Control two machines at the same time

Hi all,
I currently use LinuxCNC (the latest version of the "master" git branch) on Gentoo Linux. It works well. I am building a second machine that will have a larger machining area as well as be faster. I know I won't be able to drive both machines at the same time using LinuxCNC (even if I had a second parallel port). If the second machine was controlled by grbl can I control the current machine by parallel port using LinuxCNC as I currently do and send commands to grbl at the same time to the other machine over USB? I expect the answer will be along the lines of "try it and see" but I'd like to know if anyone has done this before.

Thanks,
Allistar.

Try it and see !
I am not aware of anyone here mentioning that, but i also can not think of any reason why it should not.
If both machines have to do the same job, that is easy as you can wire outputs from BOB to both machine drives and add anothe relay to control the other spindle. Or you can add another BOB.
There is also the posibility of doing two different things but that would require another parallel port and Linuxcnc setup as 6 axis machine, editing gcode or the post processor, meaning a lot of editing and trouble.
The easiest solution would be to get another PC, a used one does not cost much.
Let us know how it works out.