Definately a scrapyard challenge

[JAZZCNC]

Very easy to make a power supply. Connect primary of transformer to mains via a fuse, secondary to bridge rectifier (e.g. bit excessive but you can't go wrong with http://www.rapidonline.com/Electroni...ctifiers-29671) and output of rectifier to smoothing capacitors. Minimum about 10,000uF, 80V or greater. Switch on and check the output voltage and polarity is correct with multimeter just to be sure then connect it to the stepper drivers.

Jonathan I,m sorry but I'm not happy with your reply and I've got to say something.

Your flippant answer regards transformer and capacitors/rectifier is very dangerous in the wrong hands and your putting folks in danger of either blowing up there drives and worse still potential to KILL them selfs.:surprised:

They need to know that yes while it's not difficult to build a transformer supply it does have to be done correctly and components correctly sized to give the correct output they require.
They need to know that the transformer seconderys need to calculated and sized correctly so when rectified from AC to DC they get the correct output so doesn't fry there drives.!

They need to know for stable performance the capacitence should be calculated in relation to V & A required, to say just use anything bigger than 10,000uF is far from ideal.!!
They also need to be aware of the very big potential to KILL them selfs if they dont treat Big capacitors with respect.
They should also be made aware of the need to build in a capacitor drain to be absolutly safe when working on the control box, and that regardless of whether the box is plug in the wall or not that with out a drain system built in then there at risk of being fately electricuted if touched in the wrong place.!!

They need to be made aware of other factors regards rectifiers, like they should really be mounted on heat sinks also how they are wired and they have positive and negative output.

Folks It's not difficult but it's not just simply grab any old transfromer and capacitors and stick it together with a recitfier like Jonathan makes it appear.!!
It needs to be calculated correctly for correct output and as always when working with electricty treated with utmost respect.

While I know how to size and build one I won't post the information in thread like this because of the potential for error then blame.!!
I will gladly help folks on a one to one basis via email or preferably on the phone/skpe because I can explain and control better that it's done correctly. Just won't do it in public.!!

The information regards sizing components correctly is available on the net if you search. But please be sure you fully understand before attempting other wise you risk the BIG possibilty of destroying your drives or Worse your self if you get it badly wrong.:confused:

EDIT: Jonathan dont bother coming back at me because you can't really and I'm not getting into another thread hi-jacking slanging match just needed to be made clear for the sake of others.

Bruce I'm sorry for wasting more of your thread space.