Can anyone help? I have 2 servo drives that need 0v common for the step/direction & 1 that wants +5v common. My breakout board (C11t) will do either, but not mixed. I can get all three working by taking the 0v straight from the power supply back to one of the drives, but then I get all sorts of strange things happening with the inverter and the axis limits. I have a feeling I can solve this with opto isolators, but no idea how to make it happen. Am I mad? Should I wait until I get 3 drives the same or is there a slim chance I can get a working machine with a little help from this great forum :-D