Electronics for New Machine + Chinese Spindle + VFD

[JAZZCNC]

As there are 2 power inputs into the box, the fuses are built into the 10A Chassis power input sockets. Not sure why i would need any more.

Why do you think each electrical item in your house has it's own fuse.? Why not just rely on the Main Breaker in the consumer unit.?
Think about and it's obvious.!!

I am confident i can wire it ok.

The above statement contradicts this slightly.!!

Yes E'stop mounts on the front and wires into the breakout board directly. However you've made me think now about E stopping the spindle as well.

Wiring to the BOB is Not Safe. EMERGENCY STOP is exactly that and should remove all power when pressed. Wiring direct to the BOB is only in forming Software to stop the program or at best drop Motor outputs which isn't safe.
Correctly done then E-stop will remove power to every electrical item so VFD is included. Don't confuse E-stop with Limits etc they are and should treat different.
Creating a Safe E-stop isn't difficult or expensive so there no real reason why not to do it correctly.

Obviously if i could get away with using this box i would like to as i have bought it now.

I was planning on having male / female screw on glands on the front of the box for the steppers to connect to, so the box can be separated.

Just seen this which is even tighter.
http://s26.postimg.cc/3rqeewhcp/image.jpg

However he has got partitions which i think is a good idea.

Martin just because someone else has done it wrong doesn't mean you should too.!! . . . What he's not saying or maybe not aware of YET is that the Heat is killing his drives slowly and there life span will be considerably shorter in there unless he's got Lots of Cooling.
The potential for problems is hugely increased due to heat, missed steps, low performance strange lock-ups and all sorts of other wierd and wondeful thigns can happen because of heat and the often new CNC users arnt even aware of them because they know no different.
When the reality is there machine is being strangled in some way or they waste money buying bigger motors or drives etc thinking there missed steps or rough running motors is due to them when it's not.

Heat sends Electrical items Bonkers at best, Kills them at worst.!!

Space for EMF isn't such a big deal provided Grounding is correct and routing of wires is done sensibly

My advise is look around at what others have done or ask and LISTEN to what is said by experienced builders. Then do it correctly and don't cut corners other wise it will cost you more money in long run and be painful experience in the process.!!