Re: [CAD_CAM_EDM_DRO] Re: Power supply transformer setup questions...

My Taig CNC mill controller (built by Taig, not by me, I might add) does
exactly this. Two identical transformers, primaries wired in parallel,
secondaries wired in parallel. I haven't noticed any "bucking" problems so
far ;-)

Regards,
Tony

At 08:07 10/09/2003 -0700, you wrote:

>Jeff,
>
>Why do you say that it will not work.
>
>If you have two identical transformers you should be able to wire the
>outputs in parallel as long as you have the phase correct. If the outputs
>are color coded, you should be able to wire them correctly. If wired
>incorrectly they will buck.
>
>This should be no different than using a transformer with two separate
>output windings that are wired in parallel.
>
>Bob Campbell
>----- Original Message -----
>From: "microboter" <jdavis211@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Wednesday, September 10, 2003 6:56 AM
>Subject: [CAD_CAM_EDM_DRO] Re: Power supply transformer setup questions...
>
>
> > Wiring the 2 transformers in parallel seems like a nice clean
> > solution to your current problem of needing 6.7 amps to drive your
> > motors.
> >
> > In a nutshell "NO" you can't do this. The transformers don't like
> > being wired in parallel. They will for a lack of a better term buck
> > each other. You will need to drive each Gecko with a separate 3 amp
> > or so transformer/ power supply combo, or one large one.
> >
> > hth
> >
> > Jeff
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Lloyd Leung" <lloyd@l...>
> > wrote:
> > > Is there a method of wiring two transformers of the same voltage
> > together to
> > > increase the amperage that they can supply? If possible, how
> > should I wire
> > > this up to produce a power supply? Is this a safe idea for wiring
> > up gecko
> > > G201 drives?
> > >
> > >
> > >
> > > I'm looking to go from 50VAC to 70VDC.
> > >
> > >
> > >
> > > The three stepper motors I'm going to use are: two 3V/3Amp, one
> > 4.2V/3.5Amp.
> > > The sum of amperage required for the motors is 10AMPs. So I
> > require 6.7amps
> > > (2/3rds of sum).
> > >
> > >
> > >
> > > The transformers I'm looking to _some how_ link together are:
> > >
> > > 167P50 (50VAC/5Amp)
> > >
> > >
> > > http://sales.digikey.com/scripts/sales.dll?
> > action=lineitem;itemseq=14201596
> > >
> > >
> > >
> > > 167L50 (50VAC/2AMP)
> > >
> > >
> > > http://sales.digikey.com/scripts/sales.dll?
> > action=lineitem;itemseq=14201598
> > >
> > >
> > >
> > > Additional transfers from hammond manufacturing are
> > listed here:
> > >
> > >
> > http://www.hammondmanufacturing.com/5cpwr.htm
> > >
> > >
> > >
> > >
> > >
> > > Also, there is this little vexta stepper motor I have that I may
> > want to use
> > > for a rotary table:
> > >
> > >
> > >
> > > Vexta PK569AUHA (2.8Amp/0.55 oHm (so 1.54V??))
> > >
> > >
> > >
> > > Is there a way I can add this drive into the power supply, or
> > should I build
> > > a completely different power supply for this axis? If I use 50V to
> > this
> > > little motor, it's going to cook itself.
> > >
> > >
> > >
> > >
> > >
> > > So far, I have the gecko's and the motors... I would like input on
> > how I
> > > should setup my power supply, thanks.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Lloyd, in Toronto.
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> >
> >
> >
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>OFF Topic POSTS: General Machining
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>http://www.metalworking.com/news_servers.html
>
>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
>sister site to the CCED group, as many of the same members are there, for
>OT subjects, that are not allowed on the CCED list.
>
>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
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Regards,
Tony