Re: Anilam glass scale hookup question

Bad guess all the way. You have just shown how to blow up the
encoder.

Regards,

Tim

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
>
>
> tig415 wrote:
>
> >I'm trying to find out the wiring info on the glass scales. They
> >have a Anilam decal on them. There are 6 wires coming out of the
> >plug . Red, black, white, green, brown and a shield. I'm assuming
> >power, ground, channel A, channel B, index and shield. Can anyone
> >tell me what wire does what or a way to figure it out with a test
> >meter? Also how do I determine how many volts they need.
> >
> >
> It would be a good guess that red is +5 V, black is ground. You
could
> probably
> check with an ohmmeter and see if black and red have a lower
resistance than
> to other wires. It is possible the scales use +12 V or other
voltage,
> but 5 V
> would not hurt them, assuming the correct connections. If you
aren't afraid
> to open them up, you can see if there is a capacitor connected
between the
> red and black wires. that would confirm them as power. You can
also check
> that there is an LED and a resistor connected in series to the
power wires.
>
> Once you are confident enough to apply power, you should see the
other wires
> changing state. A and B will flip between +5 and 0 V with
microscopic
> moves of the slider. The index will probably only have one pulse
over a
> very
> short range of movement. If your DVM has a beeper function, you
might be
> able to use that to detect the index pulse.
>
> You may need 1 K ohm resistors between the signal wires and +5 V if
the
> scale's output are open collector.
>
> Jon