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Benchtop power supply for steppers — Parallax Forums

Benchtop power supply for steppers

ArchiverArchiver Posts: 46,084
edited 2003-05-12 03:45 in General Discussion
--- In basicstamps@yahoogroups.com, John Walton <john@l...> wrote:
> Can anyone suggest a good bench top power supply and where to get
it? I'm
> starting to play with stepper motors, and my wall warts just aren't
cutting
> it. I'm tired of trying to find just the right one with enough
capacity for
> what I'm driving.
> I'm not allergic to spending a couple of hundred dollars, just as
long as
> it is a good one.
>
> Dual outputs? Adjustable? Anything I left out?
>
> This is kind of off topic, but I'm betting you guys are a pretty
good resource.
>
>
> Thanks,
> -John


Hi John,

you should be able to use just a transformer, rectifier and cap (big
cap) to power steppers. no need for regulated power supplies.

be careful as the cap size needs to be BIG. figure 20k uF or so.
and also when you go from AC to DC you will pick up the peaks of the
AC, not the RMS, so multiple your AC RMS value by 1.414 to determine
your DC voltage. or your ac less the drop from the diodes or
rectifier, then times 1.414.

Dave

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-05-12 03:45
    Haa Haa, Dave thinks I know what I'm doing! Thanks for the info (I printed
    it and added it to the "some day when I'm smarter" pile. I do really need
    a good power supply. I'm tinkering enough now that I should have one.

    Thanks again,

    -John




    >Hi John,
    >
    >you should be able to use just a transformer, rectifier and cap (big
    >cap) to power steppers. no need for regulated power supplies.
    >
    >be careful as the cap size needs to be BIG. figure 20k uF or so.
    >and also when you go from AC to DC you will pick up the peaks of the
    >AC, not the RMS, so multiple your AC RMS value by 1.414 to determine
    >your DC voltage. or your ac less the drop from the diodes or
    >rectifier, then times 1.414.
    >
    >Dave
    >
    >
    >
    >
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