Re: [CAD_CAM_EDM_DRO] 220 Voltage To Feed Machine Motor and CNC Drives

brink905 wrote:

>I've got a Bridgeport machine with a 3 hp motor which is three phase
>that I am going run with 220 single phase thru a Hitachi SJ100
>inverter. The inverter will convert single phase power to three
>phase.
>
>Question that I have can I also use the same 220 single phase line
>to feed a 220 power supply that would be used for running Rutex
>drivers for the servo motors?
>

Not the best idea. VFDs produce HUGE amounts of electrical noise.
It might work fine, but you might also have problems with losing steps
or even worse behavior from the noise. Putting the servo drives on another
breaker only helps a little. You might need to put a line filter on the
cable between the VFD and the power outlet. I have had to do this with my
smaller VFD on my mill, mostly so I can read the computer screen - it
was massively interefered with when the spindle was running from the
VFD.

Anyway, you might get away with it, but if you have problems with lost steps
or other odd behavior, try isolating the power as a first step.

Jon