Re: [CAD_CAM_EDM_DRO] Power supply

If you cannot remove windings without making a mess
of the transformer you can add an additional winding
and connect it in reverse to buck the voltage down.
Some times that is easier.

Pete.

----- Original Message -----
From: "Abby Katt" <cncgroupnospam@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, June 24, 2006 8:05 AM
Subject: Re: [CAD_CAM_EDM_DRO] Power supply


> Mina, Hi
>
> If the transformer is a toiroidal type you should easily be able to take
> a few windings of the secondary. First try and count how many are there
> - then work out the ratio of the number you need to remove. Remove about
> 50% of these (to be safe) then check the voltage again, repeat.
>
> Don't forget to use a file on the free end up the copper wire before you
> solder it - it's coated with a nonconductive layer which needs to be
> removed to expose the bare copper. I had to do this for my Sherline as
> I'd not accounted for the power-rise when buying the transformer.
>
> If your xformer is the gool-old-fashioned (with metal frame and laminate
> layers) type, it may be a bit trickier (and more dangerous), however.
> Good luck!
>
> Abby
> (http://www.silverkatt.co.uk)
>
>
>> Hi,
>>
>> I'm trying to rebuild the power supply that came with an old lathe,
>> the Transformer is good I took 65 AC from the output fed it to a
>> bridge to get the DC and then on to a Capacitor.
>> The thing is the DC voltage after the bridge is stable at 65 VDC but
>> after the Capacitor it grows up to 90 VDC which is too high for my
>> Geckos 320.
>>
>> Any advise?
>>
>> Mina F.
>>
>> [Non-text portions of this message have been removed]
>>
>>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>