Re: VFD problems with my Bridgeport CNC../rotary

David, how was Spence drip feeding his machine? Was he using a BTR or
did he find a way to drip feed via the RS232? I tried to get my BOSS
6 to drip feed via RS232, but after much research, came to the
conclusion that drip feed via RS232 was not supported until BOSS 8
(I'm hoping my conclusion was wrong).

~petev

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ibewgypsie"
<ibewgypsie@h...> wrote:

> Even with a rotary, make sure the inverter, the control 220/120

transformer

> and other loads are on the input lines of the rotary. I'd have a

electrician

> check the outputs on the 3 phase transformer for the stepper

drives. (cabinet

> in the back in the left middle w 3 stacks) I think if my memory

serves me, it

> should be 68 volts per phase..
>
> If you had some way of getting around the 3 phase stepper drives,

you'd not

> need 3 phase in the machine now you have a inverter.
>
> DO you have manuals? I have a friend on another board who scanned

a

> bridgeport boss manual onto cdrom.. Them schematics are mighty

helpful if

> you want to repair or work on a boss type system. Mine bears no
> resemblance to the orginal machine, except I reused the terminal

strips,

> capacitors, 220/120 120/24vdc transformer.
> I have some spare boss parts somewhere. Bridgeport did the motors
> unipolar. I have my machine running bipolar Larken cobra16 drives

at 8

> amps.. With all the work I did to mine it runs about as fast as it

did stock.. 110

> ipm. (same with racecars sometimes) Spence Jorgensen (HSM board)

was

> using a drip feed with a stock boss, it worked for him, not me...
>
> David
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Raymond Heckert"
> <jnr@a...> wrote:
> > Don't try to run the whole machine from the VFD, unless you can

keep it's

> > output at the B'Port's 'Rated' voltage. If your BOSS 3 has a

variable speed

> > spindle, use it, else use the VFD on the spindle only, and get

a 'Rotary'

> > for the rest of the machine.
> >
> > RayHex
> >
> > ----------
> > > From: Mike Mueller <mueller914@y...>
> > >
> > > I have the feeling the FVD is "only" for the main spindle

motor and that

> > it is not wise to try and power the entire machine with it???
> > >
> > > Am I correct here? I hooked up the VFD, turned the power on the

machine

> > (I could hear only the fans run in the Boss 3 case) and the Hz

LED should

> > on average of 13Hz until I turned the High/Low range knob and got

an error

> > on the VFD.
> > >
> > > If it helps any, the VFD is a Hitachi L100-015nfu.
> > >
> > > Would a rotary phase converter be what i really need/want for

this

> > application?
> > >
> > > thanks......