Re: unipolar or bipolar?

Sean,

No problem. Power supply first:

All you need is the transformer, the rectifier and the filter
capacitor. Your DC voltage is on that capacitor. The rest you
can "86" because it is not needed. Measure the DC voltage and move
the taps on the xformer primary if it isn't below 80VDC.

The motor:

Open the back cover plate. You will see 8 terminal screws numbered 1
thru 8. Some may may be jumpered (7 to 8, 5 to 6). Here are your
options:

SERIES:
Jumper 7 to 8 internally. One winding is 2 and 4. Jumper 5 to 6
internally. The other winding is 1 and 3.
Use 4 Amps for the drive phase current.

PARALLEL:
Jumper 2 to 7, then 4 to 8. That is one winding.
Jumper 3 to 6, then 1 to 5. That is the other winding.
Use 8 Amps (or 7A, cheap commercial plug) for the drive phase current.

Strip all stuff off of your heatsink, clean it, and use it to mount
the new step drives. If I were you, go with the SERIES connection at
least at first. If things are not fast enough, then go for the
PARALLEL connection.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "audiomaker2000" <audiomaker@s...> wrote:
> Thanks Mariss.
>
> You might be disgusted to learn that someone can read that several
> times and still not be enlightened. I'm sure at some point soon
> I'll wake up in the middle of the night screaming "YES!!", but for
> now, maybe you could spoon feed me some advice...
>.....
> > --- In CAD_CAM_EDM_DRO@y..., "kevinagilent" <scoob22@h...> wrote:
> > > what is the difference? what are the benefits
> > > and, or drawbacks of either
> > > thanks kevin