Carving as normal without any issues. Have surfaced some wood and was carving a couple of patterns. All progressed as expected and suddenly I was aware the router was not moving (still spinning) and CM had lost contact with the cutter.
Power is making it as far as the power box which is showing a green light suggesting that is on and the inline switch appears to be working except I did not hear any thunk as the inline switch is pressed. I wonder if this where the issue has started and finished. No power is getting as far as the stepper motors.
Having stuck the inline switch to a convenient spot on the machine, I will have to remove it and look at it. Is this a known point of spontaneous failure? With electronicss, things either work or they don’t. A potential failure a short way (9 months) through their service life is disappointing.