Re: Thanks - was: Things to check? is now: RUNNING~!

Hi,

Start simple, wire for the lower amps. it can't hurt, but it saves
your A$$ on burning things up.

I assume you used your multi meter and connected the 2 lowest
resistance wires for single coil.

You said parallel, but didn't mention that these were 8 wire motors.

If they are 6 wire, then your single coil wiring would be the lowest
resistance, and one of your wires and the unused wire would have
twice the resistance.

Series or two coil would offer the 2 highest resistance wires and
then isolationg the 3rd WOD* from everything,

as mentioned on an earlier post, resistance can be tested on the
screw terinals of the Gecko.


Dave


* WOD - Wire Of Death. an free wire that can touch things and
release magic smoke. WOD is a term for those stray wires that touch
things and sparks fly out.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Weyland <weyland@v...> wrote:
> Hey dude,
>
> On Thursday 18 September 2003 10:51 am, turbulatordude spake:
>
> > If you SERIES wire the motors, then use HALF AMPS.
> >
> > they will be slower, but COLD.
>
> It might come to that. We'll see.
>
> > it sounds like you might have series wired AND used full amps ?
>
> No, I'm positive now that I wired them parallel and full amps.
> (finally found the schematic for the motors, and was VERY
> careful wiring them because I didn't wanna chance blowing
> up the Geckos after that last fiasco...)
>
> > I would say to work the machine thru some paces before you start
> > shooting for high speeds.
>
> Agreed.
> These were just some notes on my initial impressions.
> To note -
> I've watched Jeff's video a few times, and while I realize he's
using servos,
> I'm pretty sure these steppers are more powerful and should be
pretty quick.
> They're Nema 42's, 635 oz/in.
>
> <stops to look at spec sheet>
>
> Ohhhhhh... crap....
>
> My ignorance and confusion has bitten me in the @ss again...
>
> There's two sheets here, both referring to
> my motors, both having differring values.
>
> I'm willing to bet I'm using the wrong one.
> One of them specifies 3.5A Unipolar, and 5.0A Bipolar.
> So which is which?
> Uni=series? Bi=parallel?
> Hmmmm....
>
> > How fast are you stepping/pulsing ?
>
> No idea.
> I'm using a stock BDI-LIVE rc23 on a HP PIII 800Mhz laptop.
> What else can I tell you that would help?
>
> Best,
>
> Weyland