Re: 8-wire stepper

--- In CAD_CAM_EDM_DRO@yahoogroups.com, JanRwl@A... wrote:

> In a message dated 5/29/2003 8:58:09 PM Central Standard Time,
> salewis@n... writes:
>
> > For example, is series faster but lower torque while parallel

higher torque

> > but slower speed.<<
>
>
> No. Series has MORE inductance, so will have to run SLOWER. The

only

> advantage (slight, and often inconsequential!) is that a lower-

current PSU can work.

> The Parallel has LOWER inductance, so will run FASTER, but

requires half the

> current from the PSU.
> >
> > Given that all controllers and power supplies are not equal, yet

for the

> > same controller/power supply what would be the difference between

parallel and

> > series?<<
>
>
> If you are "stuck" with a given DRIVER (NOT controller

Termonology is critical.
The 'controller' is the PC or computer running the software sending
the step and direction signals.

The DRIVER receives those signals and drives the steppers.


jan, is this correct ?

> The Parallel has LOWER inductance,
> so will run FASTER, but requires
> half the current from the PSU.

I had thought that series was half current with the benefit of lower
motor temperatures, but the disadvantage of lower high speeds.

single coil offeres higher high speeds, but runs the motors hotter.

and parallel also ran at full amps, full high speeds and because the
watts in the motor are the same as single coil, got the motor hot.

bty, a hot motor is not a problem unless you touch them, and then it
is only your fingers that suffer. They are rated for high temps and
should be very warm to the touch.

I think I need to go back and read Mariss's white paper again.

Dave