Re: [CAD_CAM_EDM_DRO] Electrical Wizards ?

Hi Chris,

The problem is, there is no ISOLATION from the 115V AC mains! Not a
good idea! DANGEROUS, even!

Use a transformer to get the required isolation. A 250/120 isolation
transformer used on 115V input could work for your friend.

HTH

Alan KM6VV


Chris L wrote:

>
> I have a really, really dumb question. A friend of mine asked why he
> could not "Dial down" a variac and use it to supply power for a stepper
> driver system. I could only conclude that there is the chance it could
> not maintain the voltage accurately, in fact even fail miserably,
> because it is nothing like having Primarys and Secondarys of a
> transformer. true ??
>
> Then I was wondering what actually happens if Variacs are used to supply
> a transformers primary winding. If it was all setup, and running some
> stepper drivers and you dialed down the voltage, What do the Stepper
> motors do ?
>
> Slow Down ? get weak ? What ?
>
> I slept thru most of electronics class.... now I pay for it.
>
> thanks,
>
> Chris L