Building My First CNC Router, Looking for Advice & Other Info

**AlexDoran** · 01-09-2017

Hi everyone,

The build is progressing slowly, mainly just waiting for parcels to arrive, i now have the extrusion and all of the bolts / fixings. I am struggling to figure out what my PSU requirements are, i was wondering if someone might be able to offer some advice?

I am using 4nm Nema 23's, and using Leadshine AM882 drivers from China.

This is the datasheet for the Motors i have:

PDF

Link for the stepper drivers:

AM882

Am i right in thinking that to get the most from the motors and drivers that i am going to need a 68 - 80v PSU? What amperage rating will it need to be? 20A+?

Again any help would be greatly appreciated, thanks.

Alex

**Clive S** · 01-09-2017

Am i right in thinking that to get the most from the motors and drivers that i am going to need a 68 - 80v PSU? What amperage rating will it need to be? 20A+?

68V with a 650 Va transformer. See Joe's excellent vid.

https://www.youtube.com/watch?v=4OoQ...zD30sZjtp_VyqY

**AlexDoran** · 01-09-2017

Hi Clive,

Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:

Power Supply

What do you think?

Thanks

Alex

**Clive S** · 01-09-2017

Originally Posted by AlexDoran

Hi Clive,

Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:

Power Supply

What do you think?

Thanks

Alex

Have a look at the vid. They are easy to build and only require a transformer, rectifier, and 3 Caps. If you are going with a switch mode power supply you will need one a lot bigger to handle the back EMF.

**Desertboy** · 01-09-2017

Originally Posted by AlexDoran

Hi Clive,

Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:

Power Supply

What do you think?

Thanks

Alex

I'm going to build one on advice of Clive S (Also Chaz pointed out do it right!) but if I was to buy one I'd buy these

https://www.omc-stepperonline.com/po...-s-350-60.html

UK shipping as well get one per motor.

**Clive S** · 01-09-2017

I'm going to build one on advice of Clive S (Also Chaz pointed out do it right!) but if I was to buy one I'd buy these

https://www.omc-stepperonline.com/po...-s-350-60.html

UK shipping as well get one per motor.

And I think you would be disappointed in the result and it will cost you double by the time you add duty etc.

**Desertboy** · 01-09-2017

Originally Posted by Clive S

And I think you would be disappointed in the result and it will cost you double by the time you add duty etc.

No duty on that one Clive as long as you select UK shipping ($3 more) but you're probably right about the disappointed lol.

I found most the stepperonline stuff is available for either Germany or UK shipping so no import tax and quick shipping but unfortunately not the AM882's :(

I found them through CNCzone where they've been getting rave reviews from some of the purchasers.

**AlexDoran** · 01-09-2017

In what way does the performance differ?? I was planning to use one 500Watt PSU per 2 Stepper Drivers?

If not could anyone link me to where I could get the parts to build one??

Cheers

Alex

**Clive S** · 01-09-2017

Originally Posted by AlexDoran

In what way does the performance differ?? I was planning to use one 500Watt PSU per 2 Stepper Drivers?

If not could anyone link me to where I could get the parts to build one??

Cheers

Alex

https://www.rapidonline.com/50a-brid...al-case-519318 1 of

https://www.rapidonline.com/samwha-h...acitor-11-3121 3 of

https://www.rapidonline.com/lcr-ep08...-clamp-11-3004 3 of

https://www.rapidonline.com/vigortro...-x-25v-88-0034

Some people like 24-0-24v I generally use the above

**Desertboy** · 01-09-2017

Originally Posted by Clive S

https://www.rapidonline.com/50a-brid...al-case-519318 1 of

https://www.rapidonline.com/samwha-h...acitor-11-3121 3 of

https://www.rapidonline.com/lcr-ep08...-clamp-11-3004 3 of

https://www.rapidonline.com/vigortro...-x-25v-88-0034

Some people like 24-0-24v I generally use the above

Thanks for the shopping list ;) Was looking for the previous post were you posted this for me but couldn't find it, this time going to order it tonight.