Re: [CAD_CAM_EDM_DRO] Big, Cheap Power for Steppers

Tony, make sure the primary was originally wound for 230 Vac, not 115Vac,
or else you'll have trouble. Assuming the original was for 230V, the
volts/turn will now be 24/23rds a little over 4% higher, with 240Vac, but
generally acceptable. YES, do use enameled magnet wire, if you can get your
hands on some (call your local electric motor re-winder). Also, if you can
de-laminate the core, it'll be lots easier to wind the secondary (it's just
a bitch to re-laminate afterwards)! Just pop-out the coil wedges, and
carefully slide a sharp knife between the E's & I's and wiggle the I's out
first, on each end, then tackle the E's. Most cores are laninated 1X1, 2X2,
3X3, or no interleave at all, just a big E & I (some even have a gap to
allow almost short-circuit operation for short periods of time). Might be
a good Idea to do a "turns ratio" test before de-laminating, so's you can
approximate the new turns req'd by the secondary. Best of luck!

Ray Heckert
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> From: James Owens <wotisname@...>
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Big, Cheap Power for Steppers
> Date: Tuesday, February 12, 2002 2:53 PM
>
> Hi Jan,
>
> Now that I know #12 is AWG I can consult my Zeus for sizes.
>
> I am now going to show my ignorance of things sparks & smoking.
>
> Our mains is nominal 230 volts AC, it is really 240 but I am being
> politically correct. If there is this greater voltage across the primary
> does the figure of 1 turn per volt change? I would also guess that enamel
> copper wire is the stuff to use?
>
> Regards,
>
> Terry