latency and GRBL

Todd Zuercher wrote: As far as I know GRBL has no real time requirements for an interfacing PC, so latency should be completely irrelevant. (but I know next to nothing about GRBL)

Thank you. I just found another reference that reads pretty much along those lines. So, a PC capable of running LinuxCNC (Ubuntu) is all I need to worry about at this time. Latency won't be an issue until I go bigger and utilize a real "motion control board".

Question answered, IMO.

You don't need Linuxcnc at all. Linuxcnc will not interface with GRBL at all, nor any other motion control. Linuxcnc is a motion control, and will not play nice with another.

PS It’s been a long time since linuxcnc came with Ubuntu. The Ubuntu Linuxcnc ISOs are very obsolete.