>> Gents,
>>
[quoted text clipped - 25 lines]
> help; I have a DC motor and controller from a washing machine which I
> would like to use on my lathe to obtain speed control.
Could be grunty enuff, depending on the lathe - let's assume a Myford or
similar, needs about 2/3 HP, mebbe even a Boxford at 1.5 HP or so - but
I've never come across a DC main motor in a washing machine. Are you
entirely certain it's DC?
I guess I only get to look inside old washing machines, but I've looked
at quite a lot of them...
The only
> problem I have is I haven't got a wiring diagram and have no idea
> where to find one although I have trawled the net.
>
> If I junk the existing controller, what I would like is information so
> I can make or buy a suitable controller.
make is not really practical, even if electronic genius, easier to earn
money and buy one.
buy yes, but it will take time and looking if you want a cheap one, see
below.
> What I presumably need is a method of rectification and a speed
> controller. The only controllers I have found have been too expensive
> to make the project worthwhile.
I bought a 3/4 HP Leeson Speedmaster DC motor controller for £12.71 on
fleabay a fortnight ago - been looking for a bargain for six months or
more - and bought a 650W 90V DC motor for £14 several months before that.
But there have been several 0.5-1.0 HP inverter drives going at sub-£40
prices on fleabay recently, rather than the £90 or so they were a few
months ago, maybe worth a look?
However, you will then need a dual-voltage 3-phase AC motor ... come to
think of it, I need to buy one too, as I just bought a 3/4 HP inverter
for £19 odd ...
:)
-- Peter Fairbrohter
dam cant speel my one name
> Any assistance gratefully received.
>
> John
Mark Rand - 31 Mar 2009 00:47 GMT
>> Hi Bob
>>
[quoted text clipped - 6 lines]
>I've never come across a DC main motor in a washing machine. Are you
>entirely certain it's DC?
Hotpoint (Cough, spit) use universal motors. Bought one. Got a company
discount (part of GEC in the good old days). Will never buy another one. Any
washing machine that needs new motor brushes every 6 months is defective by
design.
Mark Rand
RTFM
John has brought this to us :
> Peripheral to your question, I wonder if you, or anybody else could
> help; I have a DC motor and controller from a washing machine which I
> would like to use on my lathe to obtain speed control. The only
> problem I have is I haven't got a wiring diagram and have no idea
> where to find one although I have trawled the net.
This might give you some ideas about the circuit theory.
http://homepages.which.net/~paul.hills/SpeedControl/SpeedControllersBody.html

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk