PSU : prices and differences

Making your own is quite simple as long as you do your sums first. Just make sure you get the voltage right and have a bit of spare "currant".
Attachment 9760

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Originally Posted by irving2008

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.

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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

Thank you for the simple explanation Dean!

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Originally Posted by JAZZCNC

Get in touch if you want to build one.!!

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You think that you have enough patience with me if I choose DIY route?:hopelessness:

I'm sure that if you ask nicely, one of the guys on here will make you a PSU for cost price + a couple of beers.

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Originally Posted by birchy

one of the guys on here will make you a PSU for cost price + a couple of beers.

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Wouldn't be the first time ;)

Get the bits sent to me and I'll solder it up for you - it wont take more than 15 minutes. In fact I think I have a spare new 500VA toroidal transformer... 4 motors at 3.5 amps, so you need about 70% of 4*3.5 which is 9.8 amps. 9.8*50V=490VA ... so the transformer I think I have is perfect.

Jonathon, wouldn't it be easier for you to buy the parts, make the PSU and send him a paypal invoice? There seems to be a serious lack of decent quality PSU's on eBay... :thumsup:

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Originally Posted by Gytis

You think that you have enough patience with me if I choose DIY route?:hopelessness:

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No problem mate I've helped proper thick twats in the past and they got it in the end. . .Lol

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Originally Posted by Jonathan

Wouldn't be the first time ;)

Get the bits sent to me and I'll solder it up for you - it wont take more than 15 minutes. In fact I think I have a spare new 500VA toroidal transformer... 4 motors at 3.5 amps, so you need about 70% of 4*3.5 which is 9.8 amps. 9.8*50V=490VA ... so the transformer I think I have is perfect.

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Thank you very much Jonathan for the offer!
But I like to learn new things, so I'll try DIY route., just in case if Dean lose his patience with me, then I'll be back to you with big case of beer :beer: and I ask you to do it for me.

Thank you!

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Originally Posted by JAZZCNC

No problem mate I've helped proper thick twats in the past and they got it in the end. . .Lol

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Hi Dean,
I'm ready to go DIY route, when you have time can you point me out where I have to look and what I have to buy for the PSU?

Thank you!

The mains things are;

Capacitors:
SNAPIN:4700UF/63V Panasonic (ECES1JU472N) 25.5 X 50 | eBay

Transformer (other places have them too):
Toroidal Transformer 500va 0 50v 0 50v

Rectifier (excessive rating, but means you don't need a heatsink so it's easy):
KBPC5006 Bridge Rectifier 50A 600V

Plus you'll probably want a fuse holder and a switch...