PSU : prices and differences

[Gytis]

Hallo,

Maybe some one can give me a short answer why I have to choose this one PSU: expensive
instead of this one: cheap

I know nothing about the electronics, but anyway.., I can't see any difference between them, except the price!

Thanks

[irving2008]

Expensive ones free shipping, the cheap one you pay for shipping?

Cheap one is 230v only, expensive one does 110 or 230v.

[Musht]

“There is nothing in the world that some man cannot make a little worse and sell a little cheaper, and he who considers price only is that man's lawful prey." John Ruskin

Dealt with Sure Electronics in distant past, they seemed pretty straight up and good value at the time, Meanwell are one of largest PSU makers in world, quality assurance has some costs.

Dealt with LED lighting for last 15 years, biggest cause of premature failure, bar none, is cheaping out on PSUs, there are some frankly scary power supplies out there, recovered from scrap and put in shiny case, assembled with half the parts missing, just plain assembled wrong and on more than one occasion have seen non passive faliures, ker -ferking-bang.

Genuine Meanwell is worth the extra for the piece of mind.

Cheers
Adam

[Clive S]

Hallo,

Maybe some one can give me a short answer why I have to choose this one PSU: expensive
instead of this one: cheap

I know nothing about the electronics, but anyway.., I can't see any difference between them, except the price!

Thanks

Perhaps A power supply with a toroidal transformer might suit your needs better if you are using it for steppers.

[Gytis]

Thank you guys,

if you are using it for steppers

Yes Clive, I need it for the 4 steppers at 3.5A

a toroidal transformer might suit your needs better

Any link for the toroidal transformers?

Thanks
Gytis

[Clive S]

Thank you guys,


Yes Clive, I need it for the 4 steppers at 3.5A


Any link for the toroidal transformers?

Thanks
Gytis

Well you could use something like this :- PS806-5 Linear power supply. or build one. it depends somewhat on the drive you will be using ...Clive

[JAZZCNC]

Hi Gytis,

You'll be much better with Unregulated supply so I'd go with toroid and build your own has the linked one doesn't provide enough currant. For 4 * 3.5A steppers You'll need minimum 8A and that only provides 6A.
It's not difficult and if you want to take that route then email me about it and I'll explain what's needed and were to buy components. Won't reply for a couple of days thou has I'm away from home at moment.

Dean.

[Gytis]

Hi Gytis,

You'll be much better with Unregulated supply so I'd go with toroid and build your own has the linked one doesn't provide enough currant. For 4 * 3.5A steppers You'll need minimum 8A and that only provides 6A.
It's not difficult and if you want to take that route then email me about it and I'll explain what's needed and were to buy components. Won't reply for a couple of days thou has I'm away from home at moment.

Hi Dean and Thank you!

I'm a little bit confused right now..,
I have Gecko G540, and I decided to use these motors from cncrouterparts
so if you think that the toroidal transformers suit them better, then I'll go with your suggested route

Thank you
Gytis

[irving2008]

Re building a PSU from a toroidal transformer have a look at this thread

http://www.mycncuk.com/forums/showthread.php?p=35458

Its a bit long but everything you need to know is there. Then come back and ask about anything you don't understand.

[Gytis]

Re building a PSU from a toroidal transformer have a look at this thread

Confirming PSU spec for steppers.

Its a bit long but everything you need to know is there. Then come back and ask about anything you don't understand.

Hi Irving,

I read the all thread,
But honestly speaking, this thread is not for the "noobs" like me..,
I read in the thread that you have 30 years experience in the electronics, so for you it's everything simple like a 2x2=4, but not for me Lol