Re: Stepper Motors

---I have been playing around with stepper motors in a hobby
capacity for several years and have come to the following
conclusions.
I believe that the difference between series and parallel wound and
wired steppers does not apply when using the parallel port.
I have wired 8 lead motors in both series and parallel and timed the
moves and found no difference. I use new, current rather expensive
microstep drives that req. some switch changes to optimise different
motor charateristics. Even doubling a 24v supply did not make the
difference that gets discussed about on lists.
I do not use my best computer in the basement but after finding that
there is little difference between timed G00 moves when using an old
486/33 and a less old P/133 I did not think using a better computer
would change things too much.
I use TCNC which suits me so perhaps there are programs that can
output a faster step rate?
I could be wrong but I do not think with my setup I get to the part
of the curve where speed and torque drop off occur so there is
little point worrying about things like series, parallel, voltage,
inductance and torque reduction. Studying manufacturers specs seem
to qualify this for me.
Indexers seem be to used in industrial applications of steppers so
perhaps they can output a step rate where there would be a
difference in performance with series or parallel configurations?
T
In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:

>
>
> jess@p... wrote:
>
> >What is the advantage or disadvantage between these two stepper

motors 2.5A

> >and 4.5A .
> >
> >H34013 Step motor 1076 oz in 2.5A 3. ohms
> >H34014 Step motor 1076 oz in 4.5A 1. ohms
> >
> >
> The 34014 motor will produce the same torque at a somewhat higher

speed

> than the 34013 motor, because of the lower resistance and

inductance.

>
> However, both of these motors will be severely limited at higher

speeds

> due to the high resistance. For a 1076 Oz-In motor, you really

want a

> super-low
> resistance motor, with perhaps a rating of 7A / phase if used with

Gecko 201

> drives, or even higher if using drives capable of greater current.
>
> I'd take a wild guess and say that even the 34014 motor will run

out of

> torque
> well below 1000 RPM.
>
> Jon