I'm in the process of rewiring my Mach3 Lathe controller due to noise problems and I have a few questions:
1. Should I connect the 5 Volt and the 48 Volt negative returns together or leave the outputs floating?
2. Should the negative outputs be isolated from equipment grounds, like Pc, Lathe and controller which are grounded to the GREEN AC ground.
3. Is it better use an external 5 volt power supply for the BOB or is the USB input OK, PROS & CONS?
4. Is it wise to add EMI/EFI filter and if so where should they be installed.
Bob