Help me to choose transformer

[routercnc]

I am running 5 NEMA 23 motors from a 750VA toroid and there is a fair bit of inrush when it switches on (lights dim momentarily). I needed a 10A type D MCB in the end to avoid it tripping out.
1000 or 1200 VA is going to be interesting.

Do you need that much as the steppers do not take anything like the rated current added together

[Gytis]

Thank you for you're input,
I will take your advice and begin with a 750VA toroid, I can always upgrade if it will be necessary.

btw. you have an impressive machine and great vidoes!

[routercnc]

Thank you. Had fun making the machine and videos and the best thing was there was great feedback and it has helped give ideas to other builders.

On the toroid sizing question- I’m only repeating what others have said on here in the past and the Gecko website but the guide is 1/3 x number of motors x maximum current. So 1/3 x 8A x 4 =9.6 A. I think I would start somewhere there.

Sometimes people use a larger toroid for future proofing, depends if that needs to be considered. I suspect pulling small currents from very large toroids is not very efficient.