Re: simple stepper power question.

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