Re: [CAD_CAM_EDM_DRO] Running a Bridgeport Interact 1 Mk1 on single phase 240v

Hi Graham

Your lucky day <grin>

I have an Interact complete with manuals etc, and it is indeed possible to
run the whole lot on 240V single phase (apart from the spindle motor).
That ruddy great big transformer *should* have taps to allow it to run at
240V AC, but you MUST use a type B breaker in the consumer unit.

The spindle motor is a multivoltage unit that can be very easily wired in
delta mode for 240V - Then all you need to do is wire it to a 1.5KW VFD. Wire
it direct and do not use the contactors between motor and VFD (not that I
feel I need to tell you this, but others might not know).

The power for the TNC is derived from a small transformer near the top of the
main control cabinet - This too can be wired for 240V across the primary.

Regards, Paul.

On Monday 06 September 2004 14:35, dgsutton2000 wrote:
> I am thinking of getting an old Bridgeport Interact 1 with a TNC 145
> control because the machine is like new.  I want to run it on single
> phase and use the 145 control because it will do want I want for now
> and I'm used to Heidenhein, later on I will be converting it to PC
> control which thanks to other members of this group I know which
> direction to go in however that will still be single phase.
> So for now I want to power the machine from UK single phase 240v. To
> start off I was thinking of powering the main motor with an ABS
> single phase to 3 phase controller which will allow me to also
> inject D/C to spindle stop.

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