Re: Help putting together Power Supply

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Tony Jeffree <tony@j...>
wrote:

> At 13:28 07/05/2003 +0000, you wrote:
> >If you use the Xylotex driver, it maxes at 35 Volts so you can only
> >use one x-frmr at 24.
>
> Using a 24 volt xformer with a 35 volt max driver (as is the case

with the

> Xylotex) is pushing your luck just a touch. When rectified &

smoothed you

> will get 34V IF the mains supply is at the nominal value. However,

you

> don't leave much headroom either for the mains voltage to be over

spec or

> for the supply to go over 35 as a result of back EMF from the motor

feeding

> current back into the supply's caps. In the UK, for example,

transformers

> are often rated for a 220V supply, but our mains is 240V, so the

smoothed

> output from a 24V supply would be about 37V.
>
> 20V transformers are a better bet for use with these driver boards.
>
>
> Regards,
> Tony

YES, and 48Volts AC from a 110 is 67.87 volts or in the 'safe' zone
for a Gecko.

at 120 volts that becomes 52.3 or a bad 74 volts for a Gecko.

Here in the States, we have huge variations, from 105 to 130
depending on the loads on the utility power grid I guess.

Dave
real happy using the Geckos at 37 volts !