Quote Originally Posted by A_Camera View Post
Perhaps it is too late now, but here are some things I'd do differently...

I would move that VFD out of the cabinet. You will likely experience some problems with the UC300 in the middle and so near the VFD. The other alternative to moving out the VFD is to move out the UC300 into it's own shielded box.

The other modification I'd do is to install the PSUs in an orientation which would allow the fans to cool and would allow easier wiring. As it is now, you can't stick a screw driver inside the cabinet to attach/detach wires, you have to remove each PSU, screw in all the wires and install the PSU in the cabinet again. That is going to create some practical problems and may result in a not so nice wiring in the end.

A question... are you planning to feed the UC300 with an external +5V? I think that's better than using the PC USB power. Make sure your +5V is very clean otherwise you may experience problems with the UC300. The other thing is that if you want to control the VFD spindle speed with 0-10V you can do that from the UC300 directly, but if you will use Mach3, or some other software with Modbus capabilities than a neater solution is to use the RS485. Considerably better than digital outputs and 0-10V, also demands less and easier wiring.

Nothing is ever written in stone, the one is a porposed idea and the second which looks like its fixed was laying out the components to see what it looked like.
Things have moved on since then, I now am using din rail with 5vdc and 24vdc psu's the two 36vdc psu's are going to be mounted flat one above the other, loads of room to do that.
The VFD will be in the enclosure, with double screened cables and fed via an emi 10A filter.
The UC300 & BOB have been relocated at the bottom of the case well away from the VFD.
All screens and earths to a star earth point.
I will upload photos of all the component laters.