Have been working on the wiring for the past few days. Interesting how many wires there are for machine which merely has 3 motors. Here is the component plate, a moment before I mounted it inside the cabinet, with all the components wired:
And all this to eventually control 3 motors
I decided that cutting power to the spindle drive on an Estop event was not what I wanted, since I didn't want the spindle to freewheel to a stop, but rather stop instantly, so I am using a contactor (bottom right) to cut the motor phases from the drive and switch in resistors between them instead, to dynamically brake the motor. I feel more comfortable with this.