Newbie PSU calculations

[Muzzer]

Toroidal and E core transformers don't behave much differently in this application, so I wouldn't get hung up on what transformer you go for. If you are into audio amps, the toroidals generate less of a stray magnetic field which can mean less risk of hum.

BTW, if you are bothered by the Bees Nest (TM) fans in the LiChuan servos, you can replace them with pukka Papst / NMB / Sanyo etc fans from CPC. I did this on mine and it has made the noise almost bearable.

[dazp1976]

BTW, if you are bothered by the Bees Nest (TM) fans in the LiChuan servos, you can replace them with pukka Papst / NMB / Sanyo etc fans from CPC. I did this on mine and it has made the noise almost bearable.

Cheers for that. The fan in the servo drive is pretty damn loud.
I was originally just going to mount it open on the wall next to the machine until I heard the noise.
I've bought a bigger control box so I can get everything else + the servo drive inside it together and see if that helps.
If it still bugs me, then I'll give the fan swap a go

I'm still early days bench testing atm with my old parallel bob & Mach3 to get a feel for it (and confidence with servo's).
I'm playing will all setups, PWM, step/dir, axis, relay & opto modules etc.
I have loads of time on my hands to fiddle, and learning a fair bit :)

I'll start on benching the UC300eth next week with Mach and UCCNC.
I want to get a good feel for UC and get the controller working perfectly with both softwares first.
Then I'll fit up the new box and put them to machine.

Got myself a stepperonline driver for my Z last week too. DM860T (takes up to 80Vac or 110Vdc).
Putting 80Vdc to it which should give my Z (nema34 1080oz) a kick up the a**e