Re: [CAD_CAM_EDM_DRO] Bridgeport BOSS4 wiring question

cncgramps wrote:

> Has anyone every wired there BOSS4 so you could use single phase
>straight to the controller?
> What I would like to be able to do is have the controller run on
>single phase and only use the 3 phase converter to run the spindle
>motor.
> I know it is changed inside the main power box but just wondering
>if anyone has rewired theres in such a manner.
> I think it would be nice to do setup work and even digitize using
>the axis motors without the need for a 3 phase converter running.
>
>

I don't think you can do this. Most, if not all, BOSS 3-6 (stepper)
machines
have a 3-phase power transformer. The stepper power supplies use a
saturable reactor to control motor current (and driver voltage). I suspect
this is tuned very carefully to the rectified 3-phase waveform, and would
cause all sorts of problems, either poor speed/torque or burned up motors
and driver cards if you just blindly switched it to a single-phase power
source.

Jon