Re: simple stepper power question.

Hi Mariss,

This sounds like a plan for a DC motor, are you saying it will work for
a STEPPER motor too?

Alan KM6VV


mariss92705 wrote:

>
> Dave,
>
> Yes there is. All you need is a multimeter and a calculator. Do the
> following:
>
> (1) Measure your DC voltage accurately
> (2) Set the meter to DC Amps
> (3) Put it in series with the power supply to the drive
> (4) Run the motor at a known speed (greater than 1 rev / sec)
> (5) Measure the power supply current at no load on the motor
> (6) Now the tricky part. Load the motor down and note the current at
> the moment the motor stalls. This may have to be repeated several
> times to get an accurate reading.
> (7) Take the difference between the no-load current and the stall
> current. Multiply the result by your power supply voltage. The
> product will be the motor output power in Watts mechanical.
> (8) The torque at that speed will be: oz-in = Watts * 4506 / full
> steps per second
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...> wrote:
> > is there a formula to determine power of a stepper ?
> >
> > I have a Slo-Syn NEMA 34, 1.7 volt, 4.5 amp
> > single stack.
> >
> >
> > Also, has anyone put together a simple test
> > for stepper power ? Seems like a weight,
> > and a long crank arm with holes drilled
> > each inch would allow one to keep moving
> > the wieght farther out until the motor
> > started missing steps.
> >
> > Dave