Re: Older Bridgeport DRO help needed!

--- In CAD_CAM_EDM_DRO@y..., Paul Amaranth <paul@a...> wrote:

> On Tue, Apr 09, 2002 at 06:01:45AM +0000, Jon Elson wrote:
> > mhead28 wrote:
> >
> > > I have an older Bridgeport thextron 1810122 DRO head unit that
> > > appears to be in good working condition. The rear has 6 pin

military

> > > type connectors on it for the scales. Does anyone know the

pinouts of

> > > these?
> > >
> > > I have some gurley/teledyne linear scales (8780,8770) that I

would

> > > like to use with it. THey have plastic connectors that are

using 7

> > > pins. I assume the bridgeport uses the metal housing as the

shield. I

> > > need to figure out how to connect the 2. I found out from

gurley that

> > > the scales use:
> > >
> > > Pin 1 + 5VDC Red
> > > Pin 3 + 8VDC Blue
> > > Pin 5 Sine output Green
> > > Pin 6 Cosine Output Yellow
> > > Pin 10 Reference Zero White
> > > Pin 12 Ground Black
> > > Pin 14 Shield
> >
> > Depending on the date, sometime around 1970, all the US makers

switched

> > to metric scales, and put mm -> inch conversion in their readout

boxes.

> > So, you can't cross that bridge, in general. So, make sure both

your old

> > scales and the new ones read out in the same units.
> >
> > Second, these labels sound like these Teledyne/Gurley might be

analog scales,

> > rather than logic signals. That could be a big problem.
> >
> > Jon
> >
>
> I think they used a preamp board in their readout that converted
> the sin/cos scale output to digital.
>
> Paul
>

Which company are you talking about? Teledyne or Textron?

Tim