Electronics for New Machine + Chinese Spindle + VFD

[mturneruk]

Couple of final questions if you would be so kind.

1. Just setting the dip switches on my drivers.
I was told that 3.8Amps / 10 Microsteps would be a good place to start. With SW4 (half current mode) set to to off.
Does that make sense?

2. Also are these two wiring diagrams effectively the same thing ?
I am having a mental block. My wiring diagram shows A below, but I want to do B. Only worried about blue line e.g. ground / 0V.




3. Any problem with using the outside metal part of these as a way of passing the shield ground from stepper wiring into the box and on to the star ground?
My plugs only have 4 pins.

4. Jazz would those 5A time delay stepper fuses in your diagram in theory protect the machine / me at all if it should stall or crash ?

Cheers Chaps.
Martin