Re: [CAD_CAM_EDM_DRO] Re: welding machine as a power supply

Perhaps a stupid question; If the diode bridge keeps blowing due to
overload, why not just install a heavier unit? It is probably cheaper
and easier to do that than add a complicated soft start circuit.

Pete.

----- Original Message -----
From: "ibewgypsie" <ibewgypsie@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, March 22, 2004 5:04 AM
Subject: [CAD_CAM_EDM_DRO] Re: welding machine as a power supply


> Yep, pretty much what I was doing with my switch. Bypassing some 20
> ohm resistors.. Problem was, I was switching off my stepper supply at
> limits end. Had to remember to reset switch each time power up.
>
> I got some really large diodes (100 amp) to use for a bridge. That'll
> make is tougher. Just not had time to hook them up yet. Kinda been
> busy with lifes other problems.
>
> David
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Roy J. Tellason"
> <rtellason@b...> wrote:
> > On Sunday 21 March 2004 09:48 pm, Roy J. Tellason wrote:
> >
> > > For a solution to that what you want is what's called a "soft start"
> > > circuit. This basically consists of some big resistors in series
> with the
> > > primary side of the transformer which are shorted out after the
> system has
> > > some voltage on it, typically with a relay. Check
> > > http://sound.au.com/project39.htm (I think) for a page that describes
> > > building these for audio amps. He gives all of the formulas you
> need to
> > > figure this stuff...
> >
> > Whoops, that URL is incorrect -- the correct one is
> > http://sound.westhost.com/project39.htm
> >
> > Sorry about any confusion...
>
>
>
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