Quote Originally Posted by JAZZCNC View Post
And I'd rather stick my Johnson in the mains socket before run machine with two signals sticking into one Motor Output.!! . . . . . Just because it appears to be working doesn't mean it's working correctly.!

Taking this to ridiculous extreams using your method would suggest I could run several identical machines, say 6 machines with just one 3 axis controller each pulling signal from same Motor Output.!! . . . . . Wonder why industry haven't figured this out yet.?
IMO I don't see a problem driving two or more motors from one output, providing the output is capable of providing the milliamps required, I have done this several times without any problems. Most drivers have opto inputs and are isolated from each other, have even used two driver inputs in series on occasion. Since these controllers are digital, they process things sequentially so two seperate outputs are likely to be seperated in time (admittedly very short) which is not the case with using a common output for two motors.

I see videos of multiple headed machines carving many identical models simultaneously, it would not surprise me if they were driven from common outputs.