Re: Myford Motor help

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/
.

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