Re: [CAD_CAM_EDM_DRO] 8-wire stepper

In a message dated 5/29/2003 8:58:09 PM Central Standard Time,
salewis@... 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!) which will handle,
say, a max. of 3 amps, but your motors "want" 5 amps if connected in parallel,
then they would "want" only 2.5 amps if connected in series, so this DRIVER
would not be overstressed with the series connection (assuming it was rated for
the VOLTAGES involved!). BUT, you could not run this motor/driver combination
as fast as you might, were the Driver able to handle 5 amps, and you
connected the windings in parallel!

Sorry for the verbosity, but this is hard for some folk to perceive if not
"drummed home". Jan Rowland







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