RE: [CAD_CAM_EDM_DRO] STEPPER TORQUE THREAD

The easiest way to build a dyno is with a positive displacement water pump.
The input shaft is supported by beaaring blocks while the pump body is
allowed to rotate. Mount a lever arm on the pump body and attach a force
transducer (euphemism for fish scale) on the other end of the arm.

Don't forget to run hoses from the inlet and outlet to a bucket of water.

Doug

> -----Original Message-----
> From: Joe Vicars [SMTP:jvicars@...]
> Sent: Wednesday, April 26, 2000 12:12 PM
> To: CAD_CAM_EDM_DRO@onelist.com
> Subject: [CAD_CAM_EDM_DRO] STEPPER TORQUE THREAD
>
> Sounds like what we need is a simple way to dyno a stepper. Most of
> us (I think) are using surplus stuff. Alot of my motors don't even have
> nameplates. It is unlikely that I would be able to find manufacturers
> info on my larger motors. I guess I could take a motor of similar size
> and windings and compare. Mikrokinetics.com provides torque curves for
> lots of motor sizes, and all the different wiring schemes, BUT the
> torque curves are calculated using THEIR drivers at THEIR voltages,
> which can be very different from YOUR drivers.
> So if you really want to optimize your system you need to know the
> rough shape of your motor/driver power curve. Anyone got any ideas on a
> simple stepper dyno??
> peace
>
>
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