You need a transformer to step it down,that is how most machines do it.
this will be a cleaner set up rather than 3ph and a 1ph line coming in.
 


________________________________
From: Brian May <bri...@diezorlich.com>
To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
Sent: Thursday, November 10, 2011 9:27 PM
Subject: Re: [Emc-users] 3 phase power

Ok that makes sense. 

Just out of curiosity, How do other machines do it. Our other cnc machines only 
have the 3 lines and earth ground running into them...

Sent from my iPod

On Nov 10, 2011, at 9:01 PM, Brian Mihulka <bmihu...@hulkster.net> wrote:

> On 11/10/2011 08:50 PM, Brian May wrote:
>> This is probably an easy question for alot af the people on the list.
>> 
>> I have 3 phase power going to my vfd on my machine.  I want to the use that 
>> same power to power all the 120 single phase components. (the dc power 
>> supply for the steppers and varios other motors. ).  This way i only need 1 
>> plug
>> 
>> I have been reading and people say i can go from 1 leg to a nuetral or leg 
>> to leg. I do not have a nuetral line so my question is will it be ok to go 
>> from leg to leg for the 120 single phase?  Or is there some other component 
>> i need?
>> 
>> Thanks
>> Brian
>> 
>> Sent from my iPod
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> If its 3 phase 208, one leg to any other leg will give you 208.  You 
> have to have the neutral to get 120 from any leg.  You should get 120 
> from any leg to ground but it wouldn't be up to code.
> 
> Brian
> 
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