Quote Originally Posted by Kitwn View Post
Don't fret mate!
My radio/TV background doesn't allow for much ripple on a DC power supply so I was expecting to see huge quantities of expensive smoothing capacitors on a linear supply of the sizes discussed here. For this application you don't need that much.

I'm not brainy enough to use Faraday's Law to work out the inrush for a given transformer, but I suspect you need a pretty chunky lump of iron for that to be the only significant contributor to the overall inrush.
Hah... try doing math when your head is on the equivalent of 10 pints of lager. I read some of the posts here and go, “Errr... what the heck? The drives can take AC direct from the transformer... that ripple is going to be awful!”, without thinking it through that the drive itself will do the cleaning.

This is the problem with someone who knows a little bit of knowledge and thinking they know what to do (that’s me btw). Unfortunately, microelectronics which is VERY pick about power stability and a CNC drive that is going to take 60v from an AC transformer is two very different things.

Unfortunately I won’t be able to get my kit for at least a month apparently... nobody appears to be working at the factory/distributors in China. They are talking 2 weeks to even start back up again and maybe longer.