Duet Controller or ebay spesh???

[cropwell]

They will also still crash because it's still essentially a PC inside that's running the show, but yes they are slightly more stable than a PC that's been used for several other tasks. However, if you do a fresh install of windows on a PC, turn off all the crap running in the background and just use it solely for the CNC with a decent motion controller then you won't get crashes.

I would guess that is little more than a GRBL based Arduino with a fancy graphics interface, still good enough for the job, especially if there is a buffered motion controller built in rather than native step/dir control. I would have to see the setup codes/procedure to be certain. Frankly I am not that interested at the Mo, but I might be if my PC fails to fire up after 2 years of down time.

EDIT - Having looked at the spec of the DDCS3 (or whatever) it is based on an ARM9 32bit RISC chip, this has been obsolete for a few years now (about 15 I think). There must be newer, better and possibly cheaper controllers out there.