New Build, Aluminium Frame Router/Mill

[JAZZCNC]

Plasma by it's nature is dirty business so no surprise when that fires up but drives them selfs shouldn't be messing with radio.

So many things could be in play here like you know but I'd certainly start by getting rid of the SMPS for the drives. Nothing to them really just toroidal transformer Caps and bridge rectifier.

Size wise then it gets tricky with 50v because standard transformers either compute very close to 50vdc or just a little lower than needed.
The transformer I would use is this one with 2 x 33Vac secondery's giving 300va because. While it's less than 48vdc it's safer than next option which would close to 50vdc.

Normally I'd wire secondery coils in series which adds the volts together but keeps the amps same and use lower voltage seconderys. But in this case the nearist available which is 2 x 15Vac computes to low Ending up around 40Vdc after being recified.
Next option is 2 x 18Vac which takes too close to 50vdc.

So in this case going with 2 x 33Vac and wiring in parallel will give around 44Vdc and add the amps together giving 9A. This is much safer option and won't cost any performance. The way Toridal works then 9A is more than enough for 4 drives.

This one.
http://www.airlinktransformers.com/c...nge/CM0300233/

Then you'll need 3 x Caps around 4700uf 63v wired in parallel these will do nicely
http://www.ebay.co.uk/itm/4700uF-63V...-/111907866124

Then 25A bridge and your sorted.
http://www.ebay.co.uk/itm/KBPC2502-2...oAAOSwDk5T7ghA