Quote Originally Posted by Jonathan View Post
From Mach3's point of view the system will not look any different regardless of how you power it. Mach3 just sends out the step and direction signals.

My post here may interest you, since it includes more detail about why 24V (TB6560 etc) can be unsuitable:
http://www.mycncuk.com/forums/genera...html#post25191

So long as the PSUs are electrically isolated you could connect them in series as you describe, so long as the total current drawn from either is not greater than it's rating.

Before I comment further, can you provide a link to the datasheets for the stepper motors you have since that would make it a lot easier to work things out?
Thanks , I don't have any link to data sheet for motors...

I already decided to buy another drivers for stronger motors so I could run them on 48 V .

Now i just need to decide on the drivers that can go up to 50 V .

I had 2M542 planned ... If there is no better solution or if there is no downside to them ?

I don't want to do same mistake as with the first drivers I bought :)