The manual for my US-made CNC milling machine has a page and a half devoted to proper grounding, with ground rod specs and wire gauges listed, and dire warnings about voiding the warranty if it’s not independently grounded close to the machine.
TREE MACHINE TOOL CO., INC. requires a separate “ground electrode” for grounding its machine tools. Maximum Permissible ground resistance is 5 ohms. Ground rod placement should be at a point as close to the machine as possible.The machine tool should not be grounded through its own conduit.
From a quick look around online it sounds like this is pretty common, and a source of contention since you’d normally have a single ground point. If the laser doesn’t really need an independent ground, then I won’t worry about it.
And no, I don’t use any of the universal outlets on the machine. Wiring issues aside, the machine is running off a 240v transformer and the chiller wants 120v. If I could change the voltage for the chiller, I’d just run the whole setup off of 208v (still in spec for the laser) and skip the transformer, but I’ve got the cabling all run overhead and running a separate AC line for the chiller would require another hour on the ladder.