RE: Unregulated power supply

Welcome to the club of the electronically clueless. I am a card carrying
member myself. If it wasn't for the help of people like Dan, Mo, Jon, and
Matt on these things I would be a goner.

The hookup for an unregulated power supply is very easy. Line voltage AC to
the transformer primary, from the transformer secondary you have your
stepped down AC that you feed into the rectifier, then you run the DC output
from the rectifier to your controller with the capacitor hooked in parallel
with the controller. The cap is an electrolytic so watch the polarity.

[AC in]
| |
| |
[Transformer]
| |
| |
[rectifier]
| |
| |
[Capacitor]
| |
| |
[Stepper Controller]

I know, crappy graphics, but ASCII art is not a strong suit for me. You
should probably put a fuse in on the AC supply side.

To up the amperage just parallel 2 transformers, but be sure the phasing is
correct.

You can get the parts from any supplier you want, but the transformers can
be hard to find. The rectifier and the cap is a pretty common unit. Yes, Dan
has these parts listed under the servo system, but they are applicable to
building an unregulated power supply for any task. No, there are no other
parts needed other than wire, connectors, a switch and a 110 v wall plug.

Hope it helps,


Tim
[Denver, CO]

> -----Original Message-----
> From: Gary Passon [mailto:gary@...]
> Sent: Sunday, August 08, 1999 11:12 AM
> To: CAD_CAM_EDM_DRO@onelist.com
> Subject: Re: [CAD_CAM_EDM_DRO]
>
>
> From: Gary Passon <gary@...>
>
> Wow.. More helpful info, but now I've got a couple of more
> questions. If this gets overwelming
> let me know. First, is there a schematic for assembling a 20 amp
> supply from DanM's transformers.
> I went to his site and these parts see to be part of the servo
> description. Do I need any other parts
> from DanM site (or better yet is there anything else I can use..
> short of time, longer on credit cards
> (bg)). Is there a super overschematic? Electrical stuff kinda
> baffles me, but I'm a good robot!
>
> TIA... to the "chips"
>
> Gary Passon