RE: [CAD_CAM_EDM_DRO] Re: Stepper Dissasembly

Mariss,

Does this mean that the drives have a lower limit on the inductance they can
handle? Are there very low inductance (by design) stepper motors that would
cause a problem with a G2xx? I am wondering about a motor rated as 1.45V
15.2 AMPS with an unknown inductance?

Tim
[Denver, CO]

> -----Original Message-----
> Jon,
>
> Hi. Actually they were. They are a non-recirculating design, so they
> absolutely depend on having a sane V/L ratio.
>
> Once the current limit threshold is reached in a switching cycle, all
> that happens is the bridge reverses polarity across the winding for
> the balance of the cycle. If the load is essentially resistive,
> (couple of ohms, negligable inductance), currents are uncontained and
> thermal failure quickly follows.
>
> Mariss
>
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