Re: Myford Motor help


"John Stevenson" <john@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:c10qn1547k8f6pv2d6mugscrku3j6mq4pa@xxxxxxxxxx
> On Thu, 17 Nov 2005 19:27:38 +0000, Peter Scales
> <peter@xxxxxxxxxxxxxxxx> wrote:
>
> >In message <f1qon1hkd1qers1g25r3ch58ohql6pdb7f@xxxxxxx>, John
Stevenson
> ><john@xxxxxxxxxxxxxxxxxxxxxxxxx> writes
> >>I don't use these commercially as they are missing two features
that
> >>don't matter to a home shop guy, one being you can't lock the
keypad
> >>off. To the home shop guy this doesn't matter but when night shift
get
> >>bored and decide to see if they can't get 24,000 rpm out of the
machine
> >>then it's a different matter :-)
> >
> >Distinct chuckle here :-) Just out of curiosity, what is the other
> >missing feature?
> >
> >Regards
> >
> > Pete
>
> The other feature is the ability to program a variable into the
> invertor so it reads rpm and not Hz.
> As these are single speed machines it works.
> Even with this facility on say a Myford with three step pulleys it's
> irrelevant.
>
> They are probably missing a few more but all the home shop guy wants
> is single in, three out, reliability and variable speed and these
give
> it.
> One added note, modern invertors have a setable parameter inside
where
> you set the motor amps.
> This replaces all those curly wire and trip over loads that never
> worked correctly anyway.
> Usually they will give 10% overload for xx seconds then say stuff it
> that's enough and come up with a OC display [ over current ]
> Leave for a minute, hit stop or reset and it good to go again.
> --
> Regards,
>
> John Stevenson
> Nottingham, England.
>
> Visit the new Model Engineering adverts page at:-
> http://www.homeworkshop.org.uk/

John,

Have you any experiance of the new range of inverters appearing on
eBay that take in 240 v single phase and push out 415v 3phase? Here is
an example:

http://tinyurl.com/bx8y5

Sounds too good to be true but they are rather expensive.

AWEM



.

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