Beagleboard x15 and LinuxCNC

Hakan, the i3-6100 setup looks interesting. What latencies do you get with this CPU?

Not that terribly good actually, around 40 µsec. Compared to the J1900 that stays below 8 µsec. But in practise it is enough to do everything including watching youtube while milling or turning (I switch between them). The only optimization is the tx-coalesce on the ethernet interface.

I would suggest plugging a USB WiFi dongle in to the machine to get internet access.
(But make sure you get one compatible with your OS)

The USB WiFi dongle sounds like a good idea.
I also found a PICO-ITX size single board computer with J1900 chip.

www.mouser.ie/ProductDetail/IEI/HYPER-BT...el6qMdHBH6MYHw%3d%3d

Would this be any good for controlling the CNC machine?

dom96 wrote: www.mouser.ie/ProductDetail/IEI/HYPER-BT...el6qMdHBH6MYHw%3d%3d
Would this be any good for controlling the CNC machine?

Hard to tell just looking at it. The 12V power supply is convenient for a CNC application.
(You can run it from 12V if you have that, or from a cheap buck-converter if the main voltage is higher)

Unfortunately the only way to be sure is to boot it into a realtime kernel and test the latency. But there is no reason to expect it to perform badly.