1200mmX900mmX170mm 4axis cnc

**Nickhofen** · 13-03-2018

It seems that i mess things up.
I order first two AM882 stepper drive they are on the way and today I discover that they are not the -H version, how bad is that?

**cropwell** · 13-03-2018

Originally Posted by Nickhofen

It seems that i mess things up.
I order first two AM882 stepper drive they are on the way and today I discover that they are not the -H version, how bad is that?

Send 'em back !

**Desertboy** · 13-03-2018

Originally Posted by Nickhofen

It seems that i mess things up.
I order first two AM882 stepper drive they are on the way and today I discover that they are not the -H version, how bad is that?

No problem at all I have 1 AM882 and 3 AM882h the only differences are the h are rated for AC and also for a slightly higher input voltage (100vdc instead of 80vdc)

feed them ~70v dc and they perform identically, I mixed them and I don't know which one is which lol they all fire stall protect fine if I drive the machine to hard and jumper setting are universal between them.

In future I am going to buy 4 AM882h's for a bigger build but I have a spare toroidal transformer that outputs 78v when rectifed which is high for the AM882's but fine for the AM882h's.

One thing I'm sure is just good practise is if you have a dual ballscrew Y axis using 2 AM882's (Or h's) on that axis and not mixing them.

**Clive S** · 13-03-2018

Originally Posted by Nickhofen

It seems that i mess things up.
I order first two AM882 stepper drive they are on the way and today I discover that they are not the -H version, how bad is that?

Nick The main difference is that the H version can accept AC input and a higher DC input. It is difficult to find AM882's drive now.

Don't panic they are fine.

**Nickhofen** · 13-03-2018

Thanks guys for the input,Cropwell I think of that but the shipping cost from here to China is very high unfortunately.
Desertboy that is the first thing that came to my mind ,the other two for the Y axis to be am882h, good input about the voltage rate.
Clive now he only thing I have to concern is that when I receive the Am's and open the box from mail ,not to have two monkeys drives to jump out instead of the real thing,haha!

**Nickhofen** · 13-03-2018

I believe it is time for me to start building the power supply!
The motors I have are those:
https://www.cnc4you.co.uk/Stepper-Mo...arch=Nema%2023
And the drivers ...well you guys know!

Any diagram to follow and rate of the components for my driver's? Thanks!

**Clive S** · 13-03-2018

Originally Posted by Nickhofen

I believe it is time for me to start building the power supply!
The motors I have are those:
https://www.cnc4you.co.uk/Stepper-Mo...arch=Nema%2023
And the drivers ...well you guys know!

Any diagram to follow and rate of the components for my driver's? Thanks!

See this https://www.youtube.com/watch?v=4OoQ...zD30sZjtp_VyqY Joes vid is good

**Nickhofen** · 13-03-2018

Thanks Clive, I was looking for this video,it is from the first I see here at the forum, but couldn't recall who build it and took the video,I am getting old!

**Clive S** · 13-03-2018

Originally Posted by Nickhofen

Thanks Clive, I was looking for this video,it is from the first I see here at the forum, but couldn't recall who build it and took the video,I am getting old!

Not as old as me but if you need the list of part from Rapid https://www.rapidonline.com/NewProdu...rce=header-bar let me know.