CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board?

on 2001-07-05 12:57:17 UTC
Right Jon,

That's why I mentioned going DIRECTLY across the filter cap. Ignore the
regulation! Another way to lower the UNREGULATED output voltage is to
connect a small filament transformer in SERIES with the primary to BUCK
the primary voltage by 5, 6, or 12v (would also work if one wanted to
raise the voltage a little, but watch the caps!).

I've also acquired "the lot" of new, unused 28v 6A transformers. Dual
primaries, each with additional tap. If anyone is interested, contact
me off line.


Alan KM6VV


Jon Elson wrote:
>
> Alan Marconett KM6VV wrote:
>
> > Hi Randy,
> >
> > Nice find! If you find another one, give me a call! I've come across a
> > source of 28v, 6A transformers; I'm going to run them in parallel, and
> > maybe even series-parallel. Now to find a bigger cap, I have a 40K, 50v
> > cap, but would need a higher voltage for for series, and more C for
> > parallel.
> >
> > Your supply sounds like too much for the L298's, IMO. You might examine
> > the primary taps, I assume it's regulated, you could lower the taps, and
> > pull off voltage directly across the filter cap. That might possibly
> > lower your voltage to an acceptable value.
>
> If it is regulated (sounds like it) changing transformer taps won't
> do anything until it drops out of regulation. There should be a voltage
> adjust pot on the circuit board, but it probably only has a +/- 5%
> range. You might need to modify the circuit a bit to drop the regulated
> voltage. Or, you could turn the voltage down with a variac, and live
> without regulation.
>
> Jon

Discussion Thread

Bruce 2001-07-03 16:18:58 UTC RE: Vacuum table Randy Gordon-Gilmore 2001-07-04 17:49:13 UTC 48V 10A! Mauch 2A board? Alan Marconett KM6VV 2001-07-04 19:16:13 UTC Re: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board? Jon Elson 2001-07-04 23:35:35 UTC Re: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board? Randy Gordon-Gilmore 2001-07-05 00:25:26 UTC Re: 48V 10A! Mauch 2A board? Dan Mauch 2001-07-05 10:28:06 UTC RE: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board? Alan Marconett KM6VV 2001-07-05 12:57:17 UTC Re: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board? ballendo@y... 2001-07-06 21:19:05 UTC Re: 48V 10A! Mauch 2A board? cncdxf@a... 2001-07-07 09:15:13 UTC Re: 48V 10A! Mauch 2A board? alipavsky@c... 2005-08-13 20:34:38 UTC Vacuum table baccus61 2005-08-14 05:56:49 UTC Re: Vacuum table hippodan 2005-08-14 08:36:53 UTC Re: Vacuum table turbulatordude 2005-08-14 10:54:48 UTC Re: Vacuum table davegsc@t... 2005-08-14 12:22:01 UTC RE: [CAD_CAM_EDM_DRO] Re: Vacuum table Denis Casserly 2005-08-14 18:29:22 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table turbulatordude 2005-08-14 19:14:23 UTC Re: Vacuum table Aahz. 2005-08-14 20:16:56 UTC Re: [CAD_CAM_EDM_DRO] Vacuum table caedave 2005-08-15 01:41:08 UTC Re: [CAD_CAM_EDM_DRO] Vacuum table Marv Frankel 2005-08-15 02:31:46 UTC Re: Vacuum table notoneleft 2005-08-15 06:57:32 UTC Re: Vacuum table R Rogers 2005-08-15 07:17:05 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table Aahz. 2005-08-15 08:06:50 UTC Re: [CAD_CAM_EDM_DRO] Vacuum table John Johnson 2005-08-15 18:12:28 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table wanliker@a... 2005-08-15 18:33:01 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table turbulatordude 2005-08-15 18:47:50 UTC Re: Vacuum table - drag cutter Andrey Lipavsky 2005-08-15 18:52:50 UTC RE: [CAD_CAM_EDM_DRO] Re: Vacuum table wanliker@a... 2005-08-15 18:56:30 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table John Johnson 2005-08-16 06:24:36 UTC Re: [CAD_CAM_EDM_DRO] Re: Vacuum table - drag cutter Ron Ginger 2005-08-16 06:49:38 UTC Re:Vacuum table Russ Waters 2005-08-16 07:33:19 UTC Re: [CAD_CAM_EDM_DRO] Re:Vacuum table....No vacuum need for most applications! Andrey Lipavsky 2005-08-16 07:36:59 UTC RE: [CAD_CAM_EDM_DRO] Re: Vacuum table