I've attached a photo of my CNC machine as you can see controlling the spindle from it's independent unit will be easy,

I'm all for keeping things simple. I can control the spindle speed and stop start from it. I'm an experienced furniture maker.
Thinking it through I can't see a delay in stopping the spindle would be problematic.

So to emergency stop the rest of the CNC operation would running the E stop through the AXBB-E unit be best ?

Another question is what protection would be advisable in my electronics enclosure, circuit breakers or similar.
I'm most interested in protecting the AXBB-E unit and drivers.
So perhaps something basic to the power supplies and something more exotic to the electronic units ?

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