Re: [CAD_CAM_EDM_DRO] Stepper Temperature

With chopper drives (e.g. geckos) the main contributor to heating is often
the supply voltage, not the current. The amount of heat generated increases
exponentially with increasing supply voltage due to 'iron losses'.
If someone has already set the current I wouldn't fiddle with it. If the
stepper runs too hot to hold for more than 10 seconds then it is running
near it's limits.
The (very expensive) steppers on our wood router at work will die if they
run at much over 100 deg C so we fitted a thermometer and told the operator
to turn it off when the motor reached 70 deg C. Since fitting the
thermometer we have had no more failures.

Les

> Is there a way to determine if your steppers are running too hot? Any

guidelines on how hot they should run? I purchased a "package" from ebay.
The power supply and gecko drives were alll mounted on an aluminum plate
complete with heat sink. However, the motors do not have any ratings on
them. No text whatsoever. I can reduce the current to the windings but that
will reduce my torque and I'd like to keep it as high as I can without
overheating the motors. Any comments are appreciated.

>
> TIA
>
> Scott
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