Re: Power Supply-- more questions

Thanks Bob, actually as long as I know that I can double the current
by just wiring parrellel then I'm ok.. The unit I'm looking at is
#127033201 its 1500va 50VAC and 15A I could also go 1 model down
to 45V and 16A however this may put me slightly over on current.

Also another question. I can across some Pacific Scientific
steppers. They are NEMA 34's rated at 850oz, but they call for
32VDC? Does this mean thats the driver rating [ the finaly 25 times
number] or would a person have to run them at 32 x 25= 800VDC? Seems
awful high for alittle unit like that..

Curious..

Jarrett [I REALLY want to get past this power supply stuff on onto
the interesting parts :-)]

> Jarrett,
>
> If you want to use a Plitron transformer, I will look up the part

number for

> you. I would recommend using a transformer with about 48 volts AC

output.

>
> Most of their transformers come with two sets of output windings.

At 48 VAC,

> I would run them in parallel.
>
>
> Bob Campbell
> Bob Campbell Designs
> www.Campbelldesigns.com
> Mach 2/3 breakout boards
> Relay boards
> Spindle Speed boards
> Stepper motors
> Plasma Torch Height control
>
> ----- Original Message -----
> From: "Jarrett & Heidi Johnson" <hjjohnson@s...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Sunday, January 08, 2006 11:45 PM
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Power Supply-- more questions
>
>
> > Bob, I got reading your white page about power
> > supplies and what not that you sent me a link for.
> > In it you state that you used a Plitron Toroid
> > transformer # 077015201 This unit is rated at 22V
> > and 6.28A, however in your text you noted that it
> > will produce 13.26A [ ish] so.. I'm wondering if
> > it had two leads which you could connect to double
> > the current? If so.. then spec'ing a Toroid from
> > them just got a whole lot easier.
> >
> > Thanks!
> > Jarrett
> >
> >
> >
> >> Jarrett,
> >>
> >> You do not need 25 times. I would go with a 48
> >> VAC transformer which would
> >> give you about 67 volts DC.
> >>
> >> Your Gecko drives will not draw the full 24
> >> amps. You need to derate it by a
> >> factor of about .6 which brings it down to about
> >> 16 amps.
> >>
> >> I would go with one 18,000 mfd capacitor.
> >>
> >> Bob Campbell
> >> Bob Campbell Designs
> >> www.Campbelldesigns.com
> >> Mach 2/3 breakout boards
> >> Relay boards
> >> Spindle Speed boards
> >> Stepper motors
> >> Plasma Torch Height control
> >
> >
> >
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