RE: [CAD_CAM_EDM_DRO] POWER SUPPLIES

I have one of these power supplies from MPJA and it worked fine for my CNC
setup. What I had to do to make it work with my drivers was to place a
15000 uf 35 wvdc electrolytic capacitor across the output in series with a
10 watt resistor. This stabilized the output so that my Camtronics 5AMP
Bipolar Chopper drivers would work with it. I have since built a linear
supply but I was able to use the MPJA unit successfully until I could build
a linear supply.

John Guenther
Sterling, Virginia

> -----Original Message-----
> From: J [mailto:jaredts@...]
> Sent: Monday, September 23, 2002 14:19 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] POWER SUPPLIES
>
>
>
> Thanks for the advice, Tim. The white papers you pointed me to
> are very informative. After checking out the power supply in
> question, it is a switching power supply (rats!). Here's the url
> if anyone wants to look at it:
> http://www.mpja.com/product.asp?product=12613+PS I sure don't
> need extra headaches right now, so I guess I'm still on the hunt
> for a power supply and information about them. I will take your
> advice and do some more searching through the group's posts.
> Anyone with a good source for a 24v linear power supply is
> welcome to help me out.
> Tim Goldstein wrote:Power supplies are a very common topic and
> there is a lot of material if you
> search on the website. The best reference I can point you to is
> the stepper
> white papers on the Gecko Drive site.
> http://www.geckodrive.com/ycom/documents/C163R16_power_supplies.pdf will
> take you to the power supply section, but I would recommend the complete
> white paper as must type reading.
>
> $60 for a 24 v 8.5 amp supply is a good deal if it is a linear supply and
> not a switcher. Switch type supplies can be made to work, but
> sometimes will
> cause you additional troubles you don't need as a beginner.
> Better to stick
> with a linear supply.
>
> Tim
> [Denver, CO]
>
> ----- Original Message -----
> >
> > I've gotten some really good advice from this group on how to
> get started,
> but I still need to come up with a power supply. Are the electrical
> engineers out there the only ones building their own, or are there
> schematics out there for less knowledgeable persons like myself?
> One expert
> has pointed me to a 24v, 8.5amp supply for $60 that should match
> my planned
> configuration. That doesn't sound too expensive, I guess, but I was
> wondering if there was a cheaper way (or a surplus source maybe). My
> internet searches have yielded unbelievably high prices.
> >
> > --Jared
>
>
>
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> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
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> http://groups.yahoo.com/group/jobshophomeshop I consider this
> as 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 THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
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