5v.

Anyways, What a difference!! Almost three times as powerful! Man these are nice drives. It's so quiet, I didn't even know it was running. I'm still checking things with a meter and hit the jog key for the hell of it and away it went.

Most pleased, Thanks, Ron

Mariss Freimanis <mariss92705@...> wrote:
So far so good; that is correct. Make sure the two unused wires are
insulated and not touching each other or anything else. Use a 33K
current set resistor, connect 5VDC from your PC to COMMON (term 10),
STEP and DIRECTION and you're good to go.

Mariss


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "rogersmach"
wrote:

>
> Hey guys,
>
> Here is what I have and what it's doing..
>
> I'm trying to connect a 6 wire unipolar 3 volt 3 amp stepper to a
> Gecko 201 drive.
>
> With an ohm meter and a D size battery I determined which set of
> windings are which.
>
> A and a lead are I'm assuming one full winding. As the ohmeter

shows

> 2.3 ohms across it. If I take either a or A lead to common I get
> half the resistance. Hence, half the winding. I connected A to

phase

> A and a to phase B on the Gecko. Same with the other set of
> windings. B to phase C and b to phase D.
>
> Have 34 volts DC coming in. Power light comes on and nothing. No
> smoke no pop no motion. I don't know if I have the step and dir

pins

> called out properly in the software. I'm checking that now, thought
> that may enable it somehow.
>
> Any input on this would be most appreciated.
>
> Hope I didn't blow this thing...
>
> Thanks, Ron
>

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