myford super7 3 phase conversion (again)

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Subject Author Date
myford super7 3 phase conversion (again) nickphill 03-02-2008
Posted by on March 2, 2008, 6:57 pm
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>
>
>
> > On 2 Mar, 17:10, "Norman Billingham" <norman.at.tumulus.org.uk> wrote:
>
>
.
>
> > > > I'd like to convert my Super 7 to 3 phase. I think I will go the
> > > > inverter route. Can anyone point me at a solution that won't require=
a
> > > > lot of electrical troubleshooting. I haven't got 3 phase to the hous=
e.
>
> > > Depends how much cash you have and how much trouble you want. =A0For a=
"plug
> > > and play" solution look at the Newton Tesla setup:
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> > >http://www.newton-tesla.com/machinist/index.htm
>
> > > Not cheap but very easy to fit and works like a dream - just swap the =
motor
> > > pulley to the new motor, bolt the motor into place and plug into the
> > > controller
>
> > > Alternatively, a three phase motor and something like the Eurotherm dr=
ive:
>
> > >http://www.eurotherm.co.uk/products/drives/ac-drives/ercfw08-series/
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> > > Either way, well worth doing
>
> > post in the yahoo myford group that you would like to do this
>
> > and I'm sure there will be one or two members there ...who have gone
> > the other way
>
> > and taken all the three phase equipment off their three phase
> > machine ...
> > and gone to 240 volt
>
> > and will only be too willing to sell you the old gear .
>
> > all the best.markj- Hide quoted text -
>
> > - Show quoted text -
>
> doh ....im getting confused .....
> the items i mentioned are boxford !!!!!

ahh ,...

Posted by lemel_man on March 3, 2008, 3:05 am
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nickphill@gmail.com wrote:
> I'd like to convert my Super 7 to 3 phase. I think I will go the
> inverter route. Can anyone point me at a solution that won't require a
> lot of electrical troubleshooting. I haven't got 3 phase to the house.
> Thanks
> Nick
Its really simple; just get a 3-phase motor to replace the single phase
one you have, and a matching single to 3 phase inverter VFD. Make sure
the motor you get is the type that can be rewired for delta (240v) or
star (415v) - these have 6 terminals and 3 "straps" inside the
connection box. You can get 1-3 phase inverters with built-in voltage
transformers (240-415), but they are expensive - its cheaper to get a
re-wireable motor.
The biggest problem I came across was in deciphering the manual for the
inverter - I eventually discovered that they are notoriously abstruse.
My first inverter was a Mitsubishi S520 and when I eventually figured it
out it worked fine. I have subsequently converted 3 milling machines and
a drill press - all using Mitsubishi inverters.
I can help with setting-up the inverter - as long as its a Mitsubishi.
Once you have electronic speed control you'll never want to go back.

--
Regards, Gary Wooding
(To reply by email, change feet to foot in my address)

--
Posted via a free Usenet account from http://www.teranews.com


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