UC300ETH: UCBB Vs UB1 breakout board ?

[dazp1976]

OK yes I can see how that would work. For info, I have been emailing Balazs at CNCdrive today and he has been replying pretty quickly. Impressive given it is Sunday afternoon/evening, and a bank holiday (in the UK at least) ! Anyway I asked what would happen if 2 stepper drivers were connected to a single step/dir output E.g. if I went with the compact AXBB-E route which can drive 4 stepper drivers as standard, and connected both of my 2 Z step/dir to the same output to drive a total of 5 steppers. This saves the additional BoB, ribbon cable etc. In this scenario I would have:

1: X axis
2: Y axis
3: Z axis & 2nd Z axis from same step/dir outputs
4: A axis (slave for X axis)

The answers from him were when using one output to drive 2 stepper drivers:

Beings you're talking about a Z axis. My assumption is you won't need it ridiculously fast.
It is my understanding that another option is you can run 2 steppers from a siingle driver as long as you follow ohms law.
So example if you have 2 steppers rated at 4A, you can safely run both together using a 8A capable driver so you can up the running voltage Thus only needing to use one axis output from controller.

A little research needed on this other option.

These diagrams are in series. Apparently run better with higher voltages due to it being shared.
They look slightly different so I assume one will spin both in same direction, one will spin them in opposite directions.
Can also run parallel which shares current so then needs higher amp settings.