Luke11CNC Build Log ,I'm so naïve

[luke11cnc]

is this the right power supply ?

please look at link

http://www.ebay.co.uk/itm/500-Watt-A...#ht_1856wt_905

James and Luke

[Jonathan]

No, an ATX power supply is a computer power supply so although the power is fine you only get 12V (and 5V, 3.3V and some others) which is not sufficient. You will get a much higher feed-rate if the motors are run on a higher voltage. You ideally want 70 volts.

[luke11cnc]

I can't find the right power supply on farnell

I found a power supply 500w but only 48v ??

Help

rapid web site is down so I can't look on there

James

[Jonathan]

I can't find the right power supply on farnell

I found a power supply 500w but only 48v ??

Would be OK, but since your drivers can accept up to 80V it's best to do that. I can't find any on eBay that are above 50V, so I think the best option is the transformer I linked to on Rapid in post #46:

http://www.rapidonline.com/sku/Elect.../82719/88-3840

That one plus a couple of capacitors and a bridge rectifier, which I will already have. I can't find any on eBay at the moment ... that one is a bit expensive.

Annoying that the site is down, but it's easy to get round - just use google cache:

http://webcache.googleusercontent.co...w.google.co.uk

[luke11cnc]

Jonathan I will order the one from rapid on Tuesday

Will I need to order anything else for it (box) or will it fit in a old computer case along with my drivers and break out board

James

[Jonathan]

Computer case will be fine. Wire is cheapest from Rapid:

http://www.rapidonline.com/sku/Cable...119346/02-1066

(I'll buy the spare from you)

I emailed them and they said 2 weeks to deliver it.

Also for the power supply I'd get a bridge rectifier and terminal strip. I'll find them tomorrow when the site is working. They will also have suitable switches for limit switches.

[luke11cnc]

cool thank you Jonathan

well Luke has been in the garage/work shop for most of the day drilling the legs ready for the stepper mounts

to say he loved it is a understatement at the end of it I received the biggest hug,smile and kiss ever and as he was walking out the door he turned around as said dad " it's been the best day ever dad I love you"

I've taped the motor mounts with just a couple of mm to go but that's for Monday and Luke to do

Jonathan that jig worked really well

I think I've had the best day of my life as well

James and Luke

[JAZZCNC]

I have a spare torodal transformer and some 4700-100v caps and probably Br-rec that will get you 70+volts if you haven't bought them yet.
The torod is almost new I think it's 1000va but will have to dig it out to get full specs to be sure then i'll be able to work for you the exact volts + amps.
I think i've got 4x caps which can be wired parallel and If memory serves me I think this transformer and 4 caps was giving me around 76 ish volts and 14A ish.

PM me If this is any use to you and I'll give you my contact details.

[Web Goblin]

James,
what about something like this: http://www.antekinc.com/details.php?p=317

Ian

[Jonathan]

James,
what about something like this: http://www.antekinc.com/details.php?p=317

Ian

That would be ideal - it's just a lot more expensive than the one from Rapid, especially when you include postage.

well Luke has been in the garage/work shop for most of the day drilling the legs ready for the stepper mounts

to say he loved it is a understatement at the end of it I received the biggest hug,smile and kiss ever and as he was walking out the door he turned around as said dad " it's been the best day ever dad I love you"

I've taped the motor mounts with just a couple of mm to go but that's for Monday and Luke to do

Jonathan that jig worked really well

I think I've had the best day of my life as well

James and Luke

Sounds good...but where are the pictures?