Re: [CAD_CAM_EDM_DRO] Enclosures and Power supplies

On Wed, 01 Oct 2003 10:03:22 -0500, you wrote:

>>
>>
>>>Anyone else use a PC power supply for this type of purpose? Any hints?
>>>
>>>
>>
>>The 12 volts should be ok for the boards you have, but you'd really
>>like more voltage for better high RPM performance.
>>
>
>Fair enough. I have some 30V power suplies, but they're small enough
>that I'd probably want to use 1 supply per motor...hardly an ideal scenario.

The 30 volt supplies will be ok for the motors, voltage wise, but a
bit high for the 5 volt regulators, which would prefer about 8 to 12.

>
>>You'll still need the 5 volt separate supply for the optoisolators for
>>the computer, but that's no big deal.
>>
>
>How separate?

Electrically separate, no common ground. Remember the purpose of the
5 volt supply wired in on pin 3 is to run the optoisolators and
nothing else.

>Keeping in mind that there will be multiple connectors
>for the multiple drives (drive enclosure), would that be separate
>enough? Or are we talking about a completely separate unit? I'm not
>sure how things are split out in a switching supply.

in a computer supply, everything is to a common ground.

Harvey

>
> -- Chuck Knight